Disc Brake -Air Bleed - Sym JET 4 R 50 Series Service Manual

12. Brake System

Disc Brake -Air Bleed

Tightly hold the brake lever and open the drain
valve around 1/4 turns, and then close the valve.
Caution
Do not release the brake lever before the
drain valve is closed.
Always check the brake fluid level when
carrying out the air bleeding procedure to
avoid air enters into the system.
Slowly release the brake lever, and wait for a few
seconds until it reaches its top position.
Repeat the steps 1 and 2 until there is no air
bubble at the end of the hose.
Tightly close the drain valve.
Make sure the brake fluid is in the UPPER level of
the master cylinder, and refill the fluid if necessary.
Cover the cap.
12-6
Air bubble
Front brake
Drain valve
Drain hose
Drain valve