646M04800 Wiseco Piston Kit for Yamaha YZ80 1993-2000 48.00 mm .040

Wiseco .040 Piston Kit for Yamaha YZ80

This Wiseco .040 overbore piston kit for Yamaha YZ80 (cross-reference 646M04800) measures 48.00 mm and is built to restore top-end compression on worn or bored-out cylinders.

Overview

This Wiseco .040 piston kit for Yamaha YZ80 is a 48.00 mm overbore top-end component that replaces a worn piston and refreshes cylinder sealing. The kit is intended for riders and mechanics rebuilding a YZ80 engine that has been bored to the next oversize. Cross-referenced under part 646M04800 for straightforward parts matching.

Built For Performance

• 48.00 mm bore size for .040 overbore cylinders
• Forged construction for strength under high-rpm loads
• Designed for two-stroke top-end rebuilds
• Cross-referenced to part 646M04800
• Kit supplied with piston and matching components

Fits These Machines

• for Yamaha YZ80 1993
• for Yamaha YZ80 1994
• for Yamaha YZ80 1995
• for Yamaha YZ80 1996
• for Yamaha YZ80 1997
• for Yamaha YZ80 1998
• for Yamaha YZ80 1999
• for Yamaha YZ80 2000

On-The-Job Use

• Top-end rebuilds on YZ80 motocross bikes
• Bored-out cylinders that need an overbore piston
• Routine piston replacement during engine refresh
• Race prep for older two-stroke machines

Specs At A Glance

Good To Know

Q: Does the kit include a piston only? A: Wiseco piston kits typically include the piston, rings, wrist pin, and clips, so confirm contents with the listing before ordering.

Q: Will this fit a standard bore cylinder? A: No, this is a .040 overbore piston at 48.00 mm and requires a cylinder bored or honed to match.

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