Namura .040 Over Bore Piston & Gasket Kit for Yamaha Raptor 660 2001-2005 101mm

.040 Over Bore Piston & Gasket Kit for Yamaha

This .040 over bore piston and gasket kit for Yamaha Raptor 660 models from 2001-2005 provides a 101mm bore size and includes all necessary gaskets for a complete top end rebuild.

Overview

This .040 over bore piston and gasket kit for Yamaha Raptor 660 delivers a 101mm bore size for increased displacement and performance. Designed for Yamaha Raptor 660 engines from 2001-2005, this .040 over bore kit includes piston rings, wrist pin, and a full gasket set to restore compression and power. It is the ideal choice for restoring power and reliability in the Yamaha Raptor 660.

Built For Performance

• 101mm .040 over bore piston increases engine displacement
• Includes high-quality piston rings for proper sealing
• Full gasket set ensures leak-free assembly
• Wrist pin and circlips included for secure installation
• Precision-machined for consistent fit and durability

Fits These Machines

• for Yamaha Raptor 660 2001-2005

On-The-Job Use

• Restoring compression and power in worn Yamaha Raptor 660 engines
• Performance rebuilds for off-road racing and trail riding
• Replacing damaged or worn pistons during top end overhaul
• Increasing displacement with .040 over bore for more power

Specs At A Glance

Good To Know

Q: Does this kit include all gaskets for the top end? A: Yes, the kit comes with a complete gasket set including head gasket, base gasket, and valve cover gasket for a full top end rebuild.

Q: Is the piston pre-assembled with rings? A: The piston rings are included but not pre-installed; you will need to gap and install them according to manufacturer specifications.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.