KDX 220 to 240

[preacher]

I'm looking for some feedback from someone who has made this big bore upgrade on a '97 or later 220. How does it perform, do you lose anything on bottom, middle, or top, jetting changes, is the bike that had this upgrade ridden motox or in the woods, I want to know anything and everything there is to know about this setup "before" I over bore my cylinder.

 

[Fred T]

Noi personal experience but I think I've read that the 240 isn't worth it. In some ways it was worse. Now a modded 200 to 225 is supposed to be real nice.

 

[70 marlin]

I've did the 200 to 220 on a 96. worked great.

 

[Mac]

I would also recommend the 225. The 240 uses a sleeve, the 225 is plated.
Plated cylinders are suppose to last longer and have better heat transfer etc...

 

[fuzzy]

Yeah, but this wouldn't be worth it for 5cc. Plus the 220 apparently has questionably crappy porting. I wish I could give you the answer on the 240, but all I can tell you is to do a search--this has been discussed and there are plenty of folks in this group with the LA-sleeved 240 kit.