1985 model, I've had the bike 2 and 1/2 months and so far it has been perfect. Last week after a ride I lightly washed the mud off the bike (no water in intake or exhaust), then started it for a short ride. After a couple of minutes, it acted similiar to running out of gas, sputtered and quit. Could not restart it. Today I was able to fire it up for a few seconds, but then it would die out. On the second try it backfired. I am new to working on 2-strokes so the only thought I have is perhaps the timing slipped? Is this possible? Any other suggestions? Also, where can you get a fly wheel puller for this motor? (hopefully not Kawasaki) Thanks in advance-Bill.