electrical help

[Noodles]

My nc29 has some sort of electrical issue.
The battery loses charge over 3 to 4 days even if ridden everyday and eventually doesn't have enough power to turn the bike over fast enough for it to start, i have tried a new regulator but this has changed nothing.
one day i started the bike and left it to idle for 5 mins then turned it off, i tried to restart it straight away but would not turn over fast enough.
When running battery shows about 13 volts but no more than 13.6 when revved.
If i disconnect negative terminal i get a draw of 0.36 volts between the negative pole and lead.
Could it be a faulty battery or do i need to look into it further?
Can anybody help please?

[gullarm]

You need to remove the plug that connects to the regulator/rectifier and check the voltage across the 3 yellow wires to check if the genny is generating enough power.

You should get well over 14V when revving.

1) unplug the cable from the reg/rec
2) get a volt meter and set to AC range
3) rev bike and check voltage across yellow cables 1 + 2 then 1 + 3 then 2 + 3
4) at 4-5000rpm the volts should read around 50V AC across any of the 3 wires
5) if its less then 50V your gen has gone pop, one coil may be down so check em all