Hey guys. Just wondered what size everyone else is using on their Raptor 660's for main jets. I'm running an HMF Sport Series FULL SYSTEM with a Uni Filter. I used the ones that came with the pipe (150 & 155). Just today I upped my pilot jets from 22.5 to 27.5 - which fixed the snap crackle pop on deceleration, but I'm still getting some hesitation on top end. I had read some pipe manufactureres recomended much larger main jets than what I was given by HMF. Any ideas what I should get? I don't want to have to buy a whole kit - I just bought the pilot jets individually off Magic Racing and I'd like to do the same for the main jets. Thanks.

 

actually i heard the jets they give you are too big...instead of small

 

No, it's definitely running lean. When it's maxed out it'll spit and sputter a little bit. Nothing TOO dramatic, but it's definitely a lean issue. Anyone???