|
Ok, a wee bit of a (I'm stuck in my house) story:
A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in Alabama). I think I posted that pic previously and I have also related some parts of my R90S resto story in the past.
Anyway, after the resto, the clutch lever worked very easily, I was very surprised at how easy the clutch pulled in, and that had me comparing clutch pulls on other R90Ss and none of them were near as easy as mine was. But I was grateful for how easy it was to pull in the clutch even though the "easiness" of it made no sense.
THEN about 6 months ago the clutch started to slip, you know, give it gas in 5th and the tach starts to spin up uncontrollably. Now this was the 4th time the clutch had started to slip, two previous times there was too much lube on the splines, even though I did not think there was, and the clutch on my friend's restored R90S never slipped. So this clutch thing was driving me crazy.
In frustration, I finally just took it to my dealer. But before that I had inquired of an expert who replied in an all knowing manner that he had told me 10 years ago I had the wrong spring installed, it was for an R75 and R90, not for the higher horsepower R90S; the proper R90S spring ended in part number -035, and even my dealer recently referred me to yet another spring number! I was mystified as to what was going on.
So finally Karl Myers took it all apart (thanks Karl!) and the part number stamped on my spring WAS the -035 part number, the correct one. Then he installed a new spring and put it all back together. I have not ridden the bike yet (yea for COVID-19), ?NOT...
But now the clutch pull is like it should be, TOO difficult :-) I was spoiled!
(Evidently the original part had not been properly heat treated during manufacture.)
So very recently I had my dealer install an EZ Clutch, from Bench Mark Works?
Part number: acc018 easy soft clutch?
This is a device that uses the same principal as when winching in an offroad?4X4 situation; if you run the winch line out to a fixed object, say another vehicle, and run the winch line through a snatch block pulley mounted to that vehicle, see below, and back to the winch, the pulling power is doubled, but the amount of line required to be pulled in, is twice than previously, an acceptable trade off IMO.? See pic below of the EZ clutch installed.
SO that is my frustrating tale, and if you want an easier clutch pull, I highly recommend the EZ clutch ?:-)
It makes a HUGE difference and actually feels now like only 1/3 of the pressure compared to what was previously required, which would be immensely better say, for city travel with lots of stop and go traffic.
Back to being bored....... :-)
Mac Kirkpatrick Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
_._,_._,_
|
what a great idea. I've noticed how my strength has slipped in my old age! this may be the solution.
Ted Cymbaly
Ok, a wee bit of a (I'm stuck in my house) story:
A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in Alabama). I think I posted that pic previously and I have also related some parts of my R90S resto story in the past.
Anyway, after the resto, the clutch lever worked very easily, I was very surprised at how easy the clutch pulled in, and that had me comparing clutch pulls on other R90Ss and none of them were near as easy as mine was. But I was grateful for how easy it was to pull in the clutch even though the "easiness" of it made no sense.
THEN about 6 months ago the clutch started to slip, you know, give it gas in 5th and the tach starts to spin up uncontrollably. Now this was the 4th time the clutch had started to slip, two previous times there was too much lube on the splines, even though I did not think there was, and the clutch on my friend's restored R90S never slipped. So this clutch thing was driving me crazy.
In frustration, I finally just took it to my dealer. But before that I had inquired of an expert who replied in an all knowing manner that he had told me 10 years ago I had the wrong spring installed, it was for an R75 and R90, not for the higher horsepower R90S; the proper R90S spring ended in part number -035, and even my dealer recently referred me to yet another spring number! I was mystified as to what was going on.
So finally Karl Myers took it all apart (thanks Karl!) and the part number stamped on my spring WAS the -035 part number, the correct one. Then he installed a new spring and put it all back together. I have not ridden the bike yet (yea for COVID-19), ?NOT...
But now the clutch pull is like it should be, TOO difficult :-) I was spoiled!
(Evidently the original part had not been properly heat treated during manufacture.)
So very recently I had my dealer install an EZ Clutch, from Bench Mark Works?
Part number: acc018 easy soft clutch?
This is a device that uses the same principal as when winching in an offroad?4X4 situation; if you run the winch line out to a fixed object, say another vehicle, and run the winch line through a snatch block pulley mounted to that vehicle, see below, and back to the winch, the pulling power is doubled, but the amount of line required to be pulled in, is twice than previously, an acceptable trade off IMO.? See pic below of the EZ clutch installed.
SO that is my frustrating tale, and if you want an easier clutch pull, I highly recommend the EZ clutch ?:-)
It makes a HUGE difference and actually feels now like only 1/3 of the pressure compared to what was previously required, which would be immensely better say, for city travel with lots of stop and go traffic.
