Gilera Runner Purejet 2007, Workshop Manual, Page: 36 / 257

Engine
Engine overheating
ENGINE OVERHEATING
Possible Cause Operation
No coolant in the cooling circuit Restore the level
Incorrect air bleeding Repeat the operation
Thermostat remains closed Replace
Fluid leak in the radiator Replace the radiator
Loss of fluid from the system Servicing the system
Coolant leaks from crankcase draining hole Replace coolant sealing ring on half-crankcase from transmis-
sion-side
Shaft support bearings water rotor command and mixer locked. Replace the shaft complete with bearing
Breakage of mixer belt Replace belt
Transmission and brakes
Clutch grabbing or performing inadequately
FAULTY CLUTCH
Possible Cause Operation
Tear or irregular functioning
Ensure the masses move at the touch of a finger
and return as normal.
Ensure there is no grease on the masses.
Ensure the seals work correctly (area of work at
the centre).
Ensure the clutch bell is not scored.
Check:
Rpm at start of drag: 4,000 revs per min.
Rpm on full throttle with rear wheel braked (3"÷ 6"
max.): 7000 - 7500 revs per min.
WARNING
NEVER ALLOW THE ENGINE TO REV WITHOUT THE CLUTCH BELL.
Insufficient braking
BRAKE SYSTEM
Possible Cause Operation
Insufficient braking Check wear of brake pads (1.5 mm MIN).
Check brake discs are not worn, scored or de-
formed.
Check the correct level of liquid in the pumps and
replace brake fluid if necessary.
Check there is no air in the circuits; if necessary,
bleed the air.
Check that the front brake calliper moves in axis
with the disc.
Troubleshooting
Runner Purejet
TROUBL - 36