i have a '95 yamaha timberwolf, .020 wiseco piston, K&n jet kit, k&n filter, dg pipe, and a custom 2" pvc air breather. at wide open it runs a little rich and i know how to fix that but around 1/4 throttle or 1/2 throttle it spits and sputters, it has power, but it sounds like crap but it doesnt have that much power either. its not a smooth speed its jumpy and squirly. can someone help me out? what do i need to do to my jetting besides lean off the needle jet a little bit? thanks

greg

'95 yamaha timberwolf
.020 wiseco piston
K&N air Filter
K&N jet kit
DG pipe
custom 2" pvc air breather
and soon on the way 22x12-10 mud machine a/t's

 

Sounds like you need to raise the clip up a couple of grooves on the needle, put in a smaller main why your at it.

 

ok, i raised the clip up on the needle another noth awhile ago and its runnin alot better, im going to go back out in a few and check my plug and its still showin signs of excessive richness im going to riase it one more notch, thanks for your help,

greg

'95 yamaha timberwolf
.020 wiseco piston
K&N air Filter
K&N jet kit
DG pipe
custom 2" pvc air breather
and soon on the way 22x12-10 mud machine a/t's