Back to being bored....... :-)
Mac Kirkpatrick Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
|
Now you know that’s cheating Mac….迟丑别 original R90S clutch was designed to be a hand strength training device, come on now! Oh….,?? If you think that clutch is hard to pull try pulling the clutch lever on a Benelli Sei six cylinder sometime ! Todd ? what a great idea. I've noticed how my strength has slipped in my old age! this may be the solution. ? Ok, a wee bit of a (I'm stuck in my house) story: A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in Alabama). I think I posted that pic previously and I have also related some parts of my R90S resto story in the past. Anyway, after the resto, the clutch lever worked very easily, I was very surprised at how easy the clutch pulled in, and that had me comparing clutch pulls on other R90Ss and none of them were near as easy as mine was. But I was grateful for how easy it was to pull in the clutch even though the "easiness" of it made no sense. THEN about 6 months ago the clutch started to slip, you know, give it gas in 5th and the tach starts to spin up uncontrollably. Now this was the 4th time the clutch had started to slip, two previous times there was too much lube on the splines, even though I did not think there was, and the clutch on my friend's restored R90S never slipped. So this clutch thing was driving me crazy In frustration, I finally just took it to my dealer. But before that I had inquired of an expert who replied in an all knowing manner that he had told me 10 years ago I had the wrong spring installed, it was for an R75 and R90, not for the higher horsepower R90S; the proper R90S spring ended in part number -035, and even my dealer recently referred me to yet another spring number! I was mystified as to what was going on. So finally Karl Myers took it all apart (thanks Karl!) and the part number stamped on my spring WAS the -035 part number, the correct one. Then he installed a new spring and put it all back together. I have not ridden the bike yet (yea for COVID-19), ?NOT... But now the clutch pull is like it should be, TOO difficult :-) I was spoiled! (Evidently the original part had not been properly heat treated during manufacture.) So very recently I had my dealer install an EZ Clutch, from Bench Mark Works? Part number: acc018 easy soft clutch? This is a device that uses the same principal as when winching in an offroad?4X4 situation; if you run the winch line out to a fixed object, say another vehicle, and run the winch line through a snatch block pulley mounted to that vehicle, see below, and back to the winch, the pulling power is doubled, but the amount of line required to be pulled in, is twice than previously, an acceptable trade off IMO.? See pic below of the EZ clutch installed. SO that is my frustrating tale, and if you want an easier clutch pull, I highly recommend the EZ clutch ?:-) It makes a HUGE difference and actually feels now like only 1/3 of the pressure compared to what was previously required, which would be immensely better say, for city travel with lots of stop and go traffic. Back to being bored....... :-) "After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue ?
|
That's interesting! Someone here in Italy says that this device allows the clutch lever to make only 3/4 of its stroke. It's true?Thanks for any advice...
Antonio
Il domenica 5 aprile 2020, 01:04:46 CEST, Todd Trumbore via groups.io <motorrader@...> ha scritto:
Now you know that’s cheating Mac….迟丑别 original R90S clutch was designed to be a hand strength training device, come on now! Oh….,?? If you think that clutch is hard to pull try pulling the clutch lever on a Benelli Sei six cylinder sometime ! Todd ? what a great idea. I've noticed how my strength has slipped in my old age! this may be the solution. ? Ok, a wee bit of a (I'm stuck in my house) story: A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in Alabama). I think I posted that pic previously and I have also related some parts of my R90S resto story in the past. Anyway, after the resto, the clutch lever worked very easily, I was very surprised at how easy the clutch pulled in, and that had me comparing clutch pulls on other R90Ss and none of them were near as easy as mine was. But I was grateful for how easy it was to pull in the clutch even though the "easiness" of it made no sense. THEN about 6 months ago the clutch started to slip, you know, give it gas in 5th and the tach starts to spin up uncontrollably. Now this was the 4th time the clutch had started to slip, two previous times there was too much lube on the splines, even though I did not think there was, and the clutch on my friend's restored R90S never slipped. So this clutch thing was driving me crazy In frustration, I finally just took it to my dealer. But before that I had inquired of an expert who replied in an all knowing manner that he had told me 10 years ago I had the wrong spring installed, it was for an R75 and R90, not for the higher horsepower R90S; the proper R90S spring ended in part number -035, and even my dealer recently referred me to yet another spring number! I was mystified as to what was going on. So finally Karl Myers took it all apart (thanks Karl!) and the part number stamped on my spring WAS the -035 part number, the correct one. Then he installed a new spring and put it all back together. I have not ridden the bike yet (yea for COVID-19), ?NOT... But now the clutch pull is like it should be, TOO difficult :-) I was spoiled! (Evidently the original part had not been properly heat treated during manufacture.) So very recently I had my dealer install an EZ Clutch, from Bench Mark Works? Part number: acc018 easy soft clutch? This is a device that uses the same principal as when winching in an offroad?4X4 situation; if you run the winch line out to a fixed object, say another vehicle, and run the winch line through a snatch block pulley mounted to that vehicle, see below, and back to the winch, the pulling power is doubled, but the amount of line required to be pulled in, is twice than previously, an acceptable trade off IMO.? See pic below of the EZ clutch installed. SO that is my frustrating tale, and if you want an easier clutch pull, I highly recommend the EZ clutch ?:-) It makes a HUGE difference and actually feels now like only 1/3 of the pressure compared to what was previously required, which would be immensely better say, for city travel with lots of stop and go traffic. Back to being bored....... :-) "After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue ?
|
Antonio, I have not had a chance to ride my R90S since the installation of the EZ clutch, but the lever travel feels proper. Others have said it does work properly. I cannot say how much of the travel is involved, but again, assorting to the accounts of others it operates properly.
