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Dellorto Float Bowl Nut - Leaking after Check
As part of a diagnostic from my other thread, I pulled the float bowls to see if there was any unexpected bits. The good news is there was not.
When I removed the 17mm nut there was an aluminum crush washer - the same as the one used on the engine oil drain plug, being used as a washer. The Dellorto rebuild kit I have has the fiber washers, so I used those to reseal the nut. However, both float bowl nuts are now leaking. I checked to confirm the leak was not coming from the top of the float bowl.
Question, what torque value should be used to tighten this nut? I have it as tight as I feel comfortable going. My worry is if I go tighter it will strip. Should I be switching to the aluminum washers? Would Hylomar Blue be a good option for these, or is there another recommendation?
Thanks,
Scott
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Re: Bad Stumble below 3000 RPM after Brief Stop
Finally got some time to look at the bike. I pulled both plug leads an did a quick check. Both leads were showing next to "0" resistance. I bent and folded the leads while checking to see if there was an issue i.e. change in the reading, and there wasn't.
The 1K plug caps showed LH: 970 and RH: 1030.
I checked both coils as well:
LH - Primary: 1.1 - 1.2, Secondary: 12.3
RH - Primary: 1.1 - 1.2, Secondary 12.85
I will order new leads from Euro Motoelectrics with the 5K Caps, as I've read they are a good way to go. I'm also looking at getting the Digital Ignition System they offer. Not sure if this is a good upgrade or not, but I have a similar optical type in my R69S and it's been great.
With being in Canada and Covid, it will be a bit befor the new plug leads arrive, but I'll update when they get here.
Scott.
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Re: Bad Stumble below 3000 RPM after Brief Stop
Scott ? I'm assuming if I check the resistance in the HT lead I'd see the issue----most definitely, it is quite concerning to see a spark arching against the petrol tank. ? Kirk it turned out to be the simplest of issues------isn¡¯t that always the case. LOL ? Frank Down Under ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Scott Blaylock via groups.io
Sent: Friday, 31 July 2020 1:41 AM
To: [email protected]
Subject: Re: [R90SWORLDNET] Bad Stumble below 3000 RPM after Brief Stop ? I confirmed the bike does have the 400W upgrade, which was done in 2006 with the DYNA III.
I pulled the float bowls last night and both were clean. Checked the float action and confirmed the needle was moving up and down as it should.The nut that holds the float bowl had aluminum washers - identical to ones on the drain plugs. The one on the RH side was leaking, so I replaced both with the fiber ones that I had in the rebuild kit and that seemed to fix the leak.
Pulled the bike out and it fired right up and ran smooth at idle. I don't think pulling the float bowls fixed anything as it ran fine to Chevron station, then stumbled after the fill-up. I'm hoping to take it for a spin tonight after work and see if I can recreate the issue.
Frank, I'm assuming if I check the resistance in the HT lead I'd see the issue, if that is the problem. That said, I'll do the night check in my garage and see if I get an arc between the lead and the case, tank or something else. It looks like someone has put a piece of fuel line over the HT lead where it passes by the fuel tank and case as an attempt to solve this issue (see attached).
Thanks for the help,
Scott??
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Re: Bad Stumble below 3000 RPM after Brief Stop
With similar symptoms, I was recently embarrassed to discover a poorly adjusted enricher cable on one side - just slightly sticking open. But it made for the worst running at 2000-2500 rpm and huge unsynchronization ?of the the card balance. Of course after chasing ignition coils, HT leads, faulty grounds, worn needle jets, etc. it turned out to be the simplest of issues.
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On 30 Jul 2020, at 19:08, OLD BMWS via groups.io <oldbmws@...> wrote:
?
Original R90/S & R90/6 spark plug leads have an additional insulator that looks like a section of fuel line on them. Do your spark plug wires have this additional insulation on them?
Ted
On Thursday, July 30, 2020, 11:58:22 AM EDT, Todd Trumbore via groups.io <motorrader@...> wrote:
It could very well be that you have bad ignition wires.? Sometimes it is hard to spot fine cracking of the insulated wiring. ?The fact that these wires are as old as they are, leads me to suspect them as the culprit.? I¡¯d at least investigate the wires from the coil to the plugs. Todd
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Re: Bad Stumble below 3000 RPM after Brief Stop
Original R90/S & R90/6 spark plug leads have an additional insulator that looks like a section of fuel line on them. Do your spark plug wires have this additional insulation on them?
