Sym GTS 250 Service Manual page 201

17. Electrical System
Inspection on ignition coil
Remove the luggage box.
Disengage the connector of the ignition coil and
the spark plug cap.
Measure the resistance between the terminals of
the primary winding.
Standard resistance: 0.17±10% Ω
Remove the cap from the spark plug and measure
the resistance between the spark plug and the
primary winding.
Standard resistance:
Without cap 9 ± 20% KΩ
With cap 14.1 ± 20% KΩ
Replacement on ignition coil
Loosen 2 screws and replace the ignition coil if
necessary.
Inspection of pulse generator
Disconnect the coupler of the pulse generator and
measure the resistance between the terminals of
green/white and blue/yellow.
Standard resistance: 480~550Ω
Please refer to the Section 10 for disassembly of
coil.
17-10
To this chapter contents
Ignition coil
Spark plug cap
Pulse generator coupler