Description

Yamaha Raptor 660R Big Bore Master Top End Rebuild Kit

Upgrade the top end of your 2002-2005 Yamaha Raptor 660R with this Big Bore Master Top End Rebuild Kit from REV6. Designed for engines that need a complete upper-end overhaul, this kit combines a big bore cylinder, +4mm piston kit, intake valves, exhaust valves, and a top-end gasket kit into one complete package.

Replacing the cylinder, piston, valves, and gaskets together simplifies your rebuild while restoring compression and giving you the added benefit of a big bore performance upgrade. Additionally, matching these components helps streamline assembly and reduces the need to source parts individually.

When This Big Bore Master Kit Is the Right Choice

Choose this kit when your top end requires a complete rebuild and you want the added performance of a big bore upgrade. It combines the major upper-end hard parts with a complete valvetrain refresh, making it our most complete big bore top-end package.

What This Kit Includes

• Intake Valves (3)
• Exhaust Valves (2)
• Top End Gasket Kit (1)
• Big Bore Cylinder (1)
• +4mm Piston Kit (1)

Compatible Yamaha Models

• 2002-2005 Yamaha Raptor 660R

Need help choosing the right big bore rebuild kit? Contact REV6. Our experienced team is ready to help.

Continue Your Yamaha Raptor 660R Engine Build

Need a big bore kit without replacing the valves? Compare the Yamaha Raptor 660R Big Bore Complete Top End Rebuild Kit.

Planning a complete engine overhaul? View the Yamaha Raptor 660R BIG BORE Master Engine Rebuild Kit.

Need additional performance parts for your project? Browse our Yamaha Raptor 660R engine parts and rebuild kits.

Every REV6 replacement part ships nationwide and is backed by our 1-year warranty, giving you confidence every time you rebuild.