Ted
On Thursday, July 30, 2020, 11:58:22 AM EDT, Todd Trumbore via groups.io <motorrader@...> wrote:
It could very well be that you have bad ignition wires.? Sometimes it is hard to spot fine cracking of the insulated wiring. ?The fact that these wires are as old as they are, leads me to suspect them as the culprit.? I¡¯d at least investigate the wires from the coil to the plugs. Todd
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Re: Bad Stumble below 3000 RPM after Brief Stop
It could very well be that you have bad ignition wires.? Sometimes it is hard to spot fine cracking of the insulated wiring. ?The fact that these wires are as old as they are, leads me to suspect them as the culprit.? I¡¯d at least investigate the wires from the coil to the plugs. Todd ? ? ? I confirmed the bike does have the 400W upgrade, which was done in 2006 with the DYNA III.
I pulled the float bowls last night and both were clean. Checked the float action and confirmed the needle was moving up and down as it should.The nut that holds the float bowl had aluminum washers - identical to ones on the drain plugs. The one on the RH side was leaking, so I replaced both with the fiber ones that I had in the rebuild kit and that seemed to fix the leak.
Pulled the bike out and it fired right up and ran smooth at idle. I don't think pulling the float bowls fixed anything as it ran fine to Chevron station, then stumbled after the fill-up. I'm hoping to take it for a spin tonight after work and see if I can recreate the issue.
Frank, I'm assuming if I check the resistance in the HT lead I'd see the issue, if that is the problem. That said, I'll do the night check in my garage and see if I get an arc between the lead and the case, tank or something else. It looks like someone has put a piece of fuel line over the HT lead where it passes by the fuel tank and case as an attempt to solve this issue (see attached).
Thanks for the help,
Scott??
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Re: Bad Stumble below 3000 RPM after Brief Stop
I confirmed the bike does have the 400W upgrade, which was done in 2006 with the DYNA III.
I pulled the float bowls last night and both were clean. Checked the float action and confirmed the needle was moving up and down as it should.The nut that holds the float bowl had aluminum washers - identical to ones on the drain plugs. The one on the RH side was leaking, so I replaced both with the fiber ones that I had in the rebuild kit and that seemed to fix the leak.
Pulled the bike out and it fired right up and ran smooth at idle. I don't think pulling the float bowls fixed anything as it ran fine to Chevron station, then stumbled after the fill-up. I'm hoping to take it for a spin tonight after work and see if I can recreate the issue.
Frank, I'm assuming if I check the resistance in the HT lead I'd see the issue, if that is the problem. That said, I'll do the night check in my garage and see if I get an arc between the lead and the case, tank or something else. It looks like someone has put a piece of fuel line over the HT lead where it passes by the fuel tank and case as an attempt to solve this issue (see attached).
Thanks for the help,
Scott??
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Don't take it literally,? its an engine model! The colours I presume are for illustration purposes only
Sent from my Samsung Galaxy smartphone.
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-------- Original message -------- From: Joe Dille <joe@...> Date: 30/07/2020 13:38 (GMT+00:00) Subject: Re: [R90SWORLDNET] Pretty Cool Model
That is very cool, but how can it be 1973 with Daytona Orange??? > Pretty cool engine model > https://www.amazon.com/BMW-Airhead-Engine-Collectors-Manual/dp/B07LDC9MJW > > > Mac Kirkpatrick > Glenmoore, PA > > "After all, what is adventure, but inconvenience, properly regarded?" > C. Donahue > > > > -- Joe Dille Telford PA http://home.jtan.com/~joe/joe.htm What happens on earth stays on earth
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Don't take it literally,? its an engine model! The colours I presume are for illustration purposes only
Sent from my Samsung Galaxy smartphone.
