To check the drive chain slack

1. Place the motorcycle on the sidestand.

   When checking and adjusting the drive chain slack, there should be no weight on the motorcycle.

2. Shift the transmission into the neutral position.

3. Measure the drive chain slack as shown.

   

   1. Drive chain slack

   Drive chain slack:

   25.0–35.0 mm (0.98–1.38 in)

4. If the drive chain slack is incorrect, adjust it as follows. NOTICE: Improper drive chain slack will overload the engine as well as other vital parts of the motorcycle and can lead to chain slippage or breakage. If the drive chain slack is more than 35.0 mm (1.38 in), the chain can damage the frame, swingarm, and other parts. To prevent this from occurring, keep the drive chain slack within the specified limits.

To adjust the drive chain slack

Consult a Yamaha dealer before adjusting the drive chain slack.

1. Loosen the axle nut and the locknut on each side of the swingarm.

   

   1. Drive chain puller
   2. Axle nut
   3. Drive chain slack adjusting bolt
   4. Locknut
   5. Alignment marks

2. To tighten the drive chain, turn the drive chain slack adjusting bolt on each side of the swingarm in direction (a). To loosen the drive chain, turn the adjusting bolt on each side of the swingarm in direction (b), and then push the rear wheel forward.

   

   1. Drive chain slack adjusting bolt
   2. Locknut

   Using the alignment marks on each side of the swingarm, make sure that both drive chain pullers are in the same position for proper wheel alignment.

3. Tighten the axle nut, then the locknuts to their specified torques.

   Tightening torques:

   Axle nut:

   190 N·m (19 kgf·m, 140 lb·ft)

   Locknut:

   16 N·m (1.6 kgf·m, 12 lb·ft)

4. Make sure that the drive chain pullers are in the same position, the drive chain slack is correct, and the drive chain moves smoothly.