when i go up hills on my '02 grizzly it starts spitting and sputtering but will not go dead. i have been told that it might be the rev limiter. how can i fix this? please help!!

 

Float setting maybe. Did it always do it or start suddenly?

 

did it always

 

the yamaha shop put the new vent covers, gas tank and heat sheild on and said that it should fix the problem, but it didn't

 

the tech at the shop said "if it was the float it would do it even under normal driving conditions"
it runs fine except when i put it in a bind like going up hill.

 

In my unproffesional opinion I still say float. The tech at the shop is wrong. My grizz got hot enough to sputter several times during a ride, it doesn't matter if your on flat ground or a hill with that problem. If your float was out of adjustment, it could very possibly give you problems only on hills.

If anybody thinks differently, please add your thoughts.

 

If its totally stock...air filter, exhaust, clutching..then its not the rev limiter. A stock grizzly wont hit the rev limiter in high, the clutching wont let it.
My best guess would be the float is too low, or the air box lid is off, or the intake has a leak.
If you pull on the choke, when it sputters...will it get better or worse? or no difference.

 

have not tried the clutch, will try it tomorrow, thanks guys

 

If it is lean it will sputter when you ask for power. I would try putting tape partially over the snorkle and see if that helps. If it does, then I would look into rejetting. What Throttle position does it happen in? I could also be the float out of postion. You should also check for air leaks around the carb. I will sometimes spray a little starting fluid lightly around the carb while it is running. If it is sucking air, it will affect the idle speed when it whiffs some ether.