Jump to content

KDX 220 timing?

Recommended Posts

Any of you that know the 220 also know it's pretty flat on top end. Despite Boyeson reeds, numerous jetting attempts, FMF pipe/silencer, and air box delete, I still can't get it to rev' out to what I consider satisfactory. So I'm doing a complete rebuild and sending the head and carb' to RB Designs for Ron to work his magic.

So if that doesn't meet my satisfaction, is there any danger in retarding the timing a little to help it rev' out a little more? I know I'll probably lose a "little" on the bottom, but I have gobs there already. If there's no danger of engine damage, I'd like to try it and see. If it doesn't work or I lose more than I want on the bottom, it's an easy change back to factory.

Any thoughts and/or personal experience???

Share this post


Link to post
Share on other sites

You won't hurt anything by changing the timing a bit. Though, personally, I would upgrade the CDI to one of the Jaguar adjustable CDI's. This one mod really woke up my 220. Here's a link: http://www.dragonfly75.com/moto/KDXCDI.html Yes, it's not cheap and he says he is currently out of stock but contact him as I think he has some in the works. Of course, the CDI can't do squat if you have the FMF Gnarly Woods pipe. The Gnarly Woods pipe kills all top end no matter what mods you have. If you do have it, buy the Gnarly Desert pipe. It significantly helps the top end and works great with the RB mods and Jaguar CDI.

BTW, here is a link to my bike setup so you can see the mods I have done: http://www.kdxrider.net/forums/viewtopic.php?f=103&t=18726&p=169369#p169369 I have great top end and still have the awesome low end power the 220 is known for.

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


×