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Unlock the full power of your Yamaha 660 with this top-of-the-line Big Bore Top End Kit.

Squeeze every last ounce of power from your Yamaha 660 with this premium top end kit. The large 102mm +2mm bore size and top tier piston kit deliver a serious boost in horsepower and torque, This kit is engineered to handle the demands of high-performance riding, ensuring your Yamaha 660 can tackle the toughest terrain with confidence.

Fits Yamaha Raptor 660 / Rhino 660 / Grizzly 660 – All Years and Models

Drop In Ready. No case modification required.

Kit Includes:

• 102mm +2mm Big Bore Cylinder (1 year warranty)
• Wiseco, CP, JE, or Wossner 102mm forged piston kit (includes piston rings, wristpin, and circlips)
• Top End Gasket Kit with 102mm Big BoreMLS Head Gasket
• Viton Valve Stems Seals (All 5)
• Heavy Duty OEM Replacement Cam Chain
• Titanium Cylinder Bolts / Head Stud Kit

1 year warranty for your peace of mind*

– The Best Parts. The Best Performance. The Best Price. BRAPPPPPPPPPP!