Size B (44.46mm) Piston Kit fits Kawasaki KX65 fits Suzuki RM65 STD Bore 44.50mm

Size B (44.46mm) Piston Kit for Kawasaki & for Suzuki

This Size B (44.46mm) piston kit fits Kawasaki KX65 and Suzuki RM65 dirt bikes, designed for a standard bore of 44.50mm. The piston kit includes a piston, rings, wrist pin, and circlips for a complete top-end rebuild. This replacement piston kit restores compression and performance in 65cc two-stroke engines.

Overview

This Size B (44.46mm) piston kit for Kawasaki KX65 and Suzuki RM65 provides a direct-fit replacement for engines with a standard bore of 44.50mm. It is intended for riders and mechanics rebuilding the top end of these popular 65cc two-stroke motocross bikes. The kit includes all components needed for a piston swap, ensuring reliable power restoration.

Built For Performance

• Precision-machined from high-strength aluminum alloy
• Includes chrome-plated rings for reduced friction
• Balanced weight for smooth operation at high RPM
• Complete with wrist pin and circlips for secure installation

Fits These Machines

• for Kawasaki KX65
• for Suzuki RM65

On-The-Job Use

• Top-end rebuild for motocross and off-road racing
• Restoring lost compression in high-mileage engines
• Performance maintenance for youth and junior bikes
• Pre-season engine freshening

Specs At A Glance

Good To Know

Q: Do I need to hone the cylinder before installing this piston? A: Yes, a light hone is recommended to ensure proper ring seating and to match the new piston to the cylinder bore.

Q: Is this piston compatible with aftermarket cylinders? A: It is designed for stock bore dimensions; for aftermarket cylinders, verify the bore size matches 44.50mm.

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