805M04800 Wiseco .020 Piston Kit for Yamaha YZ85 2002-2024 48.00mm

Wiseco .020 Piston Kit for Yamaha YZ85

This Wiseco .020 overbore piston kit, part 805M04800, is a 48.00 mm piston assembly built to restore compression and top end power in Yamaha YZ85 engines from 2002 through 2024.

Overview

This Wiseco .020 piston kit for Yamaha YZ85 provides a 48.00 mm overbore piston built to renew top end performance after cylinder wear. Riders and shops rebuilding a YZ85 will find this kit supplies the piston needed to bring compression and throttle response back. It is aimed at anyone refreshing the top end on a 2002 through 2024 Yamaha YZ85.

Built For Performance

• 48.00 mm oversize piston for .020 overbore applications
• Forged construction for strength under high rpm loads
• Designed for Yamaha YZ85 2002 through 2024 models
• Kit includes piston, rings, wrist pin, and circlips
• Wiseco part number 805M04800 stamped for identification

Fits These Machines

• for Yamaha YZ85 2002
• for Yamaha YZ85 2003
• for Yamaha YZ85 2004
• for Yamaha YZ85 2005
• for Yamaha YZ85 2006 through 2024

On-The-Job Use

• Top end rebuilds on worn YZ85 cylinders
• Motocross and off-road race bike maintenance
• Restoring compression after honing or boring
• Shop rebuilds requiring an oversize piston

Specs At A Glance

Good To Know

Q: Is this an original Yamaha piston? A: No, this is a Wiseco piston kit made for Yamaha YZ85 applications, not an original equipment part. It is designed as a replacement for the listed models.

Q: Does the cylinder need machining for a .020 piston? A: A .020 overbore piston is sized for a cylinder that has been bored or honed to match, so measure your bore before ordering. Check that the cylinder is within spec for this oversize piston.

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