40094M07700 Wiseco Std Piston Kit for Yamaha YZ250F 2012-2013 77.00 mm 14:1 CR

Std Piston Kit for Yamaha

This Wiseco standard piston kit for Yamaha is a complete top-end replacement, cross-referenced to OEM part 40094M07700, sized at 77.00 mm with a 14:1 compression ratio.

Overview

This standard piston kit for Yamaha delivers a complete top-end refresh with a 77.00 mm bore and 14:1 compression ratio. The kit for Yamaha YZ250F models includes the piston, rings, pin, and clips for a full rebuild. Riders and engine builders trust Wiseco for consistent, race-proven performance.

Built For Performance

• 77.00 mm standard bore size
• 14:1 compression ratio for strong power output
• Forged construction for high strength
• Complete kit with piston, rings, pin, and clips
• Cross-references OEM part 40094M07700
• Designed for four-stroke motocross engines

Fits These Machines

• for Yamaha YZ250F 2012
• for Yamaha YZ250F 2013

On-The-Job Use

• Top-end rebuilds
• Motocross and off-road riding
• Engine refresh after hours of use
• Race engine builds

Specs At A Glance

Good To Know

Q: What comes in the kit? A: The kit includes the piston, rings, wrist pin, and clips for a complete top-end job.

Q: Does the compression ratio matter? A: A higher ratio like 14:1 can require higher-octane fuel, so check your engine setup.

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