| Firstly check that the 30A fuse between the charging system and the battery hasn't blown. If that's OK disconnect the yellow alternator wires and check the ouput.
If you have a 2 wire (single phase) alternator connect your meter, set for AC volts across the 2 wires and start the bike. You should get approx 15V per 1000rpm. ie 45V at 3000rpm etc.
If it is a 3-wire (3-phase) alternator connect the meter across any 2 wires and start the bike. Again you should get an AC reading, I don't know the figures to expect but I would think maybe 10V per 1000rpm. Then disconnect ONE meter wire and move it to the other alternator wire. You should get a similar output as the first pair. Finally move the OTHER meter wire back to the first alternator wire. Once again you should see a similar output.
If all 3 phases produce the same or very nearly the same output then the alternator is OK. If any one phase produces significantly less than the others then it is duff.
Finally whether a single phase or a 3 phase NONE of the windings should make a connection to earth.
I don't know if any of the above makes sense to you but I'm happy to explain further if needed.  | 
Hybrid Mode
