I have an 1997 yamaha warrior and a 2001 banshee i race both of them now on the banshee i can hit all the gears no problem and on the warrior when i get to like 4th and 5th gear it bogs and try to cut off why do it do that it dies out but when i ride normal its good.

 

if you have engine mods done to it you might need a rev limiter

 

Could be several things... I heard once they have a known problem with an electrical connection somewhere that is simple to fix, but my memory is about as bad as my sorry old butt, so I can't remember the whole story. Something like a ground on the kill swithc or something... I can't remember.

You might have a clogged air filter... or a clogged fuel filter at the tank switch, or you might need a carb adjustment.

I'd call the dealer on the electrical deal, but you can check the filters yourself. If you are like me, you have never pulled the filter on the warrior... until it starts dying out in 4th and 5th gear (Sound familiar).

Bad or old gas can do weird things in the tank, and clog up all sorts of passages in the carb... You might try running some carb cleaner through it too.

 

On the back of the reverse switch a wire is grounded. Over time this ground is not adequate.
Run a wire off this ground back to the ground of battery and your problem will go away.