I finally fixed my warrior. The problem was the piston and rings. I installed a top end rebuild kit with piston, rings & new head gaskets. Put it back together and it fired right up.

 

Hey mine is having the same problem I have good compression new carby and a spark but it looks a bit weak compare to my other bikes but has new coil lead and plug could it be my stator

 

My 1998 yamaha warrior 350 will not start, it makes the putter sound like it really wants to start but when i give it gas it bogs down and wont start! Please help??!

 

Fit a new plug and check it sparks. If that doesn't work, clean the carb out. One other problem, rather peculiar to Yams, is a cracked inlet manifold, so check that too. If it still won't fire up, re-set valve clearances, then check compression. If below 90psi, it is getting time for a top end rebuild.

 

I put a new plug in. Its running now but very fu*kin rough🥺 help!!