Derbi GPR 125 Racing, Руководство по ремонту

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3 - MAINTENANCE
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TIE A PIECE OF WIRE TO THE
TIMING CHAIN TO PREVENT
IT FROM DROPPING INTO THE
ENGINE.
5. Extract:
- The 2 locking pins (8).
- The 8 bolts (9) from the camshaft bridge (loosen them
by following a cross pattern).
- The camshaft bridge (10).
- The inlet camshaft (11).
- The exhaust camshaft (12).
THE INLET CAMSHAFT BEARS
THE INSCRIPTION “A”.
THE EXHAUST CAMSHAFT
BEARS THE INSCRIPTION “S”
6. Extract:
- The shims with the incorrect settings and make a note of the
numbering (3 digit number) of the fitted shim (13).
7. Calculate:
- The appropriate shim according to the following calcula-
tion: New shim thickness = (B – A) + C (mm)
Where
A= indicated clearance (inlet or exhaust)
B = Value measured using the feeler gauge
C = Thickness of the fitted shim
Example (exhaust valve):
A = 0.20 mm (indicated or desired value)
B= 0,15 mm
C= 2,00 mm
Thickness of new shim = (0,15-0,20) + 2,00 = 1,95 mm
8
9
10
12
11
13
N.B.
N.B.