2010-2011 Yamaha RS Vector / RS Venture Service Manual, Page 91Get this manual
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CLUTCH Primary spring
Spring rate Nmm (kgfmm) 19.6 (2.00) 19.6 (2.00) 19.6 (2.00) 19.6 (2.00) 24.5 (2.50) 24.5 (2.50) 27.0 (2.75) 24.5 (2.50) 27.0 (2.75) 22.1 (2.25) 24.5 (2.50) 19.6 (2.00) 22.1