Yamaha B2W-116A0-00-00 - 4-Stroke Piston Kit is a service part including piston, ring, circlips, and wrist pin for select Yamaha motorcycle applications.

---

Key Features & Benefits

• Genuine Yamaha kit — piston, ring, circlips, and wrist pin included
• High-quality forged aluminum piston construction
• Proven OEM fitment, durability, and reliability
• Restores factory compression and throttle response
• Straightforward drop-in replacement during a top-end rebuild
• Matched components eliminate bore/clearance guesswork

---

Fits These Yamaha Models

Yamaha Model	Compatible Years
WR450F	2021-2023
YZ450F	2020-2022
YZ450FX	2021-2023

---

Frequently Asked Questions

What is Yamaha part B2W-116A0-00-00?

B2W-116A0-00-00 is the Yamaha 4-Stroke Piston Kit, a service accessory part including piston, ring, circlips, and wrist pin.

What is Yamaha B2W-116A0-00-00 used for?

This part is used as a piston kit for maintenance and servicing of select Yamaha motocross and off-road motorcycles.

Which Yamaha models fit B2W-116A0-00-00?

This piston kit fits various Yamaha WR450F, YZ450F, YZ450FX, WR250F, YZ250F, and YZ250FX models from 2010 through 2026. Confirm the exact model and year before ordering.

---

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.