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mxstar52
04-30-2003, 12:36 PM
hey i just bought a 2003 400ex brand new and i wanna make it have more power but dont want too go inside the engine. I was thinkin a LRD full exhaust with either a fcr39mm carb or a edelbrock quicksilver carb and a filter with no air box lid.what else u think i could get too improve the power other than sprockets for about $1000 bucks total

mxstar52
04-30-2003, 12:38 PM
oh yea i forgot i want it in mid range power and a little topend:cool:

250EXking
04-30-2003, 12:58 PM
pipe, jet kit, air filter, sprokets, bigger carb, rev box

just open up a magazine and look at all the stuff for the 400ex. the possibilites are endless.