2007 Yamaha Apex Factory Service Manual, Page 130Get this manual

2007 Yamaha Apex Factory Service Manual, Page 130

DRIVE CHAIN HOUSING 4Install: Shift rod 5Adjust: Shift rod length a Adjustment steps: Move the shift lever to the "FWD positionS
Loosen the locknuts Turn the shift rod so that shift rod free play is mm (in direction where can be shortened appropriately)