Derbi GPR 125 Racing, Workshop Manual

Page: 72 / 247

3 - MAINTENANCE
72
DETAIL SHOWING THE ALIGNMENT OF THE MARK (5) WITH
THAT EXISTING ON THE FLYWHEEL (6).
UP TO ENGINE NUMBER 7015,
THE MARK (6) (A CIRCLE) DOES
NOT EXIST.
ON THESE ENGINES (FROM 0001
TO 7015), THE MARK (6) IS A LINE
(7) WHICH HAS TO BE ALIGNED
WITH THE END OF THE ORIFICE.
DETAIL OF ALIGNMENT OF THE LINE (7) WITH THE END OF
THE INSPECTION THE ORIFICE (FROM ENGINE NOS. 0001 TO
7015).
3. Position:
- The locking pins (8) to ensure the alignment. In this situa-
tion, the cams should be positioned outwards.
AT TDC ON THE COMPRESSION
STROKE, THE BRIDGE ORIFICES
SHOULD COINCIDE WITH THOSE
OF THE CAMSHAFTS.
Ref. 864567
Set of camshaft locking pins (8).
4. Check:
- With a feeler gauge that the clearance between the cam
and the valve shim corresponds to the values indicated:
INLET VALVES: 0,10-0,15 mm (Height A)
EXHAUST VALVES: 0,15-0,20 mm (Height B)
Outside that specified => Adjust setting
Within that specified => Refit
8
5
6
7
N.B.
N.B.