Yamaha 18U-11631-00-A0 - Piston (Std) is a genuine Yamaha part. It is an original equipment replacement part for select Yamaha motorcycles and scooters.

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Key Features & Benefits

• Genuine Yamaha OEM part, number 18U-11631-00-A0.
• Fits 2 Yamaha models from 1980 to 2025.
• Direct replacement for the original part on the listed Yamaha models.

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Fits These Yamaha Models

• PW50 - 1981-1983, 1985-1987, 1990-1999, 2001-2006, 2008-2009, 2012-2025
• QT50 - 1980

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Frequently Asked Questions

What is Yamaha part 18U-11631-00-A0?

18U-11631-00-A0 is a genuine Yamaha piston (std) for select Yamaha motorcycles and scooters.

Is 18U-11631-00-A0 a genuine Yamaha part?

Yes, 18U-11631-00-A0 is a genuine Yamaha OEM part.

Which Yamaha models fit 18U-11631-00-A0?

This part fits the PW50 (1981-1983, 1985-1987, 1990-1999, 2001-2006, 2008-2009, 2012-2025) and QT50 (1980). Confirm the exact model and year before ordering.

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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.