I was curious to see how much difference it made, and I am very impressed.
Mac Kirkpatrick Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
That's interesting! Someone here in Italy says that this device allows the clutch lever to make only 3/4 of its stroke. It's true?Thanks for any advice...
Antonio
Il domenica 5 aprile 2020, 01:04:46 CEST, Todd Trumbore via <motorrader= [email protected]> ha scritto:
Now you know that’s cheating Mac….迟丑别 original R90S clutch was designed to be a hand strength training device, come on now! Oh….,?? If you think that clutch is hard to pull try pulling the clutch lever on a Benelli Sei six cylinder sometime ! Todd ? what a great idea. I've noticed how my strength has slipped in my old age! this may be the solution. ? Ok, a wee bit of a (I'm stuck in my house) story: A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in Alabama). I think I posted that pic previously and I have also related some parts of my R90S resto story in the past. Anyway, after the resto, the clutch lever worked very easily, I was very surprised at how easy the clutch pulled in, and that had me comparing clutch pulls on other R90Ss and none of them were near as easy as mine was. But I was grateful for how easy it was to pull in the clutch even though the "easiness" of it made no sense. THEN about 6 months ago the clutch started to slip, you know, give it gas in 5th and the tach starts to spin up uncontrollably. Now this was the 4th time the clutch had started to slip, two previous times there was too much lube on the splines, even though I did not think there was, and the clutch on my friend's restored R90S never slipped. So this clutch thing was driving me crazy In frustration, I finally just took it to my dealer. But before that I had inquired of an expert who replied in an all knowing manner that he had told me 10 years ago I had the wrong spring installed, it was for an R75 and R90, not for the higher horsepower R90S; the proper R90S spring ended in part number -035, and even my dealer recently referred me to yet another spring number! I was mystified as to what was going on. So finally Karl Myers took it all apart (thanks Karl!) and the part number stamped on my spring WAS the -035 part number, the correct one. Then he installed a new spring and put it all back together. I have not ridden the bike yet (yea for COVID-19), ?NOT... But now the clutch pull is like it should be, TOO difficult :-) I was spoiled! (Evidently the original part had not been properly heat treated during manufacture.) So very recently I had my dealer install an EZ Clutch, from Bench Mark Works? Part number: acc018 easy soft clutch? This is a device that uses the same principal as when winching in an offroad?4X4 situation; if you run the winch line out to a fixed object, say another vehicle, and run the winch line through a snatch block pulley mounted to that vehicle, see below, and back to the winch, the pulling power is doubled, but the amount of line required to be pulled in, is twice than previously, an acceptable trade off IMO.? See pic below of the EZ clutch installed. SO that is my frustrating tale, and if you want an easier clutch pull, I highly recommend the EZ clutch ?:-) It makes a HUGE difference and actually feels now like only 1/3 of the pressure compared to what was previously required, which would be immensely better say, for city travel with lots of stop and go traffic. Back to being bored....... :-) "After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue ?
|
Not that it really matters but that clutch assist mechanism was invented many, many years before Benchmark even existed by (if I can recall correctly) Wallus Engineering who also sold a Dual Carb balancing unit based on the Dwyer Magnehelic gauge. I still have one or two of the original ones sitting around. ?They are great. ?You can also measure the thickness of the clutch springs for relative strengths. ?It is possible the spring was fine but just labeled wrong. I would think a non heat treated spring would have cracked fingers or would have deformed them instantly, not ten years later. Just a guess.
Richard Chawes
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Show quoted text
On Apr 4, 2020, at 4:23 PM, Antonio Frova via groups.io < afrova@...> wrote:
That's interesting! Someone here in Italy says that this device ??allows the clutch lever to make only 3/4 of its stroke.?It's true?Thanks for any advice...
Antonio
Il domenica 5 aprile 2020, 01:04:46 CEST, Todd Trumbore via groups.io < motorrader@...> ha scritto:
Now you know that’s cheating Mac….迟丑别 original R90S clutch was designed to be a hand strength training device, come on now! Oh….,?? If you think that clutch is hard to pull try pulling the clutch lever on a Benelli Sei six cylinder sometime ! Todd ?
what a great idea. I've noticed how my strength has slipped in my old age! this may be the solution. ?
