Topic: New 836cc build...white smoke

[Sweep]

Good point by Jay. Don't think I've seen that addressed before.

Wouldn't it be nice if you put a few miles on it, the rings seated, and it quit smoking?! Hope you're not just jumping the gun. Don't baby it too much during breakin or you might glaze the cylinder walls and the rings will never seat. That requires another tear down and cylinder hone. If this happens at least you will be able to check that your rings are installed correctly.

I'll provide an update after my ride today.  I hope I am jumping the gun. 

[Sweep]

Well I took the ride and things didn't go well.  I narrowed it down to the carbs because the plugs were a mess and I was a babe in the woods when I bench tuned these carbs.  I had the needles set on the 2nd to last notches rather than the 2nd from the top duh.  This was my big problem.  I ended up backing timing off a bit and taking the main jets from 125 to 115 as well.

The second ride went way better but I couldn't do much due to only having a semi-working front brake (I know I know I'll get to these next).  The motor seems to sputter at 4000rpm or so and I'm thinking I need to work with the main jet a bit.  Right now I don't have the muffler on and I'm running velocity stacks, not sure if 115 is right for me this second.  Anyway it was a good day and now I need a way to sychronize the carbs.  I know how to do it and I've been putting it off, I think the carbs are in need of it right now to get a stronger idle but again I'm not sure.

[andy750]

And what about the white smoke? Did it disappear during the ride?

cheers
Andy

[Sweep]

And what about the white smoke? Did it disappear during the ride?

cheers
Andy

It's vastly reduced but I can still "see" the exhaust.  I probably have more to burn off but I don't seem to have any pressure problems that I can see and the bike does idle now.

[scondon]

  Yippee, CR carb tuning. Glad I'm not the only poor sod having to tackle it this year   Do yourself a favor and put on whatever muffler you intend to run before doing the fine tuning. The transitions between 1/4-1/2-3/4-Full throttle took me some time to sort out and a change in exhaust backpressure meant a little fiddling with needles and idle mixture.

    I did have steady white smoke when decellerating from full throttle when I first got my 836 running, due to rich gas mixture(has since disappeared). Also, a bit of oil consumption for first 500 miles or so until rings were well seated. Heavy white smoke that lingers in the air would not be good, but I've had that little white haze that disapates about 5 feet behind the bike when sorting out tuning on a fresh engine.

[Sweep]

  Yippee, CR carb tuning. Glad I'm not the only poor sod having to tackle it this year   Do yourself a favor and put on whatever muffler you intend to run before doing the fine tuning. The transitions between 1/4-1/2-3/4-Full throttle took me some time to sort out and a change in exhaust backpressure meant a little fiddling with needles and idle mixture.

    I did have steady white smoke when decellerating from full throttle when I first got my 836 running, due to rich gas mixture(has since disappeared). Also, a bit of oil consumption for first 500 miles or so until rings were well seated. Heavy white smoke that lingers in the air would not be good, but I've had that little white haze that disapates about 5 feet behind the bike when sorting out tuning on a fresh engine.

Will do.

[Sam Green Racing]

Further to what Sean has just said Sweepy, the CR carbs are racing units and should be treated as such.
You need to get your exhaust in the state you are going to run it before any atempt to sort your carb settings.
Also, settings that work for one person and their bike might not work on yours.
These instruments are very sensitive and susceptible to fluctuations from weather and alltitude change.

If it makes you feel any better, our CR leaves a trail of white smoke as it leaves the line.....................































from the rear tyre

Sam.

[Sweep]

Further to what Sean has just said Sweepy, the CR carbs are racing units and should be treated as such.
You need to get your exhaust in the state you are going to run it before any atempt to sort your carb settings.
Also, settings that work for one person and their bike might not work on yours.
These instruments are very sensitive and susceptible to fluctuations from weather and alltitude change.

If it makes you feel any better, our CR leaves a trail of white smoke as it leaves the line.....................































from the rear tyre

Sam.

 

[MRieck]

Further to what Sean has just said Sweepy, the CR carbs are racing units and should be treated as such.
You need to get your exhaust in the state you are going to run it before any atempt to sort your carb settings.
Also, settings that work for one person and their bike might not work on yours.
These instruments are very sensitive and susceptible to fluctuations from weather and alltitude change.

If it makes you feel any better, our CR leaves a trail of white smoke as it leaves the line.....................


rom the rear tyre

Sam.

Bastard.....I knew it it.

[Sam Green Racing]