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Show quoted text
-------- Original message -------- From: Joe Dille <joe@...> Date: 30/07/2020 13:38 (GMT+00:00) Subject: Re: [R90SWORLDNET] Pretty Cool Model
That is very cool, but how can it be 1973 with Daytona Orange??? > Pretty cool engine model > https://www.amazon.com/BMW-Airhead-Engine-Collectors-Manual/dp/B07LDC9MJW > > > Mac Kirkpatrick > Glenmoore, PA > > "After all, what is adventure, but inconvenience, properly regarded?" > C. Donahue > > > > -- Joe Dille Telford PA http://home.jtan.com/~joe/joe.htm What happens on earth stays on earth
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Joe, it's magic :-)
Marketing.
Mac Kirkpatrick Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
On Thu, Jul 30, 2020 at 8:38 AM Joe Dille < joe@...> wrote: That is very cool, but how can it be 1973 with Daytona Orange???
> Pretty cool engine model
>
>
>
> Mac Kirkpatrick
> Glenmoore, PA
>
> "After all, what is adventure, but inconvenience, properly regarded?"
> C. Donahue
>
>
>
>
--
Joe Dille
Telford PA
What happens on earth stays on earth
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That is very cool, but how can it be 1973 with Daytona Orange???
toggle quoted message
Show quoted text
Pretty cool engine model
Mac Kirkpatrick
Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
--
Joe Dille
Telford PA
What happens on earth stays on earth
|
Pretty cool engine model
Mac Kirkpatrick Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
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Locked
Re: Bad Stumble below 3000 RPM after Brief Stop
Decades ago my R65LS exhibited similar behaviour. I carried out the
following test. At night, in a practically darkened garage I fired up the
bike and looked at the petrol tank/hi- tension leads. The right lead clearly
was sparking against the metal tank, meaning a 'leak', the spark was being
diverted. At higher revs the spark was overcoming the 'detour' and continued
towards the spark plug. Replacement of the leads eliminated the problem.
Frank
Down Under
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Richard Chawes2 Sent: Thursday, 30 July 2020 4:50 AM To: [email protected]Subject: Re: [R90SWORLDNET] Bad Stumble below 3000 RPM after Brief Stop Maybe take your float bowls off and see if any water or particles floating around. Since it ran so good first time I doubt it is ignition related, sounds like fuel Richard Chawes On Jul 29, 2020, at 11:39 AM, Joe Dille <joe@...> wrote:
Scott,
I can't say about your ignition or charging system. However, one
thing that would be helpful would be to know is the if bike is running
on 1 or 2 cylinders. The best way is to use an IR temperature gun.
Measure on the bare aluminum, perhaps the exhaust nuts in the same
place. Plan B would be to just feel how hot the valve covers are.
If it is running on 1 cylinder then the Dyna III is the culprit.
Let us know how you make out.
Joe
This is a new to me 74 R90S with a DYNA III Electronic Ignition and,
I believe, the upgraded 450 Watt charging system. Again, this bike is
new to me, but I have attached photos so maybe the trained eye can
confirm.
As was mentioned in my previous thread, the bike had been sitting for
a very long time on a dealership floor as a show piece. I drained all
the fluids, added a bit of oil to the cylinders (thanks Richard),
grounded the plugs and cranked it until the oil pressure light went
out. Put the plugs back in, drained the old fuel, replaced it with 5
litres of Chevron Ultra 94, started it and ran it until the smoke
cleared. Took the bike for a quick 2 mile drive and was impressed
with how tight the bike felt - WOW was all I could say when I got home.
This morning I took the bike out for a 4 or so mile run and it ran
perfectly. Idled perfectly at stop lights and ran incredibly smooth.
I stopped at a Chevron to fill the fuel tank, again Ultra 94. The
bike started without the enrichener but didn't want to idle. The
charge light seemed to stay on until I brought the RPM above 2000. I
pulled away and it seemed to stumble a little bit and the Volt meter
showed a discharge until I brought the RPM above 3000. As I continued
to drive the stumble got worse. I engaged the enrichener to see if
for some reason it opened, even though I hadn't touched it at the gas
station, but it made the stumble worse. As I drove more it got worse
and I needed to keep the RPM above
2500 for the bike to stay running. This reminded me of when the coil
on my R69S was packing it in, but in that instance it totally died
after a mile or so. I was able to limp the bike all the way home but
it died in the driveway as soon as I rolled the throttle off. As I'm
at the office, I haven't tried to start it again, so I can't say if
it's a heat soak issue, or now a constant low RPM stumble. I can check
that when I get home.
