With 20,000 miles and a dealer service a few days ago I had a friend tell me he saw a puff of white smoke as I hit the gas after decelerating down a hill.
I have dealer installed stage one, I service the bike regularly using syn-3 and I don't seem to consume any oil. I've had one other person tell me this last year and the exhaust smells very slightly on the rich side.
Dealer tuned the bike at the time of the stage one using SERT and a dyno. (At least they said so.)
I usually get just under 40 mpg and I think the dealer may have tuned it a tiny bit richer than the factory lean setting. Other than that, everything is stock, well maintained and it runs like new.
Any Ideas why I'd get any smoke at all and whether I should be worried about it?

 

What color is the smoke? Is it right after you start the bike or after it's warmed up?

 

White smoke is usualy water vapor When engine too rich smoke color is black and will leave blck soot on pipes

 

When you decelerated, did you downshift and run up the RPM's?
You might have had some extra fuel in the cylinders that didn't ignite.
If you don't continuously see smoke either on startup or when hot, I wouldn't worry.

 

Sounds like a valve guide seal. Check your plugs if one looks a bit on the fouled side it would indicate an intake seal, if the plugs are clean, pull the pipes and look at the stem of the valve, you will find a trail of oil down the stem. Being that you say it is ever so slight, you will not find a soot residue most likely on the pipe tips. I never thought to pull mine down until someone told me I puffed on decels and down shifting.

 

No, no, no..........


White smoke means they have elected a new Pope.





Anyhow...... if it is on the cool side temperature wise, a puff of white is fairly common. I noticed the OP is from NY..... that could account for cooler temperatures outside.

Deceleration usually causes a little loading, hit the throttle and that burns off.

 

Responses from FD and Shooter make the most sense to me. Thanks.
Absolutely nothing else seems out of whack. Dealer replaced plugs three days ago and they are definitely meticulous enough to have reported any fouling.
No loss of oil or any running issues.
Everything works like new other than the fact that I've never achieved the gas mileage that the manual predicts. But then, who has?
BTW I've used the "New Pope" joke before, myself. I should have expected it.

 

If it's a quick puff of blueish white smoke then I believe it is ignited fuel vapor in the exhaust which is pretty common when you whale on the throttle. If it was dark out you might even be able to see a lick of flame in there. Nothing to worry about.

 

Bluish smoke is only oil burning

 

Like I said if its the exhaust seals your plugs will appear fine and the amount of oil loss may be negligible.