Checking the clutch boss (Yamaha YZF-R1 Y(C))

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1. Check:

• Clutch boss splines. Damage/pitting/wear → Replace the clutch boss.

Pitting on the clutch boss splines will cause erratic clutch operation.

See this article in russian language

Article about repair motorcycles «Yamaha R1 YZF- Y(C)» (2009-2014): «Checking the clutch boss»: https://motoinstruction.ru/en/Yamaha/R1/YZFR1Y/engine/transm/115489 <a href="https://motoinstruction.ru/en/Yamaha/R1/YZFR1Y/engine/transm/115489">Checking the clutch boss</a> - article about repair motorcycles «Yamaha R1 YZF- Y(C)» (2009-2014) from section «Transmission». [url=https://motoinstruction.ru/en/Yamaha/R1/YZFR1Y/engine/transm/115489]Checking the clutch boss[/url] - article about repair motorcycles «Yamaha R1 YZF- Y(C)» (2009-2014) from section «Transmission».