Derbi GP1 50 cc, Workshop Manual

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3) Make sure that the rollers do not have marked facing on
the sliding surfaces and that the metal insert does not pro-
trude from the edges of the plastic cover.
4) Make sure that the contact plate sliding blocks are intact.
- Check that the internal bronze bushing shown in the figure
is not abnormally worn and measure inside diameter «A».
- Measure outside diameter «B» of the pulley sliding bushing
shown in the figure.
CAUTION
DO NOT LUBRICATE OR CLEAN THE BRONZE BUSHING.
Characteristic
Maximum allowable diameter:
20,12
mm
Standard diameter:
20,021
mm
R
EFITTING THE DRIVING PULLEY
- Manually move the mobile driven pulley by pulling it towards
the clutch unit and insert the belt keeping the rotation direc-
tion of the first assembly.
N.B.
IT IS ALWAYS A GOOD IDEA TO FIT THE BELT SO THAT THE
WORDS ARE LEGIBLE IN CASE THE BELT DOES NOT SHOW
AN ASSEMBLY DIRECTION.
- Reassemble the unit parts (roller housing unit with bushing,
washer, stationary half pulley, belt cooling fan with intake,
washer and nut).
Tighten the nut to a torque of 20 Nm and then finally tighten
90° with the specific tool preventing rotation of the drive pu-
lley.
R
EFITTING THE DRIVING PULLEY