i have a 99 warrior that has been out of commision for some time now. I started to fiddle with it the other day and I was hoping you guys could help me out...
I was riding one day and it started to run weird. Would miss every few strokes at high rpm, breaking up etc... took it back to the house and it would never run after that. Checked everything i could think of and couldn't fix it so I took it to the stealership. They said it was a bad stator and couldn't check other stuff till that was replaced. They tested the coil and it tested just fine. So I took it home and it sat forever till I got a new stator.
Bought a new high output ricky stator, new battery, new starter (old one was getting weak, brushes probably) put all that in, new plug. Here's the problem...
It will start and idle awesome, but as soon as I give it some gas it will break up and pop and backfire on the exhaust side real bad. the more gas you give it, the longer the backfire. just off idle= blap blap blap full throttle= blap blap blap
I tore the carb totally apart, cleaned every single part, no fix. Jetting was right on before the problem. I checked valve lash and it is right at what the clymer manual says.
Warrior's use the CDI to advance the timing as you rev up and I am thinking the CDI unit is bad or lost a capacitor on the high rev side since it will idle and run great at idle, but goes to shit at about 1200-1500 rpm. Other than the CDI the only other thing I can think of would be weak valve springs. They are strong enough to pull closed at low rpm but when it revs they aren't strong enough to pull the valves closed at the higher rpm. The bike is pretty much stock except a K&N clamp on kit, and FMF Megamax II silencer with powerbomb header.
Do you guys think it is a CDI problem or something else? I am pretty sure its not jetting since it was jetted just fine before the problem and I cleaned the carb twice to be sure nothing was plugging up a main jet or something... Please Help!