Suzuki drz 400E Service Manual page 161

6-30 CHASSIS
REAR WHEEL
Adjust the drive chain slack after installing the rear wheel
axle. ( 2-16 and 2-17)
Tighten the rear axle nut to the specified torque.
Rear axle nut:
100 N·m (10.0 kgf-m, 72.5 lb-ft).. for E-03, 28
110 N·m (11.0 kgf-m, 79.5 lb-ft).. for the other countries
NOTE:
After installing the rear axle nut, insert a new cotter pin into
the rear axle. (E-03, 28)
After remounting the rear wheel, pump the brake pedal a few
times to check for proper brake operation.