Any help on making my 400EX faster?
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One thing is if you want to race AMA sanctioned 250 2 stroke you might want to wait before you purchase a piston. They may allow 440s to run where now they only let 416's in the 250 2 stroke.
I have Curtis working on my motor right now and hopefully the end result will be a 440 National. His 440 uses a sleeve that is the same thickness the entire length so you have to have your cases machined to allow for the sleeve. Also it allows you to use a larger bore size I believe you can go to 465 with his sleeve.
I have his X-4 exhaust right now it is really sweet. You can find info about sparks on his website.
Adam Smith
99 400EX
I have Curtis working on my motor right now and hopefully the end result will be a 440 National. His 440 uses a sleeve that is the same thickness the entire length so you have to have your cases machined to allow for the sleeve. Also it allows you to use a larger bore size I believe you can go to 465 with his sleeve.
I have his X-4 exhaust right now it is really sweet. You can find info about sparks on his website.
Adam Smith
99 400EX