SG250 Owner’s and Service Manual
www.CSCMotorcycles.com
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Assembly is the reverse of disassembly. If you need bulbs or any other lighting parts, please call CSC at 909
445 0900.
Charging System
This section of the Owner’s and Service Manual addresses maintenance of the SG250 charging system.
You might have a charging system problem if the battery is dead or the bike is hard to start. It’s more
likely this is just a battery problem, so the first thing to do is to check the battery (see the SG250
battery maintenance section of this Manual).
If you have ruled out a defective battery, the next thing to check is the charging circuit.
Put a multimeter on the battery and measure the voltage
when the engine is revved. It should be between 13.8 and
14.5 VDC. If the voltage is above 14.5 VDC, the rectifier is
defective and it must be replaced.
The rectifier and the CDI are located beneath the fuel
tank. You will need to remove the seat and fuel tank to gain
access to these items. If you need a rectifier or a
CDI, please call us at 909 445 0900.
If the battery voltage is below 13.8 volts when the engine is
revved, more analysis is required.
The next step is to measure the output of the charging
system. Check for charging system AC voltage and
resistance. Find the charging circuit harness, and with the
engine running , measure the AC voltage between all three
leads. At idle, it should be 12 VDC. With the engine at
maximum rpm, it should be 60 VDC.
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