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Stage 3: single-cam motorSpecifically designed for Hot Rods big bore/stroker kitNot for stock displacementRequires Hot Cams valve spring kit part number SKYFM660S2Uses stock auto-decompression mechanism

Stage 1: Dual cam engine.Intake and exhaust cams sold separately.No bottom-end loss with strong mid-range to top-end gains.Cam uses stock auto-decompression mechanism.Uses stock valve springs.

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylindersThree kit options to choose from: Standard Bore, Standard Bore Hi-Compression and Big BoreCylinder kits include matched Vertex pistons to...

Kit contains stroker crankshaft, main bearing/seals and complete gasket set for complete installation+4mm strokeMakes 260cc with stock pistonImportant: Head Chamber area must be machined 2mm deeper to accept longer stroke crankFor 1987 - 1989 Honda TRX...

Increases horsepower and throttle responseInstalls in minutesThird generation technologyNo computer needed to adjust EFIPlug-in technology (Does not interfere with stock ECU map)Integrated faceplate buttons provide easy adjustmentHighly recommended for...

Increases horsepower and throttle responseInstalls in minutesThird generation technologyNo computer needed to adjust EFIPlug-in technology (Does not interfere with stock ECU map)Integrated faceplate buttons provide easy adjustmentHighly recommended for...

Increases horsepower and throttle responseInstalls in minutesThird generation technologyNo computer needed to adjust EFIPlug-in technology (Does not interfere with stock ECU map)Integrated faceplate buttons provide easy adjustmentHighly recommended for...

Designed for machines with 28in. or larger tiresHelps restore power loss due to addition of larger tiresAllows for easier turning of larger tires in the mudBetter low end power and torqueQuicker backshift which results in crisp throttle responseReduces...

Bronco Components has been committed to providing the utility ATV& UTV riders of the world with quality products since 2003. Designed byriders for riders, everything Bronco ATV manufactures are engineered with twothings in mind: dependability and...

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...

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...