608M07650 Wiseco .060 Piston Kit for Kawasaki JS550 550 SX 76.50 mm Jet Ski

Piston Kit for Kawasaki JS550/550 SX

This Wiseco .060 oversize piston kit with part number 608M07650 is a 76.50 mm bore piston assembly that restores compression and performance in worn Kawasaki JS550 and 550 SX personal watercraft engines.

Overview

This Wiseco piston kit for Kawasaki JS550 and 550 SX models provides a .060 inch oversize replacement piston at 76.50 mm bore for engines that need a refresh after wear. The piston kit for Kawasaki JS550/550 SX delivers dependable compression and durability for recreational riders and rebuilders working on older stand-up watercraft. It is built for riders who want a trustworthy top-end replacement without hunting down obsolete factory parts.

Built For Performance

• Wiseco forged piston construction for strength under high RPM load
• .060 inch oversize bore at 76.50 mm to correct worn cylinder walls
• Part number 608M07650 for straightforward identification
• Designed for the Kawasaki JS550 and 550 SX engine platform
• Kit includes piston, rings, wrist pin, and circlips for a complete top-end job
• Precision machining for consistent fit and sealing

Fits These Machines

• for Kawasaki JS550
• for Kawasaki 550 SX

On-The-Job Use

• Top-end rebuilds on stand-up personal watercraft
• Restoring compression on high-hour engines
• Boring out a scored or worn cylinder to the next oversize
• Recreational lake and river riding
• Vintage watercraft restoration projects

Specs At A Glance

Good To Know

Q: Do I need to bore my cylinder for this piston? A: Yes, a .060 oversize piston requires the cylinder to be bored and honed to 76.50 mm for proper clearance. Confirm your cylinder has enough wall thickness before machining.

Q: Is this kit ready to install out of the box? A: The kit supplies the piston, rings, wrist pin, and circlips, but you should check ring end gap and piston clearance during assembly. Always follow the manufacturer torque and break-in recommendations.

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