Fitting The Reed Valve - Derbi GPR 125 Racing Workshop Manual

F F
ITTING THE REED VALVE ITTING THE REED VALVE
N.B.
BEFORE FITTING, CHECK THAT THERE ARE NO CRACKS,
DISTORTIONS OR BREAKAGES ON THE REED PETALS. IF
THERE ARE, THEY MUST BE REPLACED IN THE FOLLOWING
WAY:
- REMOVE THE SECURING SCREWS FROM THE HEIGHT
LIMITER AND FROM THE INLET VALVE PETALS.
- CHECK THAT THERE ARE NO CRACKS IN THE PETALS'
SECURING BASE. IF THERE ARE, RENEW THE REEDS.
To refit the reed valve, proceed in the reverse order to dis-
mantling, paying special attention to the correct positioning
of the height limiter and the reed (with the bevels matching).
The elimination of the height limiter and the type of reed
used will modify the performance of the engine and may
make it less reliable.
Check the reed cage O- ring and replace it if damaged.
Valve thickness:
0.5 mm.
Height of the stop plate:
8.8 mm.
Valve flexing limit:
0.5 mm.
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