Ok, a wee bit of a (I'm stuck in my house) story: A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in Alabama). I think I posted that pic previously and I have also related some parts of my R90S resto story in the past. Anyway, after the resto, the clutch lever worked very easily, I was very surprised at how easy the clutch pulled in, and that had me comparing clutch pulls on other R90Ss and none of them were near as easy as mine was. But I was grateful for how easy it was to pull in the clutch even though the "easiness" of it made no sense. THEN about 6 months ago the clutch started to slip, you know, give it gas in 5th and the tach starts to spin up uncontrollably. Now this was the 4th time the clutch had started to slip, two previous times there was too much lube on the splines, even though I did not think there was, and the clutch on my friend's restored R90S never slipped. So this clutch thing was driving me crazy In frustration, I finally just took it to my dealer. But before that I had inquired of an expert who replied in an all knowing manner that he had told me 10 years ago I had the wrong spring installed, it was for an R75 and R90, not for the higher horsepower R90S; the proper R90S spring ended in part number -035, and even my dealer recently referred me to yet another spring number! I was mystified as to what was going on. So finally Karl Myers took it all apart (thanks Karl!) and the part number stamped on my spring WAS the -035 part number, the correct one. Then he installed a new spring and put it all back together. I have not ridden the bike yet (yea for COVID-19), ?NOT... But now the clutch pull is like it should be, TOO difficult :-) I was spoiled! (Evidently the original part had not been properly heat treated during manufacture.) So very recently I had my dealer install an EZ Clutch, from Bench Mark Works? Part number: acc018 easy soft clutch? This is a device that uses the same principal as when winching in an offroad?4X4 situation; if you run the winch line out to a fixed object, say another vehicle, and run the winch line through a snatch block pulley mounted to that vehicle, see below, and back to the winch, the pulling power is doubled, but the amount of line required to be pulled in, is twice than previously, an acceptable trade off IMO.? See pic below of the EZ clutch installed. SO that is my frustrating tale, and if you want an easier clutch pull, I highly recommend the EZ clutch ?:-) It makes a HUGE difference and actually feels now like only 1/3 of the pressure compared to what was previously required, which would be immensely better say, for city travel with lots of stop and go traffic. Back to being bored....... :-) "After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue ?
|
A less common option for a lighter clutch action is to fit the light flywheel (clutch carrier in BMW-speak) and matching clutch assembly as fitted to the post '82 airheads.?
The input splines need to be shortened, and ideally the rear gearbox cover updated to match as well.?
Not everyone's idea of an easy or convenient solution, and it will no doubt evoke debate about light vs heavy flywheel preferences and originality etc, but the later clutch is a much better design that is able to transmit way more horsepower than any airhead could ever hope to produce.?
Most importantly though, the clutch action at the lever is much, much lighter than the original and way more pleasant to use.
FWIW, I did this on my 90S 14 years ago with no regrets. Other than the rear gearbox cover and clutch arm, it is very discreet, and I also prefer the revvy nature of the engine with the light flywheel :)
My $0.02
Nick Ploeg, self-isolated in sunny NZ
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Show quoted text
-------- Original message -------- Date: 5/04/20 11:41 am (GMT+12:00) Subject: Re: [R90SWORLDNET] EZ Clutch Story + R90S With Mac Kirkpatrick & Todd Trumbore: Barber Motorsports, 2018
Not that it really matters but that clutch assist mechanism was invented many, many years before Benchmark even existed by (if I can recall correctly) Wallus Engineering who also sold a Dual Carb balancing unit based on the Dwyer Magnehelic gauge. I still have one or two of the original ones sitting around. ?They are great. ?You can also measure the thickness of the clutch springs for relative strengths. ?It is possible the spring was fine but just labeled wrong. I would think a non heat treated spring would have cracked fingers or would have deformed them instantly, not ten years later. Just a guess.
Richard Chawes
On Apr 4, 2020, at 4:23 PM, Antonio Frova via groups.io < afrova@...> wrote:
That's interesting! Someone here in Italy says that this device ??allows the clutch lever to make only 3/4 of its stroke.?It's true?Thanks for any advice...
Antonio
Il domenica 5 aprile 2020, 01:04:46 CEST, Todd Trumbore via groups.io < motorrader@...> ha scritto:
Now you know that’s cheating Mac….迟丑别 original R90S clutch was designed to be a hand strength training device, come on now! Oh….,?? If you think that clutch is hard to pull try pulling the clutch lever on a Benelli Sei six cylinder sometime ! Todd ?
what a great idea. I've noticed how my strength has slipped in my old age! this may be the solution. ?
