40071M05400 Wiseco Std Piston Kit for Yamaha Raptor 125 2011-2013 54mm 13:1

Wiseco Std Piston Kit for Yamaha Raptor 125

This Wiseco standard piston kit is a rebuild component for the Yamaha Raptor 125, cross-referencing OEM part 40071M05400 with a 54.00 mm bore and 13:1 compression ratio.

Overview

The Wiseco Std Piston Kit for Yamaha Raptor 125 delivers a complete top-end solution for riders rebuilding the 2011-2013 Raptor 125 engine. This piston kit restores compression and bore fit with a 54.00 mm standard piston and a 13:1 compression ratio. It suits ATV owners and shops handling routine top-end service on the Raptor 125 platform.

Built For Performance

• Forged aluminum piston built for small-displacement ATV engines
• Standard 54.00 mm bore size matching the factory cylinder
• 13:1 compression ratio for responsive power delivery
• Cross-references OEM part 40071M05400
• Kit includes piston, rings, pin, and clips for a complete install
• Engineered for the Yamaha Raptor 125 platform

Fits These Machines

• for Yamaha Raptor 125 (2011-2013)

On-The-Job Use

• Top-end rebuilds after compression loss or ring wear
• Scheduled engine refresh during off-season maintenance
• Restoring factory performance on high-hour Raptor 125 quads
• Trail and recreational ATV service work

Specs At A Glance

Good To Know

Q: Does this kit fit the stock Raptor 125 cylinder without boring? A: Yes, it is a standard 54.00 mm piston designed for the factory cylinder, so no boring is required when the bore is within spec.

Q: Is a higher-octane fuel needed with the 13:1 compression ratio? A: A 13:1 ratio typically calls for premium pump fuel to avoid detonation, so check your local octane ratings before riding.

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