[Jetting] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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Jetting
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Posted by: kfxracer

I have an 05 kfx 400 with Uni filter, Hmf Slip-on, and no lid. With the 150 jet, it runs great in 80 degrees or less, but once it gets over 80-90 degrees, it boggs down a lil, kinda like my jetting is too lean. And, where I live, in the summer, it stays mostly 90+. It runs pretty good, and my pipe tip is black. I have a 152.5, should I install it, or should I buy one of those dial-a-jet's? Or should I just leave it alone?

Posted by: cataway

i asume you mean it does the boging down on the top end ,if thats true more gas should help, a 155 is what i would try.

Posted by: kfxracer

yeah, that's what I meant thanks!