View Full Version : honda 400ex

Nov 17th, 2010, 09:33 PM
well i have a 400ex messed up the top end on it picked a 440 kit for it and wondering if anyone has anything good or bad to say about it and i did also pick up a hot cams stage 2 came and i do have a full curtis sparks exhast for it to

Matt Fisher
Nov 17th, 2010, 11:10 PM
Call Ross Pistons and pick up a lightweight tool steel wrist pin, it'll keep the reciprocating assembly much closer to the OEM weight.

Pay attention to the squish area and deck the head to get it to a good clearance. Mill the top of the piston to get the CR where you want it.

Consider having it ported, and unless you're running aftermarket valve springs, don't even think about running an aftermarket rev box (those springs are a good idea anyway).