Hi all, I gritted my teeth and dug into my carb today. This KDX is my first 2 stroke dirt-bike and I was not happy with the throttle response. A quick check of the plug revealed that the bike was running pretty rich. I read the tech tips on the Just KDX site and headed out to check my jetting.
With an FMF pipe/silencer and airbox lid removal, the site reccomends a 145-148 main jet and the stock needle in the second slot from the top. My bike has a 150 in it! Dropping the needle and tweaking the low-speed air-screw seems to have brought the bottom end to life.
Does anyone know what sizes of low-speed and main jets a '99 220 would have come with? When I change jets should I just go down one size at a time? Can I compensate for what seems to be an overly large main jet by dropping the needle farther?
Thanks for your help!
With an FMF pipe/silencer and airbox lid removal, the site reccomends a 145-148 main jet and the stock needle in the second slot from the top. My bike has a 150 in it! Dropping the needle and tweaking the low-speed air-screw seems to have brought the bottom end to life.
Does anyone know what sizes of low-speed and main jets a '99 220 would have come with? When I change jets should I just go down one size at a time? Can I compensate for what seems to be an overly large main jet by dropping the needle farther?
Thanks for your help!