804M06750 Wiseco 1.10 mm Piston Kit for Yamaha YZ250 1999-2024 67.50 mm

Piston Kit for Yamaha YZ250

This Wiseco 1.10 mm piston kit is a 67.50 mm bore replacement piston assembly that brings compression and response back to two-stroke engines, and it cross-references 804M06750 for simple parts matching.

Overview

This 67.50 mm piston kit is made to refresh top-end performance on a two-stroke motocross engine. The kit provides a complete piston assembly option for riders and mechanics handling routine rebuilds or scheduled top-end service. It suits anyone who needs a reliable 1.10 mm oversize piston kit for Yamaha YZ250 applications.

Built For Performance

• 67.50 mm bore size for a 1.10 mm oversize fit
• Wiseco forged piston construction known for strength under high rpm
• Complete kit format covering piston, rings, and related top-end hardware
• Designed to restore compression lost to worn or scored pistons
• Cross-references part 804M06750 for straightforward lookup

Fits These Machines

• for Yamaha YZ250 1999
• for Yamaha YZ250 2000 to 2024 model years

On-The-Job Use

• Top-end rebuilds after piston wear or seizure
• Scheduled maintenance on race and trail two-strokes
• Bore cleanup jobs where an oversize piston is required
• Restoring lost compression and throttle response

Specs At A Glance

Good To Know

Q: Does this kit include rings and a piston pin? A: Wiseco piston kits typically ship as a complete top-end assembly with piston, rings, pin, and clips. Confirm the exact contents listed by the seller before ordering.

Q: Will this 67.50 mm piston drop into a stock cylinder? A: No, a 1.10 mm oversize piston requires the cylinder to be bored and honed to match. Measure your bore and confirm clearance specs before installation.

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