Yamaha 7B3-11635-00-00 - Piston (0.25MM O-S) is a genuine Yamaha part. This engine part is one of the internal components that keep the engine running as designed. Ordering by part number 7B3-11635-00-00 ensures you receive the exact component Yamaha lists for its location.

---

Key Features & Benefits

• Replaces worn, scored, or damaged engine components.
• Installs in the position shown in the Yamaha engine parts diagram.
• Built to Yamaha's specification for its engine location.
• Size designation 0.25MM O-S as listed by Yamaha; confirm the required size with service manual measurements.
• Sold under Yamaha part number 7B3-11635-00-00.

---

Frequently Asked Questions

What is Yamaha part 7B3-11635-00-00?

7B3-11635-00-00 is the Yamaha part number for the Piston (0.25MM O-S), a genuine Yamaha part. It replaces a worn or damaged engine component with the specified Yamaha part.

What does the 0.25MM O-S size on part 7B3-11635-00-00 mean?

O-S marks an oversize part and U-S an undersize part. Yamaha lists 7B3-11635-00-00 as 0.25MM O-S, which is used when the mating part has been machined or worn to match. Measure and confirm the required size using the Yamaha service manual.

How do I confirm 7B3-11635-00-00 fits my Yamaha?

Model fitment is not listed for part 7B3-11635-00-00 on this page. Compare the part number against the Yamaha parts diagram for your model and year, or confirm with a Yamaha dealer using your model or VIN 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.