Dirt Bike

All pistons are heat treated with a T-5 hardening and tempering cycleAll piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeCast piston kits are gravity cast aluminum alloy (not...

All pistons are heat treated with a T-5 hardening and tempering cycleAll piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeCast piston kits are gravity cast aluminum alloy (not...

The Big Gun Evo Racing Series was designed to deliver maximum horsepower & torque gains throughout the RPM range. Made from .049 stainless steel tubing & an aluminum muffler canister, the Evo exhaust system is much lighter than stock units...

The Big Gun Evo Racing Series was designed to deliver maximum horsepower & torque gains throughout the RPM range. Made from .049 stainless steel tubing & an aluminum muffler canister, the Evo exhaust system is much lighter than stock units...

The Big Gun Evo Racing Series was designed to deliver maximum horsepower & torque gains throughout the RPM range. Made from .049 stainless steel tubing & an aluminum muffler canister, the Evo exhaust system is much lighter than stock units...

The Big Gun Evo Racing Series was designed to deliver maximum horsepower & torque gains throughout the RPM range. Made from .049 stainless steel tubing & an aluminum muffler canister, the Evo exhaust system is much lighter than stock units...

 Stage 1: Dual cam engine. Intake and exhaust cams sold separately. Good midrange and top-end increase. Cam uses stock auto-decompression mechanism. Uses stock valve springs.

 Stage 1: Dual cam engine. Intake and exhaust cams sold seperately. Improved mid range gain with great top end gain and over rev. Uses stock valve springs. OE fuel mapping is acceptable, but could be fine tuned

Kits include aluminum cylinder with nickel-carbide coating designed with larger water jacketsIncludes Forged piston, rings, clips and pinAthena top-end gasket set includes required seals and hardwareEasy-to-follow step-by-step installation...

Includes crankshaft, main bearings, complete bottom end gasket set, including all seals and gaskets needed for the jobThe crank pin bearings are manufactured from the highest quality hot rolled steel. Case hardened to 58-62CThe caged needle roller...

Forged from high-silicon aluminum alloy for maximum strength and dependability.Innovative forging design and piston skirt provide maximum horsepower and torque.Wiseco High-Performance piston kits are priced with piston, rings, pins and circlips (unless...

Forged from high-silicon aluminum alloy for maximum strength and dependability.Innovative forging design and piston skirt provide maximum horsepower and torque.Wiseco High-Performance piston kits are priced with piston, rings, pins and circlips (unless...