Ok guys, here is the back story (Kinda Long): I put both bikes (06' CRF250, 03' CR250) in the back of the truck and went to the track. I got there and remembered I had done EVERYTHING for maintenance on the CRF except the easiest thing and change the filter. I rode it anyways. Got about 10 hard laps in and it felt like I was on the brakes. Made little power and would nose dive in the air and almost die until landing. Felt almost like I had some binding or something in the rear wheel. Got it back to the truck and pulled the seat to find the filter dirty and drenched in 15-40 and the over flow tube completely full. I had this happen to me a few years ago at a triple header weekend that was dusty as hell(Sounds bad but I usually change filters religiously). I was bummed but had the 2 smoke along so I didn't ruin the weekend. I got it home cleaned the filter, air box, drained over flow, put it back together and washed it. Loaded it up the next weekend and took it to the track, it was hard to start but once I got it going it seemed to run fine with the choke as well as idling to the track (I run a higher idle as well). Got it out on the track and it was doing the exact same thing ....no power, felt like I was dragging the back wheel when I got off the gas and would nose dive on jumps just the same. I pulled in immediately knowing something wasn't right somewhere. Pulled it apart tonight to check the valves and they were a little tight but not excessive. Both Exhausts were at .009" and the Intakes were at .003". Chain tensioner looks to be ok and functioning and the timing looks to still be spot on. I pulled the carb while I was at it and will clean that tomorrow. Maybe that dirty filter sucked up some stuff and plugged something. Its the last thing that I can think of for simple stuff. Its an 06' with an 08' cam and springs and a CP 14:1 Piston. Any ideas from the moto family?