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2002 Honda 400ex - Modifications

Barrett2011

By Barrett2011
in Honda ATV Forum

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Barrett2011 Newbie

Barrett2011

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I have a 02 400ex with stage two hot cams, port and polished head, 11:1 Wiesco high compression piston, open air box with k&n filter and i run it with 110 race fuel. Jetted to run with all these mods. Is there anything else i could do that would increase the performance of the bike without going big bore? I mostly do trail riding and some track riding and the dunes when i get the chance.

CK1999_400ex Veteran

CK1999_400ex

Posted
Posted

if you can get to a machine shop and take some of the extra weight off of the flywheel it will lighten the rotating assembly and make it rev faster an increase the power output .. I have built and raced mor 400ex"s that I can count on my fingers an toes .lol.. ill have to go through some of my mod sheets ..an can see if there are any more ..lol.. but the weight removal is a big performance gain..

  • 2 months later...
Barrett2011 Newbie

Barrett2011

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Sorry been without a computer for quite some time have not had a chance to get on here. So how would i explain to a machinist how much weight to take off without throwing everything out of balance.

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