350 warrior

[1990Blaster97]

Hey guys i recently got a yamaha warrior ran fine for a day or 2 then it started backfiring and sputtering it starts fine and idles but evertime i give it throttle it backfires i have changed the plug what else could it be i havent checked the carb yet but i dont know help me out please

 

[1990Blaster97]

and i have heard putting the park brake on can do something to the rev limiter but this doesnt have a parking break on it

 

[Larry's Shee]

1. Flywheel could be loose or sheared key. Warrior puller is different than Blaster.
2. Time chain is loose and it jumped time.
3. Valves need adjusting.
4. CDI took a dump.
5. Maybe massive air leak/lean, check manifold. Clean carb well.

 

[ISMELLRICE]

damn it sounds just like mine 2 days ago when i found out my parking break was stuck on..after i released it the baby ran perfect again

 

[UniRacing]

sounds like a intake boot,the manifold that bolts to the engine often crack or split