Voltage Regulator

[alantf]

I think you've made a grave mistake. Don't forget that you'll be pushing anything up to 80 amps into the starter motor. The "thin" wiring to the plug will not be able to take anything like that, and will burn out. You need to use a regular set of jump leads (with the THICK cable) between the two batteries. The thin wire that you see in the bike's starter circuit is merely to operate the solenoid that closes a heavy contact in the starter circuit. Take a look at the thick cable that goes to the bike's starter motor (front right of the engine) and you'll see what I mean.

BTW, the fuse box is under the saddle. Remove the saddle, then lift out the tool carrier, then you'll see it.