INSPADJSecondary sheave springSecondary spring twist anglePart no.Spring rateN•mm/rad(kg•mm/rad)PreloadN/mm (kg / mm)(lb/in)ColorWiregaugemm (in)No. ofcoilsFreelengthmm (in)Outsidediametermm (in)Standard90508-500B1 6003 (613) 6.2 (0.63), 35.28 Brown 5.0 (0.196) 5.19 75 (2.95) 69.5 (2.736)90508-50746 7071 (721) 8.7 (0.89), 49.65 White 5.0 (0.196) 4.74 93.5 (3.68) 65.0 (2.559)90508-536A9 7147 (729) 7.3 (0.74), 41.44 Red 5.3 (0.209) 5.53 75 (2.95) 69.5 (2.736)90508-556A2 8314 (848) 8.5 (0.87), 48.72 Green 5.5 (0.217) 5.53 75 (2.95) 69.5 (2.736)90508-556A7 9460 (965) 10.21 (1.04), 58.24 Silver 5.5 (0.217) 4.86 75 (2.95) 69.5 (2.736)90508-60012 11876 (1211) 12.32 (1.256), 70.34 Pink 6.0 (0.236) 5.53 75 (2.95) 69.5 (2.736) RX10RTW,RX10RTRW90508-60007 12654 (1290) 13.45 (1.372), 76.84 White 6.0 (0.236) 5.19 75 (2.95) 69.5 (2.736) RXW10GTW,RX10MSWSeatSheave 0 3 6 91 10° 40° 70° 100°2 20° 50° 80° 110°3 30° 60° 90° 120°Torque cam (secondary spring seat) Identification markEffects Part no. Cam angle Identification mark StandardQuicker upshiftingduring accelerationQuickerbackshiftingunder load8FA-17604-00 51-43° 8BVFARX10RTW,RX10RTRW,RXW10GTW,RX10MSW8BV-17604-71 47° 8BV718BV-17604-51 45° 8BV518BV-17604-31 43° 8BV318BV-17604-11 41° 8BV118BV-17604-91 39° 8BV91GEAR SELECTION10