Ok, a wee bit of a (I'm stuck in my house) story: A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in Alabama). I think I posted that pic previously and I have also related some parts of my R90S resto story in the past. Anyway, after the resto, the clutch lever worked very easily, I was very surprised at how easy the clutch pulled in, and that had me comparing clutch pulls on other R90Ss and none of them were near as easy as mine was. But I was grateful for how easy it was to pull in the clutch even though the "easiness" of it made no sense. THEN about 6 months ago the clutch started to slip, you know, give it gas in 5th and the tach starts to spin up uncontrollably. Now this was the 4th time the clutch had started to slip, two previous times there was too much lube on the splines, even though I did not think there was, and the clutch on my friend's restored R90S never slipped. So this clutch thing was driving me crazy In frustration, I finally just took it to my dealer. But before that I had inquired of an expert who replied in an all knowing manner that he had told me 10 years ago I had the wrong spring installed, it was for an R75 and R90, not for the higher horsepower R90S; the proper R90S spring ended in part number -035, and even my dealer recently referred me to yet another spring number! I was mystified as to what was going on. So finally Karl Myers took it all apart (thanks Karl!) and the part number stamped on my spring WAS the -035 part number, the correct one. Then he installed a new spring and put it all back together. I have not ridden the bike yet (yea for COVID-19), ?NOT... But now the clutch pull is like it should be, TOO difficult :-) I was spoiled! (Evidently the original part had not been properly heat treated during manufacture.) So very recently I had my dealer install an EZ Clutch, from Bench Mark Works? Part number: acc018 easy soft clutch? This is a device that uses the same principal as when winching in an offroad?4X4 situation; if you run the winch line out to a fixed object, say another vehicle, and run the winch line through a snatch block pulley mounted to that vehicle, see below, and back to the winch, the pulling power is doubled, but the amount of line required to be pulled in, is twice than previously, an acceptable trade off IMO.? See pic below of the EZ clutch installed. SO that is my frustrating tale, and if you want an easier clutch pull, I highly recommend the EZ clutch ?:-) It makes a HUGE difference and actually feels now like only 1/3 of the pressure compared to what was previously required, which would be immensely better say, for city travel with lots of stop and go traffic. Back to being bored....... :-) "After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue ?
|
It exactly doubles force and halfs the stroke. Nothing is for free.
Ride Safe,
Joe
toggle quoted message
Show quoted text
That's interesting! Someone here in Italy says that this device allows
the clutch lever to make only 3/4 of its stroke. It's true?
Thanks for any advice...
Antonio
Il domenica 5 aprile 2020, 01:04:46 CEST, Todd Trumbore via groups.io
<motorrader@...> ha scritto:
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Now you know that?�?s cheating Mac?�?.the original R90S clutch was
designed to be a hand strength training device, come on now!
Oh?�?.,???? If you think that clutch is hard to pull try pulling the
clutch lever on a Benelli Sei six cylinder sometime !
Todd
??
what a great idea. I've noticed how my strength has slipped in my old age!
this may be the solution.
??
Ted Cymbaly
??
On Sat, Apr 4, 2020, 6:03 PM Mac Kirkpatrick, <drbeemer73@...>
wrote:
Ok, a wee bit of a (I'm stuck in my house) story:
??
A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did
the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in
Alabama). I think I posted that pic previously and I have also related
some parts of my R90S resto story in the past.
??
Anyway, after the resto, the clutch lever worked very easily, I was very
surprised at how easy the clutch pulled in, and that had me comparing
clutch pulls on other R90Ss and none of them were near as easy as mine
was. But I was grateful for how easy it was to pull in the clutch even
though the "easiness" of it made no sense.
??
THEN about 6 months ago the clutch started to slip, you know, give it gas
in 5th and the tach starts to spin up uncontrollably. Now this was the 4th
time the clutch had started to slip, two previous times there was too much
lube on the splines, even though I did not think there was, and the clutch
on my friend's restored R90S never slipped. So this clutch thing was
driving me crazy
??
In frustration, I finally just took it to my dealer. But before that I had
inquired of an expert who replied in an all knowing manner that he had
told me 10 years ago I had the wrong spring installed, it was for an R75
and R90, not for the higher horsepower R90S; the proper R90S spring ended
in part number -035, and even my dealer recently referred me to yet
another spring number! I was mystified as to what was going on.
??
So finally Karl Myers took it all apart (thanks Karl!) and the part number
stamped on my spring WAS the -035 part number, the correct one. Then he
installed a new spring and put it all back together. I have not ridden the
bike yet (yea for COVID-19), ??NOT...
??
But now the clutch pull is like it should be, TOO difficult :-) I was
spoiled!
??
(Evidently the original part had not been properly heat treated during
manufacture.)
??
So very recently I had my dealer install an EZ Clutch, from Bench Mark
Works??
Part number: acc018 easy soft clutch??
??
This is a device that uses the same principal as when winching in an
offroad??4X4 situation; if you run the winch line out to a fixed object,
say another vehicle, and run the winch line through a snatch block pulley
mounted to that vehicle, see below, and back to the winch, the pulling
power is doubled, but the amount of line required to be pulled in, is
twice than previously, an acceptable trade off IMO.??
See pic below of the EZ clutch installed.
??
SO that is my frustrating tale, and if you want an easier clutch pull, I
highly recommend the EZ clutch ??:-)
??
