HELP - Blue Smoke! : (

[l3uddha]

I was told by a few people at today's trackday that there was blue-ish smoke coming out from my exhaust can on downshifts and closed throttle. 

so yea i'm engine breaking on downshifts, so when I have the RPMs high and close the throttle, the revs drop and the smoke comes out. 

I have not idea what this could be...  can someone help me as where to start???  next trackdays are in less than a month!

background is:
bike was crashed last september.
sat in a garage until about a week ago, not started, not winterized.
I got everything going, took a bit of running it and I put some seafoam in the tank, but appeared to be running pretty well today on the track.
RPMs are a little slow to return to idle when revved, but nothing I thought as a major concern. 
2004 K&N pods, jardine exhaust, jetted accordingly.

[mach1]

blue smoke usually means your burning oil. either from worm piston rings, scored cylinder walls or a leaking valve seal. If its a white-blue smoke than thats either a incomplete combustion or injection system problems( maybe not the last one)

[coll0412]

blue smoke usually means your burning oil. either from worm piston rings, scored cylinder walls or a leaking valve seal.

Mach1 is right on, but  I wouldn't be too worried unless its and excessive amount of smoke. GS's are notorious smokers at high rpms and closed throttle conditions. In fact I just rebuilt my motor this winter and still if I am above 9K  and close the throttle all the way I get a little puff(or so I am told). I honed the cylinders,new rings, re-used the pistons, but everything was within specs. The head was redone with new valve-seals and all, yet it still smokes a bit. Infact half of the GS that race smoke at high rpm and closed throttle so I am not sure if it is just a piston-wall tolerance issue or what.

As can be seen below.

[l3uddha]

the instructor riding behind me came by afterwards and said he could smell it.  some people have said valve guide seals.  know anything about this??

[The Buddha]

Oh yea valve seals made of sheite ... yup. Not that that is the only POS in this bike though.
Rings, valve guides themselves, etc etc ...
Cool.
Buddha.

[l3uddha]

how difficult is it to replace it all?  I've never even checked the valves myself lol.

[rohde88]

hah, i have the exact same problem on my 04, 16,XXXmiles, oil changed regularly, no engine mods

did one trackday weekend and it was fine. this past weekend, i was smoking on downshifts and someone told me about it. I guess i won't do anything since it doesn't appear to be affecting power.

[dgyver]

I would not worry about it. Run it as is. It is just a track day, not a race. If you are still concerned, wait until winter then rebuild the top end.

[The Buddha]

In 48K my 89 never smoked ... ever. Used plenty of oil, just not by smoking it.
But, track bike - just watch it and keep it up with fresh - you run 0wt right ... may use 0wt and not if you had 20/50.
Cool.
Buddha.

[arbakken]

if it's valve stem seals, it'll be really bad on startup, and then not do it very much at all the rest of the time

[yamahonkawazuki]

In 48K my 89 never smoked ... ever. Used plenty of oil, just not by smoking it.
But, track bike - just watch it and keep it up with fresh - you run 0wt right ... may use 0wt and not if you had 20/50.
Cool.
Buddha.

where did the oil go then oh semi- wise one

[The Buddha]

Plenty of theories, I have had liquid oil get out of the exhaust like a fine spray coupled with water, carbon and gasoline upon revving up.
Rev up with you hand behind there and you'll get black fine misting spray.
Cool.
Buddha.