235M05400 Wiseco .080 Piston Kit for Yamaha MX100 1979-1983 54.00 mm

Wiseco .080 Piston Kit for Yamaha MX100

This Wiseco .080 overbore piston kit for Yamaha MX100 dirt bikes measures 54.00 mm and is identified by Wiseco part 235M05400 for a bored-out top-end rebuild.

Overview

This Wiseco piston kit for Yamaha MX100 models provides a .080 overbore replacement to refresh worn or damaged top ends. The 54.00 mm piston, listed under 235M05400, fits engines that have been bored to match. It suits riders and mechanics rebuilding a 1979 to 1983 MX100 who need a reliable oversize piston kit.

Built For Performance

• 54.00 mm oversize piston
• .080 overbore size
• Wiseco forged construction
• Kit number 235M05400
• Includes piston, rings, wrist pin, and circlips
• Precision-machined for two-stroke engines

Fits These Machines

• for Yamaha MX100 (1979-1983)

On-The-Job Use

• Top-end rebuilds on bored cylinders
• Refresh of high-hour MX100 engines
• Off-road and trail bike repairs
• Workshop restoration of vintage machines

Specs At A Glance

Good To Know

Q: Does this kit fit a stock cylinder? A: No, this is a .080 overbore piston, so the cylinder must be bored to the matching 54.00 mm size.

Q: What comes in the kit? A: The Wiseco kit includes the piston, rings, wrist pin, and circlips for a complete top-end install.

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