It makes a HUGE difference and actually feels now like only 1/3 of the
pressure compared to what was previously required, which would be
immensely better say, for city travel with lots of stop and go traffic.
??
Back to being bored....... :-)
??
??
??
??
??
Mac Kirkpatrick
Glenmoore, PA
??
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
??
| | Virus-free. www.avast.com |
--
Joe Dille
Telford PA
What happens on earth stays on earth
|
Joe of course is absolutely correct, but I was looking at it from the clutch lever's?standpoint :-) and my hand. And make no mistake, Joe IS correct.?
Mac Kirkpatrick Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
On Sat, Apr 4, 2020 at 10:16 PM Joe Dille < joe@...> wrote:
It exactly doubles force and halfs the stroke.? Nothing is for free.
Ride Safe,
Joe
>? That's interesting! Someone here in Italy says that this device allows
> the clutch lever to make only 3/4 of its stroke. It's true?
> Thanks for any advice...
> Antonio
>
>? ? ?Il domenica 5 aprile 2020, 01:04:46 CEST, Todd Trumbore via
> <motorrader=[email protected]> ha scritto:
>
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> Now you know that?�?s cheating Mac?�?.the original R90S clutch was
> designed to be a hand strength training device, come on now!
>
> Oh?�?.,???? If you think that clutch is hard to pull try pulling the
> clutch lever on a Benelli Sei six cylinder sometime !
>
> Todd
>
>? ??
>
> what a great idea. I've noticed how my strength has slipped in my old age!
> this may be the solution.
>
>? ??
>
> Ted Cymbaly
>
>? ??
>
> On Sat, Apr 4, 2020, 6:03 PM Mac Kirkpatrick, <drbeemer73@...>
> wrote:
>
>
> Ok, a wee bit of a (I'm stuck in my house) story:
>
>? ??
>
> A friend, Rob Caso, and I restored two R90Ss about ten years ago, even did
> the paint. See a pic of my bike, attached, (with Todd Trumbore @ Barber in
> Alabama). I think I posted that pic previously and I have also related
> some parts of my R90S resto story in the past.
>
>? ??
>
> Anyway, after the resto, the clutch lever worked very easily, I was very
> surprised at how easy the clutch pulled in, and that had me comparing
> clutch pulls on other R90Ss and none of them were near as easy as mine
> was. But I was grateful for how easy it was to pull in the clutch even
> though the "easiness" of it made no sense.
>
>? ??
>
> THEN about 6 months ago the clutch started to slip, you know, give it gas
> in 5th and the tach starts to spin up uncontrollably. Now this was the 4th
> time the clutch had started to slip, two previous times there was too much
> lube on the splines, even though I did not think there was, and the clutch
> on my friend's restored R90S never slipped. So this clutch thing was
> driving me crazy
>
>? ??
>
> In frustration, I finally just took it to my dealer. But before that I had
> inquired of an expert who replied in an all knowing manner that he had
> told me 10 years ago I had the wrong spring installed, it was for an R75
> and R90, not for the higher horsepower R90S; the proper R90S spring ended
> in part number -035, and even my dealer recently referred me to yet
> another spring number! I was mystified as to what was going on.
>
>? ??
>
> So finally Karl Myers took it all apart (thanks Karl!) and the part number
> stamped on my spring WAS the -035 part number, the correct one. Then he
> installed a new spring and put it all back together. I have not ridden the
> bike yet (yea for COVID-19), ??NOT...
>
>? ??
>
> But now the clutch pull is like it should be, TOO difficult :-) I was
> spoiled!
>
>? ??
>
> (Evidently the original part had not been properly heat treated during
> manufacture.)
>
>? ??
>
> So very recently I had my dealer install an EZ Clutch, from Bench Mark
> Works??
>
>
>
> Part number: acc018 easy soft clutch??
>
>? ??
>
> This is a device that uses the same principal as when winching in an
> offroad??4X4 situation; if you run the winch line out to a fixed object,
> say another vehicle, and run the winch line through a snatch block pulley
> mounted to that vehicle, see below, and back to the winch, the pulling
> power is doubled, but the amount of line required to be pulled in, is
> twice than previously, an acceptable trade off IMO.??
>
> See pic below of the EZ clutch installed.
>
>? ??
>
> SO that is my frustrating tale, and if you want an easier clutch pull, I
> highly recommend the EZ clutch ??:-)
>
>? ??
>
> It makes a HUGE difference and actually feels now like only 1/3 of the
> pressure compared to what was previously required, which would be
> immensely better say, for city travel with lots of stop and go traffic.
>
>? ??
>
> Back to being bored....... :-)
>
>? ??
>
>
>
>
>
>? ??
>
>? ??
>
>? ??
>
>? ??
>
> Mac Kirkpatrick
>
> Glenmoore, PA
>
>? ??
>
> "After all, what is adventure, but inconvenience, properly regarded?"
