4952M07700 Wiseco Std Piston Kit for Yamaha YZ250F 2008-2011 77 mm 13.5:1 CR

Std Piston Kit for Yamaha

This Wiseco standard piston kit for Yamaha is a complete top-end replacement, cross-referenced to OEM part 4952M07700, sized at 77 mm with a 13.5:1 compression ratio.

Overview

This standard piston kit for Yamaha delivers a complete top-end refresh with a 77 mm bore and 13.5:1 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 mm standard bore size
• 13.5:1 compression ratio for reliable power
• Forged construction for high strength
• Complete kit with piston, rings, pin, and clips
• Cross-references OEM part 4952M07700
• Designed for four-stroke motocross engines

Fits These Machines

• for Yamaha YZ250F 2008
• for Yamaha YZ250F 2009
• for Yamaha YZ250F 2010
• for Yamaha YZ250F 2011

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 13.5:1 ratio suits pump premium 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.