Yamaha 90171-10001-00 - Castle Nut is a genuine Yamaha part. It is an original equipment replacement part for select Yamaha ATVs.

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Key Features & Benefits

• Genuine Yamaha OEM part, number 90171-10001-00.
• Fits 42 Yamaha models from 1987 to 2026.
• Direct replacement for the original part on the listed Yamaha models.

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Fits These Yamaha Models

• YFA-1 Breeze125 - 1989, 1991-2004
• YFB250 Timberwolf 2x4 - 1992-1998
• YFM125 Grizzly - 2004-2008, 2010-2013
• YFM125 Raptor - 2011-2013
• View More - see the Fitment tab for full compatibility details

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Frequently Asked Questions

What is Yamaha part 90171-10001-00?

90171-10001-00 is a genuine Yamaha castle nut for select Yamaha ATVs.

Is 90171-10001-00 a genuine Yamaha part?

Yes, 90171-10001-00 is a genuine Yamaha OEM part.

Which Yamaha models fit 90171-10001-00?

This part fits the YFA-1 Breeze125 (1989, 1991-2004), YFB250 Timberwolf 2x4 (1992-1998), YFM125 Grizzly (2004-2008, 2010-2013), YFM125 Raptor (2011-2013), plus 38 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.