red:
Being at sea level here in Hawaii, no I never had to rejet. Believe it or not I have been very lucky with that. I thought that it would be a nightmare to get dialed in but the plug had always read mocha brown since I purchased the bike new. The only thing that I had to do when I changed the ratio was adjust my air mixture screw about 3/8-1/2 turn to allow more air. After every ride I check the plug and it still reads fine. I am using Bel Ray H1R synthetic running anywhere from 44:1 to 50:1 depending on how I feel when I pour the oil into my little measuring device. Hahaha. One thing about this oil though, it is gummy. I rebuilt my top end about 4-6 weeks after buying the bike because of the 220 piston being known to self destruct and while I was in there I cleaned everything up real well and I was shocked at how much carbon the power valves had accumulated. This is fine by me, I rather take the bike apart every now and then to remove carbon and possibly replace the rings then have to possibly replace the piston and rings and maybe even hone the cylinder every year. Just my thoughts is all.
By the way, have you considered swapping the factory piston for the Wiseco yet? I would do it if I were you. Just talk with Jeff Fredette and he will hook you up with the piston kit (includes piston, rings, pin and circlips) and required gaskets. Jeff is a great guy, if you have any questions or concerns just ask him and he will be more than happy to help out. I noticed that my bike revs a little quicker, is snappier and has a little meaner sound (idle particularly) now that I have the Wiseco. I am also riding with a peace of mind now that I don't have to worry about being a statistic.
I hope this helps.
Aloha
------------------
'01 KDX220r
Ride it Hard and Fast!