Generic XOR 50 ccm, Руководство по обслуживанию

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WARNING
：
Brake fluid, if it leaks, will interfere with safe running and immediately
discolor painted surfaces.
Check the brake hoses for cracks and hose joints for leakage before
riding.
Brake pads
Wearing condition of brake pads can be checked by
observing the limit line marked on the pad. When the
wear exceeds the limit mark, replace the pads with
new ones.
Bleeding air from the brake fluid circuit
Air trapped in the fluid circuit acts like a cushion to
absorb a large proportion of the pressure developed by
the master cylinder and thus interferes with the full
braking performance of the brake caliper. The
presence of air is indicated by “sponginess” of the
brake lever and also by lack of braking force.
Considering the danger to which such trapped air
exposes the machine and rider, it is essential that, after
remounting the brake and restoring the brake system
to the normal condition, the brake fluid circuit be
purged of air in the following manner:
Fill up the master cyliner reservoir to the upper end
of the inspection window. Replace the reservoir cap
to prevent entry of dirt.
Attach a pipe to the caliper bleeder valve, and insert
the free end of the pipe into a receptacle.
Bleed air from the bleeder valve.
Squeeze and release the brake level several times
in rapid succession. And squeeze the lever fully
without releasing it. loosen the bleeder valve by
turning it a quarter of a turn so that the brake fluid
runs into the receptacles: the will remove the
tension of the brake lever causing it to touch the
handlebar grip. Then, close the valve, pump and
squeeze the lever, and open the valve. Repeat the
process until the fluid flowing into the receptacle no
longer contains air bubbles.