Any ideas on where to start?
Thanks,
Scott.
--
Joe Dille
Telford PA
What happens on earth stays on earth
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Re: Bad Stumble below 3000 RPM after Brief Stop
Maybe take your float bowls off and see if any water or particles floating around. Since it ran so good first time I doubt it is ignition related, sounds like fuel
Richard Chawes
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Show quoted text
On Jul 29, 2020, at 11:39 AM, Joe Dille <joe@...> wrote:
Scott,
I can't say about your ignition or charging system. However, one thing
that would be helpful would be to know is the if bike is running on 1 or 2
cylinders. The best way is to use an IR temperature gun. Measure on the
bare aluminum, perhaps the exhaust nuts in the same place. Plan B would
be to just feel how hot the valve covers are.
If it is running on 1 cylinder then the Dyna III is the culprit.
Let us know how you make out.
Joe
This is a new to me 74 R90S with a DYNA III Electronic Ignition and, I
believe, the upgraded 450 Watt charging system. Again, this bike is new to
me, but I have attached photos so maybe the trained eye can confirm.
As was mentioned in my previous thread, the bike had been sitting for a
very long time on a dealership floor as a show piece. I drained all the
fluids, added a bit of oil to the cylinders (thanks Richard), grounded the
plugs and cranked it until the oil pressure light went out. Put the plugs
back in, drained the old fuel, replaced it with 5 litres of Chevron Ultra
94, started it and ran it until the smoke cleared. Took the bike for a
quick 2 mile drive and was impressed with how tight the bike felt - WOW
was all I could say when I got home.
This morning I took the bike out for a 4 or so mile run and it ran
perfectly. Idled perfectly at stop lights and ran incredibly smooth. I
stopped at a Chevron to fill the fuel tank, again Ultra 94. The bike
started without the enrichener but didn't want to idle. The charge light
seemed to stay on until I brought the RPM above 2000. I pulled away and it
seemed to stumble a little bit and the Volt meter showed a discharge until
I brought the RPM above 3000. As I continued to drive the stumble got
worse. I engaged the enrichener to see if for some reason it opened, even
though I hadn't touched it at the gas station, but it made the stumble
worse. As I drove more it got worse and I needed to keep the RPM above
2500 for the bike to stay running. This reminded me of when the coil on my
R69S was packing it in, but in that instance it totally died after a mile
or so. I was able to limp the bike all the way home but it died in the
driveway as soon as I rolled the throttle off. As I'm at the office, I
haven't tried to start it again, so I can't say if it's a heat soak issue,
or now a constant low RPM stumble. I can check that when I get home.
Any ideas on where to start?
Thanks,
Scott.
--
Joe Dille
Telford PA
What happens on earth stays on earth
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Re: Bad Stumble below 3000 RPM after Brief Stop
Hi Joe,
Once it was above 3000 rpm it seemed to smooth out a bit and seemed to be running on both. Running on one I would expect a pretty good shake as well, which I didn't have.
I had the odd backfire as well.
Thanks,
Scott.
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Re: Bad Stumble below 3000 RPM after Brief Stop
Scott,
I can't say about your ignition or charging system. However, one thing
that would be helpful would be to know is the if bike is running on 1 or 2
cylinders. The best way is to use an IR temperature gun. Measure on the
bare aluminum, perhaps the exhaust nuts in the same place. Plan B would
be to just feel how hot the valve covers are.
If it is running on 1 cylinder then the Dyna III is the culprit.
Let us know how you make out.
Joe
toggle quoted message
Show quoted text
This is a new to me 74 R90S with a DYNA III Electronic Ignition and, I
believe, the upgraded 450 Watt charging system. Again, this bike is new to
me, but I have attached photos so maybe the trained eye can confirm.
As was mentioned in my previous thread, the bike had been sitting for a
very long time on a dealership floor as a show piece. I drained all the
fluids, added a bit of oil to the cylinders (thanks Richard), grounded the
plugs and cranked it until the oil pressure light went out. Put the plugs
back in, drained the old fuel, replaced it with 5 litres of Chevron Ultra
94, started it and ran it until the smoke cleared. Took the bike for a
quick 2 mile drive and was impressed with how tight the bike felt - WOW
was all I could say when I got home.
