Hey everyone, I haven't been here in while..I need some help big time..I haven't riden my bike for about 8 months until today. It's a 90 KX125..I changed the oil and plug and the bike fired right up..Rode it for like 10 minutes and it ran pretty good..After about 10 minutes, it started to stall out and hard to rev..Then it started backfiring and stalled...I could get it started for a sec or two, but it wouldn't hold the revs/backfire and stall.. What could have happened? I changed the plugs, cleaned the filter, cleaned out the resonator (KPS) (just the side thing) was filled with black soot...Flushed out the radiator with reg water..Same thing..It sounds like the timing is off, but how can that just happen? Oh, I also drained the tank and put in fresh gas and oil..I'm getting fuel/air/spark..I didn't get a chance to use a compression tester, but I could feel with my finger that there is compression. The only thing I can't think of is the carburator, blown rings/piston/head gasket or timing..Let me know what you guys think, since this is baffling me..Everything was great, now blah!!1
thanks
thanks