[Guest]

Well I bought a 2006 Foreman S and it's about 3 weeks old. It likes to back fire a lot. 4-6 times when I let off the gas in ever gear. Should I re jet it? I live in Montana and where about 3100 feet up. Maybe I could re jet a little higher. ??? If so what jet should I go up to. The stock is 162.5 right?
Thanks

 

[dirty4man]

Have you tried adjusting the needle or air/fuel mixture screw on the carb? If not I would try adjusting first before rejetting. Just remember where you settings where at in case you need to start over again. Myself I would start with raising the e-clip up a notch on the needle, by doing this it will drop the needle down in the jet futher lessing the fuel flow. The air fuel mixture should be out 2.5-3 turns out.

 

[Guest]

Back fire

Thanks
Also I use 85.5 Octane gas. Could that be a problem?

 

[dirty4man]

I run the cheap stuff