Charging System Over-Voltage/Under-Voltage:
I understand you don't have a battery...
* Possible Symptoms: Headlight dims or brightens excessively with RPM, headlight filament or headlight fuse blows intermittently, blinker and other bulbs give out unexpectedly.
* Probable Cause: Voltage regulator bad and/or battery defective, permitting charging system to vary power outside of expected range. Power variations damaging to various electrical components, including bulb filaments.
* Trouble Shooting & Corrective Actions:
- Using a voltage meter, check the voltage at the battery with the engine & ignition off (reading should be above 11.8 volts and below 13.2 volts). If readings are below 11.8 volts, remove battery and charge on a trickle-charger. After fully charging, check with a hydrometer and recheck voltage readings (should be 12.2 or higher after charging). If battery fails hydrometer check or voltage recheck after charging, replace with fresh battery before proceeding.
- Start engine on center stand, and recheck voltage at battery while varying RPM's (valid range should be 12.4 volts through 14.2 volts). If readings are under 12.2 or above 14.8 while at any RPM with engine running, replace voltage regulator and/or alternator/generator as needed. Note that most shops will replace both at the same time rather than replacing just the voltage regulator/rectifier pack (although the voltage regulator/rectifier pack is normally the part that goes bad).
- Further Troubleshooting (altenator/generator): remove primary leads to alternator/generator and check for continuity as per electrical diagram. If continuity can not be established, replace. If continuity is valid as required, replace only regulator/rectifier pack if voltage is out of range while engine is running and battery is in range with engine off.