727M04200 Wiseco Piston Kit .080 for Yamaha YSR50 1987-1992 42.00 mm

Wiseco .080 Piston Kit for Yamaha YSR50

This Wiseco .080 piston kit for Yamaha YSR50 uses a 42.00 mm piston with OEM cross-reference 727M04200 for a precise top-end rebuild.

Overview

This Wiseco .080 piston kit is designed for the Yamaha YSR50 engine and provides a 42.00 mm oversize piston. The 727M04200 reference makes cross-checking straightforward. Riders rebuilding a worn YSR50 top end will find this kit fits the job.

Built For Performance

• 42.00 mm piston in .080 oversize
• Wiseco forged construction for durability
• Reference 727M04200 for easy cross-checking
• Ring and pin included for a complete top-end rebuild
• Designed for the Yamaha YSR50 engine platform

Fits These Machines

• for Yamaha YSR50 1987
• for Yamaha YSR50 1988
• for Yamaha YSR50 1989
• for Yamaha YSR50 1990
• for Yamaha YSR50 1991
• for Yamaha YSR50 1992

On-The-Job Use

• Top-end rebuilds on the Yamaha YSR50
• Oversize bore clean-up after cylinder wear
• Restoration projects requiring a fresh piston
• Performance tuning on the YSR50 engine

Specs At A Glance

Good To Know

Q: Does this piston kit require cylinder boring? A: Oversize piston kits typically require the cylinder to be bored to match the new 42.00 mm piston size.

Q: How do I confirm this fits my YSR50? A: Verify your engine displacement and bore, then match the 727M04200 reference and 42.00 mm size.

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