> C. Donahue
>
>? ??
>
>
>
>
>
> |? | Virus-free. ? |
>
>
>
>
>
>
--
Joe Dille
Telford PA
What happens on earth stays on earth
|
I’ve used this on my 90/S for the last 20 years, bought from a company in Germany called Motoren Israel. Great bit of kit and no problems. Makes ridding a lot more pleasant.
|
Yep….滨 still have one of Chuck's gauge units…with lots of fun little things I added to that gray box, such as my shorting tools, plug extensions and so on, for dual-plugging setups.?? I also have a multi setup….飞辞谤办别诲 well on a Ferrari Daytona a couple years ago.
The "Walus gauge" … was very good decades ago, and is still very good….and is entirely mechanical…and no mercury or alcohol or other 'stuff' to deal with…and that gauge was of high quality.? I had three of them a long time ago, traded off one, sold one, and kept one.?? Everyone in my shop used them.???? We used similar, when I was working in Winkelmann's BMW shop…..that makes me really old, I guess, since while I was there, the R75/5 came out,…..and BMWNA did not exist……it was B & S and Flanders, …me racing a lot……and then….oh, well, cabin fever tonight.
The Walus gauge is still what I prefer for twin plugged Airheads; and I prefer the shorting method via screwdrivers for the stock plugs setup, although certainly have/do use the Walus.
Walus made quite a few things, including the battery box items for the /5…and the in-situ greasing tool for the wheel bearings…which works well enough, if one is careful in its use. Ah…memories…. I hear strains of…."….迟丑别 way we were…".
Snowbum ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Richard Chawes2
Sent: Saturday, April 04, 2020 4:41 PM
To: [email protected]
Subject: Re: [R90SWORLDNET] EZ Clutch Story + R90S With Mac Kirkpatrick & Todd Trumbore: Barber Motorsports, 2018? Not that it really matters but that clutch assist mechanism was invented many, many years before Benchmark even existed by (if I can recall correctly) Wallus Engineering who also sold a Dual Carb balancing unit based on the Dwyer Magnehelic gauge. I still have one or two of the original ones sitting around. ?They are great. ?You can also measure the thickness of the clutch springs for relative strengths. ?It is possible the spring was fine but just labeled wrong. I would think a non heat treated spring would have cracked fingers or would have deformed them instantly, not ten years later. Just a guess. Richard Chawes
<snip rest> -- Robert (Snowbum) Fleischer, Carson City, NV, USA
ABC 1843; MOA Life 17058; AMA Charter Life 73254; USCA 6504…..
?(???)?
|
Thank you Mac! I have found on the net a simple comparison between linear traction and traction with a pulley, which is similar to the one we are talking about. In my humble opinion, as you can see on the enclosed pic, half the effort means half the movement of the lever (see figure 2): to move 10 cm you would have to pull 20 cm, but you don't... which, translated on the bike, it means that you are always at the limit in order not to declutch or to slip... Am I wrong?
(sorry for my poor english, I hope I have explained quite well my point of view...)
Ciao to all of you!
Antonio
Il domenica 5 aprile 2020, 12:51:22 CEST, Robert Fleischer dba Fleischer's Service <snowbum@...> ha scritto:
Yep….滨 still have one of Chuck's gauge units…with lots of fun little things I added to that gray box, such as my shorting tools, plug extensions and so on, for dual-plugging setups.?? I also have a multi setup….飞辞谤办别诲 well on a Ferrari Daytona a couple years ago.
The "Walus gauge" … was very good decades ago, and is still very good….and is entirely mechanical…and no mercury or alcohol or other 'stuff' to deal with…and that gauge was of high quality.? I had three of them a long time ago, traded off one, sold one, and kept one.?? Everyone in my shop used them.???? We used similar, when I was working in Winkelmann's BMW shop…..that makes me really old, I guess, since while I was there, the R75/5 came out,…..and BMWNA did not exist……it was B & S and Flanders, …me racing a lot……and then….oh, well, cabin fever tonight.
The Walus gauge is still what I prefer for twin plugged Airheads; and I prefer the shorting method via screwdrivers for the stock plugs setup, although certainly have/do use the Walus.
Walus made quite a few things, including the battery box items for the /5…and the in-situ greasing tool for the wheel bearings…which works well enough, if one is careful in its use. Ah…memories…. I hear strains of…."….迟丑别 way we were…".
Snowbum ?
From: [email protected] <[email protected]> On Behalf Of Richard Chawes2
Sent: Saturday, April 04, 2020 4:41 PM
To: [email protected]
Subject: Re: [R90SWORLDNET] EZ Clutch Story + R90S With Mac Kirkpatrick & Todd Trumbore: Barber Motorsports, 2018 ? Not that it really matters but that clutch assist mechanism was invented many, many years before Benchmark even existed by (if I can recall correctly) Wallus Engineering who also sold a Dual Carb balancing unit based on the Dwyer Magnehelic gauge. I still have one or two of the original ones sitting around. ?They are great. ?You can also measure the thickness of the clutch springs for relative strengths. ?It is possible the spring was fine but just labeled wrong. I would think a non heat treated spring would have cracked fingers or would have deformed them instantly, not ten years later. Just a guess. Richard Chawes
<snip rest> -- Robert (Snowbum) Fleischer, Carson City, NV, USA
ABC 1843; MOA Life 17058; AMA Charter Life 73254; USCA 6504…..
