426cc Big Bore Kit - Honda TRX400EX TRX400X XR400 RZR 900 Larger Swing Angles up to

Larger Swing Angles up to 45 Degrees

420" Seat Pressure 54# Open Pressure 195# @ Lift 0

Uni Filter Cleaner’s powerful agents quickly strip away grease and dirt

Contaminating elements such as sulfur

UNI Foam Filter Service Kit

426cc Big Bore Kit - Honda TRX400EX TRX400X XR400 RZR 900 Larger Swing Angles up to426 Big Bore Kit +3mm (88mm) big bore kit, includes JE Pistons complete piston kit and a Cometic top end gasket kit. This kit for your 400EX, 400X or XR400 gives a noticeable power increase without a loss in reliability. Available in 2 different compression ratios. This kit requires your stock cylinder to be bored and honed if youd like us to do that work, just contact us. Fits: Honda TRX400EX 1999 2008 Honda TRX400X 2009 2014 Honda XR400 1996 2007