jetting on warrior

[89mustang]

I have a 1987 yamaha warrior with a .10 over forged piston, stage 1 cam, full dg exhaust. I have moved needle at highest point and running a 170 main jet. When i am at higher rpm's it cuts out really bad. Just wondering if anyone has any suggestions for me?

 

[91warrior]

sounds like you might be rich on the main jet. what jets are you using? if its dyno jet, i dont know how those numbers run, but if it is mikuni, then i would guess it is way to rich for your set-up but really cant tell. also from what i have been hearing, its best to let the needle c-clip in the factory setting, which is right in the middle.

 

[yamarider]

Regardless of the type of jet, 170 is still too high of a main jet for 99.9% of the warriors out there, a jet that large will surely make it run like ****. Try something around a 150 or 152.5, see what happens. The needle shouldn't need to be that rich either, I would try either middle notch or second from the bottom.

 

[89mustang]

I put a 147.5 in it today and left the needle at the highest point and its almost there! I am thinking of moving the needle one more spot down and it should be perfect! Thanks alot for your guy's help