quadrider60
08-17-2005, 09:39 AM
im rebuilding my 01 400ex from the ground up and its getting close to doing the engine i just need a little help choosing what i should do i was thinking
416 bore
port and polish
had valve springs
hot cam
k&n filter
hmf exhaust
or a 426 with the same mods. and how do u guys think a motor like either of those would hold up to a stock 450r
416 bore
port and polish
had valve springs
hot cam
k&n filter
hmf exhaust
or a 426 with the same mods. and how do u guys think a motor like either of those would hold up to a stock 450r