Description

Yamaha Raptor 660R Big Bore Master Engine Rebuild Kit

Completely rebuild and upgrade your 2002-2005 Yamaha Raptor 660R engine with this Big Bore Master Engine Rebuild Kit from REV6. Designed for complete engine overhauls, this kit combines every major hard part and wear component needed to restore reliability while adding the performance benefits of a big bore upgrade.

Including a new crankshaft, big bore cylinder, +4mm piston kit, intake valves, exhaust valves, bearings, seals, gaskets, cam chain, and water pump components, this is our most complete DIY rebuild package for the Yamaha Raptor 660R. Additionally, purchasing one complete kit helps simplify your rebuild and eliminates the need to source components individually.

When This Master Engine Rebuild Kit Is the Right Choice

Choose this kit when your engine requires a complete overhaul and you want to replace the major hard parts while upgrading to a big bore configuration. It combines the complete bottom end, complete top end, and full valvetrain into one convenient package for a comprehensive rebuild.

What This Kit Includes

• Intake Valves
• Exhaust Valves
• Crankshaft
• Big Bore Cylinder
• Cam Chain
• +4mm Big Bore Piston Kit
• Crankshaft Bearing
• Complete Gasket Kit
• Water Pump Rebuild Kit
• Oil Seal Set

Compatible Yamaha Models

• 2002-2005 Yamaha Raptor 660R

Need help selecting the right rebuild kit? Contact REV6. Our experienced team is ready to help you choose the best option for your project.

Continue Your Yamaha Raptor 660R Engine Build

Don’t need new valves? Compare the Yamaha Raptor 660R Big Bore Complete Engine Rebuild Kit.

Reusing your crankshaft, cylinder, and piston? View the Yamaha Raptor 660R Master Engine Refresh Kit.

Looking for additional replacement parts? 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.