Need help jetting!!!

[h400exrydr]

Can somebody help me? I have a 2003 400ex that is a 416 with a stage2 hotcam, uni filter, yoshimura slip on,and a fmf power bomb header. Right now i have a 155 main and a 42 pilot. Whenever i back off of the throttle a blue puff of smoke comes out. That is the only time it smokes. And it really only does it when it is hott. Can some1 please help me?

[sandspanker]

:confused: That is a tuffie. Possibly might be the valve seals?? What does it do on a cold start up??:ermm:

[h400exrydr]

when it starts cold there is no smoke what so ever. It is just when it gets really warm. Another thing is that it runs awesome and really strong.

[bwamos]

Could ba a hair rich. Wetting the cylinder with unburned fuel will sometimes draw up a little oil past the rings. Known to happen fairly commonly on 400ex's.

Might try going down 1 size on the main jet to see if it helps.