9 - BRAKING SYSTEM
208
FRONT BRAKE DISK DISTORTION
1. Check:
- Place a dial gauge against the disk (A) as shown, and
measure the disk’s deviation from centre as the tyre is tur-
ned (B) by hand.
- If the deviation from centre exceeds the service limit, re-
new the disk.
Wear disk:
0,2 mm
Outside that specified => Renew it.
BLEEDING THE BRAKE SYSTEM PIPE
The brake fluid has a very low compression coefficient, with
the result that almost all the movements of the brake lever are
transmitted directly to the calliper for braking. Air however
compresses easily. When air enters the brake system pipes,
the movement of the brake lever is partially used up in com-
pressing the air. This causes the lever to feel spongy and leads
to a loss of braking power.
BLEED AIR OUT OF THE BRAKE
SYSTEM WHEN THE BRAKE
LEVER FEELS SPONGY AFTER
CHANGING THE BRAKE FLUID,
OR WHEN THE BRAKE SYSTEM
PIPE HAS BEEN LOOSENED FOR
ANY REASON.
1. Remove:
- Bolts (1).
- Reservoir cover (2).
2. Fill:
- The reservoir with brake fluid up to the top reservoir line.
3. Pump:
With the cover removed, pump the brake lever slowly se-
veral times until no bubbles can be seen rising through the
liquid.
WARNING
1
2
Summary of Contents for GPR 125 Racing
Page 1: ...WORKSHOP MANUAL GPR 125 4 stroke ...
Page 169: ...6 COOLING SYSTEM 169 6 1 DIAGRAM OF THE SYSTEM ...
Page 170: ...6 COOLING SYSTEM 170 ...
Page 179: ...7 LUBRICATION SYSTEM 179 7 1 DIAGRAM OF THE SYSTEM ...
Page 180: ...7 LUBRICATION SYSTEM 180 ...
Page 192: ...8 CHASSIS 192 FITTING FRONT SUSPENSION ...
Page 202: ...9 BRAKING SYSTEM 202 9 BRAKING SYSTEM FRONT BRAKE REAR BRAKE 203 211 9 1 9 2 ...
Page 247: ...Rev 0 2009 ...