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Locked Cold running

 

A few days ago Steve Ross, when inquiring about the choke lever said "?It looked to me like the lever is supposed to be kept open by friction so one can ride away while the engine is still cold". ?I'm curious, do members ride away with a cold engine??

In my case, whilst looking at the oil pressure light, depress the start button (if the light doesn't go out within 2 seconds I switch off the engine.)

I hold the throttle at around 12-1400 revs, run the engine for around 20 seconds before switching off the choke. I continue to feather the throttle at those revs and gradually increase to 15-1700revs with a brief spin to get the alternator light to go out and check the voltmeter. Within a minute of starting, the engine is idling unaided, put on helmet and gloves and ride away. After a few kilometres at around 27-3000 revs the engine, gearbox, shaft and diff oil has reach operating temperature.

Mechanical sympathy tells me never to ride off with the choke on and a cold engine. Anyone else agree with me????????

What¡¯s your cold start procedure?

 

Frank, how I ride off depends on the ambient temperature, and the settings and habits of the particular machine I am on as each is different.?
I do ride off with?the choke still on in many cases, otherwise the bike may not keep running, but as I said, it depends on the temperature and the bike. As soon as I feel the bike does not need the choke any longer, I turn it off.

And feathering of the throttle on a bike with Dellortos shoots gas into the engine as it has accelerator pumps, other bikes may have Bings and no such pumps.

It's kind of like a gun, even if you have two identical guns, one may shoot better with X brand ammo versus the other which may shoot better with Y ammo.?

I think it's whatever works, as long as the choke is turned off as soon as possible.


Mac Kirkpatrick
Glenmoore, PA

"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue


On Wed, Jun 10, 2020 at 6:28 AM Frank ---Down Under <r90s@...> wrote:
A few days ago Steve Ross, when inquiring about the choke lever said "?It looked to me like the lever is supposed to be kept open by friction so one can ride away while the engine is still cold". ?I'm curious, do members ride away with a cold engine??

In my case, whilst looking at the oil pressure light, depress the start button (if the light doesn't go out within 2 seconds I switch off the engine.)

I hold the throttle at around 12-1400 revs, run the engine for around 20 seconds before switching off the choke. I continue to feather the throttle at those revs and gradually increase to 15-1700revs with a brief spin to get the alternator light to go out and check the voltmeter. Within a minute of starting, the engine is idling unaided, put on helmet and gloves and ride away. After a few kilometres at around 27-3000 revs the engine, gearbox, shaft and diff oil has reach operating temperature.

Mechanical sympathy tells me never to ride off with the choke on and a cold engine. Anyone else agree with me????????

What¡¯s your cold start procedure?

 

¿ªÔÆÌåÓý

I start me R90S with the choke (enrichener) full on, make sure the oil & charging lights are off, take the bike off the center stand and ride off. Once I¡¯m out of the driveway, I usually take off the choke within a couple of hundred feet and Bob¡¯s your uncle.

Gentle riding with the choke on is a perfectly reasonable way to warm up the bike and should be no worse for the bike than warming up while stationary.

Bill in NH

On Jun 10, 2020, at 6:28 AM, Frank ---Down Under <r90s@...> wrote:

A few days ago Steve Ross, when inquiring about the choke lever said "?It looked to me like the lever is supposed to be kept open by friction so one can ride away while the engine is still cold". ?I'm curious, do members ride away with a cold engine??
In my case, whilst looking at the oil pressure light, depress the start button (if the light doesn't go out within 2 seconds I switch off the engine.)
I hold the throttle at around 12-1400 revs, run the engine for around 20 seconds before switching off the choke. I continue to feather the throttle at those revs and gradually increase to 15-1700revs with a brief spin to get the alternator light to go out and check the voltmeter. Within a minute of starting, the engine is idling unaided, put on helmet and gloves and ride away. After a few kilometres at around 27-3000 revs the engine, gearbox, shaft and diff oil has reach operating temperature.
Mechanical sympathy tells me never to ride off with the choke on and a cold engine. Anyone else agree with me????????
What¡¯s your cold start procedure?

 

Mac,

That is the truth. Mine needs the choke to start, but does not want
anything to do with it once it is running. When it is cold, I can leave
it on for 20-30 sec. When it is warm out (engine cold) I have to take the
choke off almost immediately 3-5 sec. What works, works.

Ride Safe,

Joe

Frank, how I ride off depends on the ambient temperature, and the settings
and habits of the particular machine I am on as each is different.
I do ride off with the choke still on in many cases, otherwise the bike
may
not keep running, but as I said, it depends on the temperature and the
bike. As soon as I feel the bike does not need the choke any longer, I
turn
it off.

And feathering of the throttle on a bike with Dellortos shoots gas into
the
engine as it has accelerator pumps, other bikes may have Bings and no such
pumps.

It's kind of like a gun, even if you have two identical guns, one may
shoot
better with X brand ammo versus the other which may shoot better with Y
ammo.

I think it's whatever works, as long as the choke is turned off as soon as
possible.


Mac Kirkpatrick
Glenmoore, PA

"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue


On Wed, Jun 10, 2020 at 6:28 AM Frank ---Down Under <r90s@...>
wrote:

A few days ago Steve Ross, when inquiring about the choke lever said "
*It
looked to me like the lever is supposed to be kept open by friction so
one
can ride away while the engine is still cold". * I'm curious, do members
ride away with a cold engine??

In my case, whilst looking at the oil pressure light, depress the start
button (if the light doesn't go out within 2 seconds I switch off the
engine.)

I hold the throttle at around 12-1400 revs, run the engine for around 20
seconds before switching off the choke. I continue to feather the
throttle
at those revs and gradually increase to 15-1700revs with a brief spin to
get the alternator light to go out and check the voltmeter. Within a
minute
of starting, the engine is idling unaided, put on helmet and gloves and
ride away. After a few kilometres at around 27-3000 revs the engine,
gearbox, shaft and diff oil has reach operating temperature.

Mechanical sympathy tells me never to ride off with the choke on and a
cold engine. Anyone else agree with me??

What?€?s your cold start procedure?




--
Joe Dille
Telford PA


What happens on earth stays on earth
 

I was taught from an early age to get the vehicle moving to speed the warm-up process.? Having said that, I also learned to ride/drive gently? until the coolant (if applicable), and more importantly, the oil temperature were at safe operating parameters.? Sadly, most vehicles are not equipped with oil temperature gauges.

Also, to update you all on my travails with my choke lever,? Lars Hens was kind enough to remind me to check the tightness of the nut inside the air box.? The nut was indeed tight.? However, the screw itself was not tight enough.? After tightening the screw and then the nut the lever operated as designed.? This is one of many reasons why I don't repair cars and motorcycles for a living.? I'd starve.

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