Yamaha YA2-28158-02-03 - Main Bearing (U-S 0.25MM) is a genuine Yamaha part. It is an internal engine component built to Yamaha's specification. Confirm part number YA2-28158-02-03 against your Yamaha parts diagram before ordering.

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Key Features & Benefits

• Built to Yamaha's specification for its engine location.
• Replaces worn, scored, or damaged engine components.
• Installs in the position shown in the Yamaha engine parts diagram.
• Size designation U-S 0.25MM as listed by Yamaha; confirm the required size with service manual measurements.
• Sold under Yamaha part number YA2-28158-02-03.

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Frequently Asked Questions

What is the Yamaha Main Bearing (U-S 0.25MM) (YA2-28158-02-03)?

The Main Bearing (U-S 0.25MM) is a genuine Yamaha part sold under part number YA2-28158-02-03. This engine part is one of the internal components that keep the engine running as designed.

What does the U-S 0.25MM size on part YA2-28158-02-03 mean?

O-S marks an oversize part and U-S an undersize part. Yamaha lists YA2-28158-02-03 as U-S 0.25MM, 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.

Where does the Main Bearing (U-S 0.25MM), part YA2-28158-02-03, fit in the engine?

The Main Bearing (U-S 0.25MM) installs in the engine location shown for part YA2-28158-02-03 in the Yamaha parts diagram for your model.

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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.