Earlier this year...my banshee was runnin great in the dunes. Now that its cooler out, its been sputterin on the top end, and it has much less power. I lowered the main jet, but that didnt help. My plugs dont look too rich. Should I raise the clip on the needle?

By the way, im leaving for glamis in a few hours. TIA

 

The colder air is more dense...you need MORE main too compensate for more air.

 

but doesnt it mean your rich when it sputters?

 

A sputter can be a rich or a lean condition. The bog is more noticable in the higher gears and occurs more when you short shift right? The colder temps allow for the air too be more dense, so you have more air introduced into the cylinder with the same amount of fuel.....so jetting up is required. Jet it up before you cook it.