Yamaha Genuine OEM Standard Piston (Size C) 2002-2004 YZ125
Maintain your engine's peak performance with this Genuine Yamaha OEM Standard Piston. This is a Size C piston, precision-engineered to meet the factory tolerances of the 2002–2004 YZ125. Unlike generic aftermarket options, this genuine part ensures the correct thermal expansion and skirt clearance required for high-RPM 2-stroke operation.
Key Specifications
- Bore Size: Standard (STD)
- Specific Piston Diameter: 53.96 mm (Size C)
- Engine Type: 125cc 2-Stroke
- Material: High-quality aluminum alloy with factory-spec tolerances
- Part Number: 5NY-11631-00-C0 (Replaces/Interchanges with 5NY-11631-01-C0)
Vehicle Fitment
This part is specifically designed for the following models:
- Yamaha YZ125: 2002, 2003, 2004
- Yamaha Race Karts: 2002–2003 YZ125PSK and YZ125RSK Shifter Kart engines
Important Notes for Buyers
- Selective Sizing: Yamaha uses A, B, C, and D sizing for their standard bore cylinders. Size C is used to match specific cylinder bore codes or to account for very minor wear while remaining within "standard" limits. Please verify your cylinder code before purchasing.
- What’s Included: This listing is for the piston only. To complete your top-end rebuild, you will also need the piston ring (5NY-11611-00-00), wrist pin, and circlips (sold separately).
- Authenticity: This is a 100% Genuine Yamaha part in original factory packaging. Avoid the risks associated with low-quality imitations by using OEM components.
selling as pictured.
more than welcome to pick up at shop in butler pa & save shipping.
030526 jy