So I just rebuilt my top end on my cr85 ran perfect after break in process. Took t to the trails for Afew hours and the next day it never started up again. So far I've checked the piston looks good as new no signs of wear just a little carbon on top. The bike has compression wheel doesn't turn over if you put it in gear and try to roll it but if you try to kick it it won't start. I checked the carb took it apart cleaned and replaced everything to make sure it was gettin gas and there was no build up. After I checked my plug and the spark is strong so what can be the problem??? It ran perfect like nothin was wrong then over it just randomly died on me I've been able to start the bike but only if i push start and keep running pushin the bike to turn over the motor. Once it's in it bogs but catches the power band and starts moving like nothing's wrong once you let the gas go it bogs out and shuts off once I let the clutch go and turn the motor over it fires up. I've adjusted the carb to the same setup I always do to all my 85s when I first rebuild them to start them which is fuel screw one complete turn out and the air screw 2 turns out all my bikes have started up fine like that but no luck on this puppy, I've had the carb setup like that before but this time around nothing. What do you guys think is going on? Only changes made to the bike was changin from fmf exhaust to stock pipe and silencer. Can it be my jets? Last top end was rebuilt due to a hole being melted on top of my piston (wiseco top end kit in both rebuilds) but no damage to the cylinder so in lost now what do you guys got for me?