This morning I took the bike out for a 4 or so mile run and it ran
perfectly. Idled perfectly at stop lights and ran incredibly smooth. I
stopped at a Chevron to fill the fuel tank, again Ultra 94. The bike
started without the enrichener but didn't want to idle. The charge light
seemed to stay on until I brought the RPM above 2000. I pulled away and it
seemed to stumble a little bit and the Volt meter showed a discharge until
I brought the RPM above 3000. As I continued to drive the stumble got
worse. I engaged the enrichener to see if for some reason it opened, even
though I hadn't touched it at the gas station, but it made the stumble
worse. As I drove more it got worse and I needed to keep the RPM above
2500 for the bike to stay running. This reminded me of when the coil on my
R69S was packing it in, but in that instance it totally died after a mile
or so. I was able to limp the bike all the way home but it died in the
driveway as soon as I rolled the throttle off. As I'm at the office, I
haven't tried to start it again, so I can't say if it's a heat soak issue,
or now a constant low RPM stumble. I can check that when I get home.
Any ideas on where to start?
Thanks,
Scott.
--
Joe Dille
Telford PA
What happens on earth stays on earth
|
Locked
Bad Stumble below 3000 RPM after Brief Stop
This is a new to me 74 R90S with a DYNA III Electronic Ignition and, I believe, the upgraded 450 Watt charging system. Again, this bike is new to me, but I have attached photos so maybe the trained eye can confirm.
As was mentioned in my previous thread, the bike had been sitting for a very long time on a dealership floor as a show piece. I drained all the fluids, added a bit of oil to the cylinders (thanks Richard), grounded the plugs and cranked it until the oil pressure light went out. Put the plugs back in, drained the old fuel, replaced it with 5 litres of Chevron Ultra 94, started it and ran it until the smoke cleared. Took the bike for a quick 2 mile drive and was impressed with how tight the bike felt - WOW was all I could say when I got home.
This morning I took the bike out for a 4 or so mile run and it ran perfectly. Idled perfectly at stop lights and ran incredibly smooth. I stopped at a Chevron to fill the fuel tank, again Ultra 94. The bike started without the enrichener but didn't want to idle. The charge light seemed to stay on until I brought the RPM above 2000. I pulled away and it seemed to stumble a little bit and the Volt meter showed a discharge until I brought the RPM above 3000. As I continued to drive the stumble got worse. I engaged the enrichener to see if for some reason it opened, even though I hadn't touched it at the gas station, but it made the stumble worse. As I drove more it got worse and I needed to keep the RPM above 2500 for the bike to stay running. This reminded me of when the coil on my R69S was packing it in, but in that instance it totally died after a mile or so. I was able to limp the bike all the way home but it died in the driveway as soon as I rolled the throttle off. As I'm at the office, I haven't tried to start it again, so I can't say if it's a heat soak issue, or now a constant low RPM stumble. I can check that when I get home.
Any ideas on where to start??
Thanks,
Scott.
? ? ? ?
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Re: Replacement Rear Shocks
I cannot say enough good things about Roger at Ikon USA.? He spend an inordinate amount of time with me in selecting the correct springs for my R90S.? The guy knows his stuff. No skin in the game, just a very satisfied customer.
IkonSuspensionUSA.com
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Re: Replacement Rear Shocks
I have a shock compressor and will offer it to anyone needing to rebuild if they want to stop by. I used it to install new shrouds on my R90S Konis and didn't take long. Steve in NH
On Mon, Jul 27, 2020, 6:03 PM Todd Trumbore via <motorrader= [email protected]> wrote: Yes, that can certainly be done.? I¡¯ve done that quite a few times.?? Helps to have a shock compressor, but you can easily make one.? Polish up those old shock covers and they will look like new. Todd ? ? Stock 75 R90S SS. Looks like I am going to need a pair of shocks. Friends have suggested YSS, Hagon, Ikon. This is a nice daily rider, close but not a show bike. Would like good performance and possibly the option to install the stock shock cover to present the illusion of stock. I find multiple options in those brands online.? Wanting some specific suggestions/model numbers based on experience. THANKS!!!!!!?
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See
Mac Kirkpatrick Glenmoore, PA
"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
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Scott Blaylock
Frank ---Down Under
Steve