HYOSUNG COMET 125 Service Manual page 157

6-33 CHASSIS
Install the rear wheel.
After installing the drive chain to the rear sprocket, adjust
the drive chain.
Tighten both chain adjusting nuts securely.
Tighten the rear axle nut to the specified torque.
Rear axle nut : 90~140 N m (9.0~14.0 kg m)