Best YFZ450 98mm +3 Big Bore Kit YFZ 450 Carb 478 cc Cylinder Top Upper Assembly

FITS '03-09 / '12-13 YAMAHA YFZ450 CARB MODELS ONLY

BPRATV 98mm big bore nikasil cylinder (1year warranty)*

Wiseco, CP, JE, or Wossner forged big bore piston kit*

Nitrite coated piston rings

Chrome wristpin

Circlips

Top end gasket kit

Cometic big bore MLS head gasket

Timing chain

Maxlock TITANIUM head stud kit - LIFETIME WARRANTY*!

Piston uses pump or race gas

No mods required

1 year warranty*

We are an authorized distributor