Best Aftermarket Parts for the 400 EX???

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05-26-2002, 02:29 PM

domination

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I got a NEW 400 EX that needs some get up and go.
Please Help

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05-26-2002, 04:40 PM

guardog

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My buddy went with the duncan "fatboy 4" pipe and K&N filter. Re-jetted. It really made a great improvement on his quad. Check out Duncan racing. A bit expensive, but well worth it!!! (JMO)

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05-27-2002, 01:21 AM

Thrust

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Do a search. Its been gone over before.

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