Yamaha 4GY-W0042-00-00 - Master Cylinder Kit is a genuine Yamaha part. It is an original equipment replacement part for select Yamaha ATVs and motorcycles.

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Key Features & Benefits

• Genuine Yamaha OEM part, number 4GY-W0042-00-00.
• Fits 6 Yamaha models from 1984 to 2006.
• Direct replacement for the original part on the listed Yamaha models.

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Fits These Yamaha Models

• RZ350 - 1984-1985
• TTR250 - 1999-2006
• YFM350U Big Bear 2x4 - 1996
• YFM350X Warrior - 1987-1989
• View More - see the Fitment tab for full compatibility details

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Frequently Asked Questions

What is Yamaha part 4GY-W0042-00-00?

4GY-W0042-00-00 is a genuine Yamaha master cylinder kit for select Yamaha ATVs and motorcycles.

Is 4GY-W0042-00-00 a genuine Yamaha part?

Yes, 4GY-W0042-00-00 is a genuine Yamaha OEM part.

Which Yamaha models fit 4GY-W0042-00-00?

This part fits the RZ350 (1984-1985), TTR250 (1999-2006), YFM350U Big Bear 2x4 (1996), YFM350X Warrior (1987-1989), plus 2 additional models. View the full fitment list in the Fitment tab to confirm your 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.