My 97 Warrior runs great but it seems after I ride awhile 20 minutes or so the motor bogs down and does not take gas. I just came back and I find that when it happens I am near full throttle and will bog to a stall. But I think when I pull the clutch the throttle picks right back up again.
It sounds like you got a cloged fuel line or jet. and also the carburator is getting to hot and gets vapor locked.. Thats all i know with out seeing it ....