ZONGSHEN ZS125-86 Service Manual page 52

[7] Apply a micrometer to measure the thickness
of the front brake disc. The maintenance limit is:
2.0mm.
Caution
I f t h e b r a k e d i s c t h i c k n e s s e x c e e d s t h e
maintenance limit of 2.0mm, it should be
replaced.
[8] Apply a dial indicator to measure the runout of
front brake disc. The maintenance limit is: 0.3mm.
Caution
If the brake disc runs out beyond the maintenance
limit: 0.3mm, it should be replaced.
[9] Check whether the brake pedal can return to
position normally and whether the free stroke of
brake pedal is too large or too small. Adjust the free
stroke of brake pedal to 20mm ~ 30mm.
[10] When the free stroke of the rear brake pedal is
too large or too small, adjust the free stroke of the
brake pedal by adjusting the nuts on the rear brake
lever.
[a] Adjust the adjusting nuts on the rear brake and
set the free stroke of the rear brake pedal to 20mm
~ 30mm.
[b] Tread the rear brake pedal for several times and
then release it. Rotate the rear wheel assembly to
check whether the rear wheel can rotate freely.
46
Measure the runout
Check the brake arm
Adjust the free stroke.
Measure the
thickness of the
brake disc
of brake disc