Wiseco Std Piston Crankshaft Gasket Set 47.50mm Bore for Yamaha YZ85 2002-2018

Wiseco Std Piston Crankshaft Gasket Set for Yamaha

This Wiseco Std Piston Crankshaft Gasket Set provides the piston, crankshaft, and gasket components required for a rebuild on a Yamaha YZ85, sized at a 47.50 mm bore.

Overview

This Wiseco Std Piston Crankshaft Gasket Set covers the core rebuild parts for the Yamaha YZ85, pairing a standard piston with a crankshaft and a full gasket set. The 47.50 mm bore keeps the cylinder at stock sizing for consistent engine behavior. It suits riders and shops doing a complete top-end and bottom-end refresh on 2002 through 2018 models.

Built For Performance

• Forged piston built for high-rpm two-stroke use
• Standard 47.50 mm bore keeps factory cylinder dimensions
• Crankshaft assembly included for bottom-end service
• Gasket set seals the engine during reassembly
• Components supplied as a matched set for consistent fit
• Suited to motocross and off-road riding conditions

Fits These Machines

• for Yamaha YZ85 2002
• for Yamaha YZ85 2003
• for Yamaha YZ85 2004
• for Yamaha YZ85 2005
• for Yamaha YZ85 2006
• for Yamaha YZ85 2007
• for Yamaha YZ85 2008
• for Yamaha YZ85 2009
• for Yamaha YZ85 2010
• for Yamaha YZ85 2011
• for Yamaha YZ85 2012
• for Yamaha YZ85 2013
• for Yamaha YZ85 2014
• for Yamaha YZ85 2015
• for Yamaha YZ85 2016
• for Yamaha YZ85 2017
• for Yamaha YZ85 2018

On-The-Job Use

• Full engine rebuilds on YZ85 motocross bikes
• Top-end and bottom-end service performed together
• Crankshaft replacement after bearing or rod wear
• Restoring stock compression after piston damage
• Off-season refresh before race season

Specs At A Glance

Good To Know

Q: Does this set cover both top and bottom end? A: The kit includes a standard piston, crankshaft, and gasket set so the main rebuild parts arrive together. Verify your model year and engine code before ordering.

Q: Is this a stock replacement or a performance upgrade? A: This is a standard 47.50 mm bore set matched to factory sizing for a stock-spec rebuild. It is not intended for big-bore applications.

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