645M04900 Wiseco .060 Piston Kit for Suzuki RM80 1991-2001 49.00 mm

Piston Kit for Wiseco 645M04900 .060 for Suzuki RM80

This Wiseco 645M04900 .060 piston kit is a 49.00 mm oversize piston assembly built for Suzuki RM80 models from 1991 through 2001, restoring top-end compression in a worn two-stroke engine.

Overview

The Wiseco 645M04900 .060 piston kit gives Suzuki RM80 riders a 49.00 mm oversize top-end solution for cylinders that have been bored and honed past stock. This piston kit pairs a forged piston with rings, wrist pin, and circlips so the rebuild goes together in one pass. It suits riders and mechanics rebuilding 1991 to 2001 RM80 engines who want a dependable replacement piston kit for Wiseco part number 645M04900.

Built For Performance

• Forged piston construction for strength under two-stroke combustion loads
• 49.00 mm oversize diameter, a .060 inch step over stock bore
• Kit includes piston, rings, wrist pin, and circlips for a complete top-end refresh
• Machined ring grooves and skirt profile suited to high-rpm small-bore engines
• Designed as a direct replacement for the 645M04900 part number
• Sized for cylinders already bored to match the 49.00 mm piston

Fits These Machines

• for Suzuki RM80 1991
• for Suzuki RM80 1992
• for Suzuki RM80 1993
• for Suzuki RM80 1994
• for Suzuki RM80 1995
• for Suzuki RM80 1996
• for Suzuki RM80 1997
• for Suzuki RM80 1998
• for Suzuki RM80 1999
• for Suzuki RM80 2000
• for Suzuki RM80 2001

On-The-Job Use

• Top-end rebuilds on a bored-over RM80 cylinder
• Motocross and trail riding where compression has dropped off
• Race engine refreshes between seasons
• Restoring a 1991 to 2001 RM80 project bike to running condition
• Shop work where the cylinder has already been machined to 49.00 mm

Specs At A Glance

Good To Know

Q: Will this piston fit a stock, unbored RM80 cylinder? A: No, this 49.00 mm piston is a .060 oversize and requires the cylinder to be bored and honed to match before installation.

Q: What parts come in the kit? A: The kit ships as a complete piston assembly with rings, wrist pin, and circlips so the top end can be rebuilt in a single job.

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