790M08150 Wiseco Piston for Yamaha Wave Runner XL700 81.50mm .020

Wiseco .020 Piston for Yamaha Wave Runner XL700

This Wiseco .020 oversize piston (OEM cross-reference 790M08150) is an 81.50mm bore replacement component that restores compression and top-end performance to your Yamaha Wave Runner XL700 engine.

Overview

This Wiseco .020 piston for Yamaha Wave Runner XL700 is an 81.50mm oversize component that returns lost compression to a worn personal watercraft top end. The oversize piston for Yamaha Wave Runner XL700 matches the 790M08150 reference, letting you bore a scored cylinder slightly and refit a fresh piston. It suits riders and mechanics rebuilding a 1999-2004 Yamaha Wave Runner XL700.

Built For Performance

• 81.50mm bore, .020 inch over standard, for use after a light cylinder bore
• Wiseco forged piston construction for durability under high rpm PWC loads
• OEM cross-reference 790M08150 for accurate match to the XL700 790M engine family
• Machined to precise tolerances for reliable compression and sealing
• Intended as a top-end rebuild component for personal watercraft use

Fits These Machines

• for Yamaha Wave Runner XL700 1999
• for Yamaha Wave Runner XL700 2000
• for Yamaha Wave Runner XL700 2001
• for Yamaha Wave Runner XL700 2002
• for Yamaha Wave Runner XL700 2003
• for Yamaha Wave Runner XL700 2004

On-The-Job Use

• Top-end rebuild after minor cylinder scoring or ring wear
• Boring out a worn XL700 jug to accept a .020 oversize piston
• Restoring lost compression on a high-hour personal watercraft
• Recreational lake and coastal riding with a refreshed top end

Specs At A Glance

Good To Know

Q: Why choose a .020 oversize piston instead of stock? A: A .020 oversize piston is used when the cylinder needs a light bore to clean up wear or scoring, giving a true surface for a proper ring seal.

Q: Does this piston come with rings, pin, and clips? A: Piston assemblies of this type are commonly supplied with the matching hardware, so confirm the exact contents of the listing before ordering for your XL700 rebuild.

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