Periodic maintenance and adjustment8-251234567891011124. If the drive chain slack is incorrect,adjust it as follows. NOTICE: Im-proper drive chain slack willoverload the engine as well asother vital parts of the motorcy-cle and can lead to chain slip-page or breakage. To preventthis from occurring, keep thedrive chain slack within thespecified limits.[ECA10572]EAU74260To adjust the drive chain slackConsult a Yamaha dealer before ad-justing the drive chain slack.1. Loosen the axle nut and the lock-nut on each side of the swingarm.2. To tighten the drive chain, turn thedrive chain slack adjusting bolt oneach side of the swingarm in direc-tion (a). To loosen the drive chain,turn the adjusting bolt on each sideof the swingarm in direction (b),and then push the rear wheel for-ward.TIPUsing the alignment marks on eachside of the swingarm, make sure thatboth drive chain pullers are in the sameposition for proper wheel alignment. 3. Tighten the axle nut, then the lock-nuts to their specified torques.4. Make sure that the drive chain pull-ers are in the same position, thedrive chain slack is correct, andthe drive chain moves smoothly.1. Drive chain slackDrive chain slack:20.0–30.0 mm (0.79–1.18 in)11. Axle nut2. Drive chain puller3. Drive chain slack adjusting bolt4. Locknut5. Alignment marksTightening torques:Axle nut:190 N·m (19 kgf·m, 137 lb·ft)Locknut:16 N·m (1.6 kgf·m, 12 lb·ft)1 2 3 45(a)(b)