So I have an 09 250F that has some mods including a Williams motowerx ported head with cams, high compression piston, pipe and I think that's about it for the engine. Anyways I noticed that after I've been ripping the bike at the track for a few laps, I'll stop for 5 minutes and chat with the buds and when I fire it back up it seems like it's pulling harder than before when it was at hot track ripping temp. It has the oem clutch in it still, that stuff is all stock. The only other thing I did was put in a CP, 2 ring 13.5:1 piston. Thoughts? Clutch Slipping?