Derbi GPR 125 Racing, Workshop Manual

Page: 73 / 247

3 - MAINTENANCE
73
ADJUSTING VALVE SETTINGS THAT ARE OUTSIDE
THAT SPECIFIED
Outside that specified => Dismantle the timing
STEPS TO FOLLOW TO DISMANTLE THE TIMING (continues
from Point 3 onwards)
1. Extract:
- The starter motor connector.
- The 2 bolts (1) securing the starter motor.
- The starter motor (2).
REMOVE THE STARTER MOTOR
TO AID IN EXTRACTING THE
TIMING CHAIN TENSIONER.
2. Extract:
- First of all the central timing chain tensioner bolt (3).
- The 2 bolts (4) securing the timing chain tensioner.
- The timing chain tensioner.
- The tensioner seal.
ON DISMANTLING THE TI-
MING, ALWAYS REMOVE THE
CENTRAL TIMING CHAIN BOLT
FIRST OF ALL. FAILURE TO DO
SO MAY LEAD TO SEVERE DA-
MAGE TO THE TIMING CHAIN.
3. Fit:
- The camshaft sprocket locking tool (5).
The camshaft sprocket locking tool:
Ref.
865259
4. Extract:
- The 2 bolts (6) from the camshaft sprockets.
- The camshaft sprockets (7).
2
1
3
3
4
5
6
7
CAUTION
N.B.