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50 Posts
u do know u can make urn 400ex just as fast as a 450r
mine loves to race with the 450s all day

if ur interested on how then ill tell u how to build quit the race engine

but of corse it wont handle as well and if u cant do the work ur self then it is kinda expensive
but its nice to pull up on a 400ex and beat the 450s

they freak every time
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