4811M10200 Wiseco Big Bore Piston Kit for Yamaha Grizzly 660 2002-2008

Wiseco Big Bore Piston Kit for Yamaha Grizzly 660

This Wiseco big bore piston kit for Yamaha Grizzly 660 rebuilds the top end with a larger bore, referencing part 4811M10200 for fitment.

Overview

This Wiseco big bore piston kit for Yamaha Grizzly 660 is built for riders rebuilding a worn or scored top end and wanting more displacement. The kit carries part number 4811M10200 and pairs a forged piston with rings, pin, and clips for a complete cylinder refresh. It suits anyone doing a top-end overhaul on a 2002-2008 Grizzly 660.

Built For Performance

• Forged piston construction for strength under load
• Big bore sizing increases displacement over stock
• Ring set matched to the piston for a proper seal
• Wrist pin and clips included for a complete rebuild
• Machined skirt profile for smooth cylinder travel
• Heat-treated alloy resists the demands of trail riding

Fits These Machines

• for Yamaha Grizzly 660 (2002-2008)

On-The-Job Use

• Top-end rebuilds after low compression or oil burning
• Restoring power on a high-hour utility quad
• Trail and hunting season prep for a tired engine
• Bore refreshes when the cylinder needs reworking

On-The-Job Use

• Top-end rebuilds after low compression or oil burning
• Restoring power on a high-hour utility quad
• Trail and hunting season prep for a tired engine

Specs At A Glance

Good To Know

Q: Does a big bore kit require cylinder machine work? A: Most big bore kits need the cylinder bored and honed to match the new piston size. Confirm the required bore spec with a machine shop before assembly.

Q: What else should I replace during a top-end rebuild? A: Gaskets, seals, cam chain, and valve components are commonly replaced while the top end is apart. Check wear on each before reinstalling.

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