2007 Yamaha Apex Factory Service Manual, Page 79Get this manual

2007 Yamaha Apex Factory Service Manual, Page 79

GEAR SELECTION 5 Torque cam (secondary spring seat) Identification mark INSP ADJ B Effects C Part no D Cam angle E Identification
mark F Standard G Quicker upshifting during acceleration 8FA-17604-00 51-43_ 47_ 45_ 43_ 41_ 39_ 8BVFA 8BV71 8BV51 8BV31