dumb 440 question

[underpowered]

alright, i know that in order to build a 440, you have to actually bore the cylinder to fit a larger sleeve. but once the 440 wears our, is it a 440 for life or is there a company that makes a sleeve to sleeve it back down to a 400?

[jak1389]

i dont think there is. you can find used 400ex cylinders very cheap if you wanted to bring it back down.

[TRXRacer1]

Wiseco has a 440 sleeve that is 426 ready. If you use that one then you atleast have two bores on it you can do.

[sportraxkid]

almost all 440's have 89mm piston's which is really like a 435 and they sell 89.5mm piston which is a true 440. So if it wear's out which it probley wont you can bore it .5mm's out and buy a real 440 piston.

[brian250racer]

Comanies like LA Sleeve should make a 400 sleeve to put it back to stock..I have talked to them about making a custom sleeve for another bike, kinda high $$$$. Definately cheaper to buy a cylinder of Ebay, or something like that..