Gilera Runner Purejet 2007, Workshop Manual, Page: 37 / 257

Possible Cause Operation
Brake disc slack or distorted Check the locking of the brake disc screws; use a dial gauge
and a wheel mounted on the vehicle to measure the axial shift
of the disc.
Fluid leakage in hydraulic braking system Elastic fittings, piston seals or brake pump breakdown, replace
Brakes overheating
OVERHEATING BRAKES
Possible Cause Operation
Defective sliding of pistons Check calliper and replace any damaged part.
Brake disc slack or distorted Check the brake disc screws are locked; use a dial gauge and
a wheel mounted on the vehicle to measure the axial shift of
the disc.
Clogged compensation holes on the pump Clean carefully and blast with compressed air
Swollen or stuck rubber gaskets Replace gaskets.
Electrical system
Battery
BATTERY
Possible Cause Operation
Battery The battery is the electrical device in the system that requires
the most frequent inspections and thorough maintenance. Fre-
quently check that the fluid level fully covers the plates; other-
wise, restore the level adding distilled water (never use natural
water, even if it is drinking water) and check fluid density at the
same time. If the vehicle is not used for some time (1 month or
more) the battery needs to be recharged periodically. The bat-
tery tends to discharge completely within three months. If the
battery is fitted on a motorcycle, be careful not to invert the
connections, keeping in mind that the black ground wire is con-
nected to the negative terminal while the red wire is connected
to the terminal .
N.B.
KEEP IN MIND THAT THE VEHICLE CANNOT RUN WITHOUT A BATTERY AND THAT THE BAT-
TERY MUST NEVER BE DISCONNECTED WHILE THE VEHICLE IS RUNNING.
Turn signal lights malfunction
PROBLEMS WITH ELECTRICAL SYSTEM
Possible Cause Operation
Oil check doesn't work Check the turn indicator device and wiring.
Turn indicators not working Check the turn indicator device and wiring.
Steering and suspensions
Runner Purejet
Troubleshooting
TROUBL - 37