Only 6-7V from stator

[vRSG60]

Wondered why my battery kept flattening. I thought it was a duff battery. I have 12V DC Wassel conversion.
But checking the voltage off the Wassel unit and I'm only getting 6-7 Volts. 8-9 Volts AC off one of the stator lighting wires and only 6-7 Volts off the other stator lighting wire.

No continuity reading if connected tot he 2 yellows back through the stator.

[coaster]

You should be getting way more that 12 volts AC out of the stator but you measure it across both of the lighting wires as the lighting coils are not connected to earth (that's what the other lighting wire replaces). The best way to measure your DC output is to connect across the battery terminals with a DC voltmeter. With the engine turned off you should get around 12.5 volts and this should rise when the engine is started and go to between 13 to 14 volts as the revs rise. The voltage will drop considerably with the lights on though and it is possible that you will get little or no charge going in if you ride around town a lot. I don't do much town riding but still need to top mine up with a mains charger from time to time. I'm basing this on my experience of Indian and an early BGM as well as my current home brewed stators with extra turns on the coils. The latest BGM's might be a bit better but probably not much.

[vRSG60]

Nope - 11.5 volts across battery engine running or not. Revving the engine makes no difference.

Bridging both lighting cables and measuring the voltage I get the grand total of 3.76 Volts

[coaster]

Nope - 11.5 volts across battery engine running or not. Revving the engine makes no difference.

Bridging both lighting cables and measuring the voltage I get the grand total of 3.76 Volts

Is that open circuit i.e. straight from the stator without connecting it to the Wassel? I'm pretty sure you can see well over 20 volts unregulated. If that's the case then I would check for a dry soldered joint and check that the insulation on the wires hasn't been nicked behind the stator (if that was the case you would read something to earth from the lighting wires on resistance). Lighting coils are usually pretty robust due to having a relatively small number of turns (around 70) of fairly heavy gauge wire which is why they only measure 1 or 2 ohms. However, nothing is infallible and I have heard cases of them burning out.

[vRSG60]

Thanks for your time (as always) Coaster. Took the flywheel of, again, I'm getting quick at this, and the soldered joint had come apart.
Re-solder and 14+ volts across the battery now.
Happy days, for another week.