Derbi GPR 125 Racing Workshop Manual page 139

- Connect the Multimeter (Ω x 1) to the ignition coil.
- Check the resistance of the coil secondary winding.
Secondary winding resistance:
7.9 ± 20 % a 20°C
5. Main switch (ignition key)
See the "INSPECTING THE SWITCHES" section.
6. Impulse coil resistance
- Disconnect the impulse coil connector from the electrical
system.
- Connect the Multimeter (x 100) to the impulse coil con-
nector.
Terminal (+)
Terminal (-)
- Check the resistance of the impulse coil.
Resistance of the impulse coil: 250Ω ±
250Ω ± 20% a 20°C
138
B
OTH CONFORM TO
SPECIFICATIONS
C
IRCUIT
White/Red Terminal
White/Blue Terminal
C
ONFORMS TO SPECIFICATIONS
Terminal (+) Orange / Green (1)
Terminal (-) Spark plug lead (2)
O
UTSIDE THAT SPECIFIED
Renew the ignition coil.
N
O CIRCUIT
Renew the main switch (ignition key)
O
UTSIDE THAT SPECIFIED
Replace the impulse coil.