?(???)?
|
I like these solved historical, longstanding mechanical mysteries, kinda like a crime mystery.? I have one regarding my '67 R60. Maybe I'll put to pen. Until then, maybe others will add theirs...?
|
Mac, Let us know if it?works for you. I installed an ezclutch in the 75 R90S that I brought to the 2014 anniversary rally and the bike was difficult to shift. I eventually removed it because I don't think it totally disengaged the clutch between shifts. I tried adjusting the arm and still couldn't get it to work??
On Sun, Apr 5, 2020, 9:00 AM Martin Johnson < Dermodad@...> wrote: I like these solved historical, longstanding mechanical mysteries, kinda like a crime mystery.? I have one regarding my '67 R60. Maybe I'll put to pen. Until then, maybe others will add theirs...?
|
Maybe the cable length wasn’t cut to correct length, or just not adjusted right. I’ve had one on my R90s for 20 years now and never had to touch it. A few years back, someone in the R90s Sport Owners Club made up of his own design, based on extending the lever
arm. I put that one on my other bike, it works well too with the advantage of not needing to cut the cable.
toggle quoted message
Show quoted text
On 5 Apr 2020, at 19:28, Steve <stowne482@...> wrote:
?
Mac, Let us know if it?works for you. I installed an ezclutch in the 75 R90S that I brought to the 2014 anniversary rally and the bike was difficult to shift. I eventually removed it because I don't think it totally disengaged the clutch between
shifts. I tried adjusting the arm and still couldn't get it to work??
On Sun, Apr 5, 2020, 9:00 AM Martin Johnson < Dermodad@...> wrote:
I like these solved historical, longstanding mechanical mysteries, kinda like a crime mystery.? I have one regarding my '67 R60. Maybe I'll put to pen. Until then, maybe others will add theirs...?
|
I did try several different clutch adjustments but couldn't seem to get it to disengage enough to facilitate a smooth shift without extra footwork.?
On Sun, Apr 5, 2020, 1:38 PM Kirk Ratzel < eur90s@...> wrote:
Maybe the cable length wasn’t cut to correct length, or just not adjusted right. I’ve had one on my R90s for 20 years now and never had to touch it. A few years back, someone in the R90s Sport Owners Club made up of his own design, based on extending the lever
arm. I put that one on my other bike, it works well too with the advantage of not needing to cut the cable.
Kirk
?
Mac, Let us know if it?works for you. I installed an ezclutch in the 75 R90S that I brought to the 2014 anniversary rally and the bike was difficult to shift. I eventually removed it because I don't think it totally disengaged the clutch between
shifts. I tried adjusting the arm and still couldn't get it to work??
On Sun, Apr 5, 2020, 9:00 AM Martin Johnson < Dermodad@...> wrote:
I like these solved historical, longstanding mechanical mysteries, kinda like a crime mystery.? I have one regarding my '67 R60. Maybe I'll put to pen. Until then, maybe others will add theirs...?
|
That’s really odd, because the lever pull is essentially divided in two. So, I find it easier to adjust, but also easier to go out of adjustment with normal wear.
toggle quoted message
Show quoted text
On 7 Apr 2020, at 14:58, Steve <stowne482@...> wrote:
?
I did try several different clutch adjustments but couldn't seem to get it to disengage enough to facilitate a smooth shift without extra footwork.?
On Sun, Apr 5, 2020, 1:38 PM Kirk Ratzel < eur90s@...> wrote:
Maybe the cable length wasn’t cut to correct length, or just not adjusted right. I’ve had one on my R90s for 20 years now and never had to touch it. A few years back, someone in the R90s Sport Owners Club made up of his own design, based on
extending the lever arm. I put that one on my other bike, it works well too with the advantage of not needing to cut the cable.
Kirk
?
Mac, Let us know if it?works for you. I installed an ezclutch in the 75 R90S that I brought to the 2014 anniversary rally and the bike was difficult to shift. I eventually removed it because I don't think it totally disengaged the clutch between
shifts. I tried adjusting the arm and still couldn't get it to work??
On Sun, Apr 5, 2020, 9:00 AM Martin Johnson < Dermodad@...> wrote:
I like these solved historical, longstanding mechanical mysteries, kinda like a crime mystery.? I have one regarding my '67 R60. Maybe I'll put to pen. Until then, maybe others will add theirs...?
|
Nick Ploeg
Martin Cole
Martin Johnson
Steve