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white smoke from left pipe

  • Thread starter Thread starter overboostin
  • Start date Start date
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overboostin

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Hey guys, on my new to me 650G with 14k miles I get white smoke from the left side exhaust pipe. Idle seems to be fine, and smoke is visible at idle or under load. Floats aren't stuck and carbs are clean. Any idea what it could be?
 
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overboostin said:
Hey guys, on my new to me 650G with 14k miles I get white smoke from the left side exhaust pipe. Idle seems to be fine, and smoke is visible at idle or under load. Floats aren't stuck and carbs are clean. Any idea what it could be?
Click to expand...
I blame most things on petcock- try plugging petcock vacuum hose nipple at #2 carb and run bike in "prime" petcock position and see if problem vanishes- remember to turn petcock back to "on" when you aren't running!

Carbs are clean? like how?
 
tom203 said:
I blame most things on petcock- try plugging petcock vacuum hose nipple at #2 carb and run bike in "prime" petcock position and see if problem vanishes- remember to turn petcock back to "on" when you aren't running!

Carbs are clean? like how?
Click to expand...


I took the carbs apart and checked. Was smoking before that though. Might be a stupid question but would removing the line and plugging the hole be different than just putting it in prime and leaving it connected?
 
White smoke, what could that be?
Blue smoke, oil
Black smoke, gas
White smoke, could it be a water vapor?
Now, I have seen a vapor come out my pipes when water from condensation got in there, or after I rode it. It took a spirited ride to burn it all out.
But............. could it be condesation in gas, water in oil, water in pipes.
My guess would be water in pipe. Why not the right? Water collects in the pipes and if on the sidestand migrates from the right to the left.

It's just mere speculation on my part, but I thought I'd throw some ideas out.
Go ride it and see if it diminishes.
 
tom203 said:
I blame most things on petcock- try plugging petcock vacuum hose nipple at #2 carb and run bike in "prime" petcock position and see if problem vanishes- remember to turn petcock back to "on" when you aren't running!

Carbs are clean? like how?
Click to expand...

So I tried that and I think it worked. How would the petcock effect that? New petcock time? Can I ride the bike as it is until I get a new one?
 
Also there seems to be an intermittent clicking noise from the left side of the motor. Related?
 
Just pulled the plugs. They're all fouled. Any thoughts?
 
White smoke is also oil, do a compression test, clicking also sounds like it could be busted rings. head gasket is also a possibility but doesn't explain the clicking, the compression test will verify, good luck.
 
Ok I'll do a test tonight. The bike has been sitting for awhile. Took it for a short rip a month ago and it felt ok. It's been sitting ever since then.
 
overboostin said:
Ok I'll do a test tonight. The bike has been sitting for awhile. Took it for a short rip a month ago and it felt ok. It's been sitting ever since then.
Click to expand...

These carbs don't like the "sitting for a while" stuff. They may look clean inside but have some small passages that clog easily. But you said your idle was fine, so maybe you'll get lucky

Edit; stock airbox? filter element in place? does "choke" appear to turn off at carb rack? how's inside of tank look? take pic of carb to head area and post it
 
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