[what needed to make a realy fast 400ex] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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what needed to make a realy fast 400ex
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Posted by: 6858-400ex

what are all the things i could do to make the most power out of my 400ex. what bore size, comp, and besides nos and a turbo

Posted by: Wanksta

a crf450 engine..

Posted by: ride_red666

460 stroker and up

Posted by: 400EX QUADER

465 piston with a +4 stroker crank to make it 500cc.

Posted by: ss440ex

CFR-YZ it!!!

Posted by: Rico

I get R Dun with the setup below.....

Kiehn 42 mm Carb
HRC cam
JE Piston 10.8:1 Compression
Hinson Clutch Basket
Cometic Gaskets
Sparks Racing 8 Plate Clutch w/Heavy Springs
Sparks Heavy Duty Cam Chain
Lightened Flywheel
GT Thunder Porting_
GT Thunder CDI
GT Thunder Heavy Duty Head Studs
GT Thunder Air Box Intake Tube___ _
FMF Powerbong Header
Red HMF Silencer
AMSOIL Air Filter
AMSOIL 20w-50 Synthetic Oil

Posted by: jak1389

kx/cr 500 motor and amazing suspension

Posted by: jordan_m6

a fast strong thumb.

power means nothing when your suspension keeps you slow.