slip-on

[jaredZ400rider]

if i want to put on a HMF slip-on would i have to rejet?

[400exrider_ed]

You might need a slighltly bigger main, and a bigger pilot, if your running no lid. HMF will take care of you if you call them. They are LOUD pipes, I see your in Kinston and if you run D34 MX a HMF will fail tech slip-on or full they are over 99db.

[250r/kfxrider]

With the HMF slip-on you do have to rejet and have to adjust the mixture screw. The baseline settings are all on the HMF website at hmfengineering.com/jetting/index.php. The pipe is a little loud but they offer the quit core insert, which drops the DB's down quite a bit. HMF is one of the higher hp+torq gaining pipes out there and for the money they are well worth it!!

[jaredZ400rider]

i dont want it to be to loud but my friend has a white bros R4 pipe..if i got the quiet core will it still be a little loud but not extremely?

[400exrider_ed]

It'll be not as loud but the core lowers power. Yoshi's or Big gune Evo-x are nice power and qiuet systems.

[250r/kfxrider]

The quiet core does not make any difference in power no matter what anyone else tells u, it will still sound good and you can still kill those EXs' lol!!!!