Gilera Runner RST 50 SP, Service Station Manual, Page: 76 / 183

4) Check the integrity of the sliding blocks of the
contact plate.
- Check that the internal bushing shown in the fig-
ure is not abnormally worn and measure inside
diameter « A ».
- Measure outside diameter « B » of the pulley slid-
ing bushing shown in the figure.
CAUTION
DO NOT LUBRICATE OR CLEAN THE BUSHING.
Characteristic
Driving pulley / Maximum diameter:
20.12 mm
Driving pulley/ Standard diameter:
20.021 mm
Driving pulley bushing/ Diameter maximum:
XXX mm
Driving pulley bushing/ Standard diameter:
20 -0.020/-0.041mm
Refitting the driving pulley
- Manually move the movable driven half-pulley
away by pulling it towards the clutch unit and insert
the belt observing the direction of rotation of the
first fitting.
N.B.
IT IS GOOD PRACTICE ALWAYS TO FIT THE BELT SO
THAT THE WORDS CAN BE READ IN CASE IT DOES NOT
SHOW A FITTING SIDE.
- Reassemble the unit parts (roller housing unit
with bushing, washer, stationary half pulley, belt
cooling fan with intake, washer and nut).
N.B.
REPLACE THE NUT WITH A NEW ONE AT EVERY REFIT
CAUTION
UPON FITTING THE DRIVING PULLEY UNIT IT IS OF UT-
MOST IMPORTANCE THAT THE BELT IS FREE INSIDE IN
ORDER TO AVOID WRONG TIGHTENING AND CONSE-
QUENTLY DAMAGING THE CRANKSHAFT KNURLING.
Specific tooling
020451Y Starting ring gear lock
Engine
Runner RST 50 SP
ENG - 76