4764M08700 Piston Kit for Yamaha SR500 1978-1981 87 mm 9:1 CR Wiseco

Wiseco Std Piston Kit for Yamaha SR500

This Wiseco Std Piston Kit for Yamaha SR500 provides a forged replacement piston with rings, pin, and clips for top-end service, cross-referencing 4764M08700 at 87 mm bore with 9:1 compression.

Overview

This Wiseco Std Piston Kit for Yamaha SR500 is a forged piston assembly made for rebuilding a 500cc single-cylinder top end. The Wiseco Std Piston Kit for Yamaha SR500 brings sealing and compression back to spec at the original 87 mm bore size. It fits mechanics, restorers, and riders working on 1978 through 1981 SR500 engines.

Built For Performance

• Forged piston construction for durability under load
• 9:1 compression ratio suited to standard pump fuel
• 87 mm bore size matches the standard SR500 cylinder
• Kit includes piston, rings, wrist pin, and circlips
• OEM cross-reference 4764M08700 for easy lookup
• Precision-machined ring grooves for a consistent seal

Fits These Machines

• for Yamaha SR500 1978
• for Yamaha SR500 1979
• for Yamaha SR500 1980
• for Yamaha SR500 1981

On-The-Job Use

• Top-end rebuilds on tired or oil-burning SR500 engines
• Restoration projects returning an engine to stock spec
• Standard-bore refresh with a fresh piston and rings
• Everyday riding builds that call for moderate compression

Specs At A Glance

Good To Know

Q: Will this kit fit my SR500? A: It is listed for 1978 through 1981 Yamaha SR500 models with an 87 mm standard bore, so verify your model year and bore before ordering.

Q: Does a standard-size piston need cylinder work? A: A clean, correctly honed or bored cylinder is normally required to reach the proper piston-to-wall clearance.

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