I just bought a 1990 warrior 350 this is the first warrior I have ever owned I have a 350 big bear and a honda 350 I know they are geared lower but they have a lot more power then this warrior it wont even hold speed in 5th gear I just dont know if thats the way they are or if mine has problems any help would be great seems like it may need some carb adjustments but just not sure one other thing is if you speed the engine up for about 30 seconds the exhaust will get red hot and there is a little hole in the pipe and it doesnt take much to shoot a flame out of it

 

check your valve clearances, clean and adjust the carb, new plug and see how you get on then!