Does anyone know how to rejet a kfx400 or know of a website I can go to?

Thanks

 

I rejetted mine with a dynojet kit when I had it. Follow their guidlines for your elevation and mods and you will be fine. If you have a specific question regarding the how to ... change a jet, etc., ask away. The fuel screw on mine was hidden under a brass cover plate which you need to remove to adjust.