Smoke with Choke

[7thgear]

Hi there,
I started my bike after say five or six days today. Winter has already started so I engaged the choke before pushing the start button. Bike starts perfect, but then after about forty seconds I noticed whitish smoke coming out of the exhaust. I closed the choke and the smoke was all gone. Bike is running perfectly, no problems whatsoever. Is it normal what I have experienced or something to worry about?

Thanks..

[ryott52]

If it's been sitting for a couple days that may just be condensed frost/water in the pipes heating up into steam. It could also be unburnt fuel vapor blowing out, since choke basically dumps a bunch of extra gas into the cylinder to aid in cold starting. When I start after a cold night I get a bit of the same thing with my bike.

[jestercinti]

If it's been sitting for a couple days that may just be condensed frost/water in the pipes heating up into steam. It could also be unburnt fuel vapor blowing out, since choke basically dumps a bunch of extra gas into the cylinder to aid in cold starting. When I start after a cold night I get a bit of the same thing with my bike.

+1.  I get the same thing on very cold mornings.  Once it warms up and the choke is off, it goes away.

[pliskin]

Same stuff you see out of a cold car's exhaust. Prob just water vapor. If the smoke lingers a long time it's oil. If it dissipates quickly it's water vapor.

Mine does it also.