what's your battery voltage at? because lights and such aren't working, it points to a possible bad battery.

 

Even if the battery is bad wouldn't everything still come on once it's running?

 

so you have absolutely nothing when the bike is running?

 

Correct.
It runs just fine if I push start it but still no electronics.

 

I don't have a 450, but do you have access to a wiring diagram? I'd still check the battery to be sure, but you also could have a loose/disconnected ground somewhere.

 

Most of these old twins won't run on a bad or low battery, much less start by a kicker or trying to bump-n-go them. I would assume they should, but because it does run, perspective from a seasoned Honda Head is needed.
Personally I am thinking the main key switch, I dunno if a regulator or rectifier could cause this for sure but it feels right.......the rectifier acts as a one way flow valve for the electrical system, but is technically speaking under constant voltage. When they go bad, they either let no voltage pass through at all, or the voltage is not stopped at all and thus a battery goes dead for "No Apparent Reason" in a day or two.

The rectifier only controls the Voltage Outbound of the charging system that is needed to run the lights without exploding bulbs, or charge the battery without boiling it. So in theory a disconnected or blown rectifier "COULD" possibly cause this issue as easily as a moody key switch.

 

Wiggle your key while its running. See the headlight come one or at least blink?

EDIT: IIRC (no promises ), my motorcycle will run if I disconnect the battery (IOW, it is different than the OLD old Hondas). If that is the case, I would expect the OP's motorcycle to behave in a similar fashion.

Regards,

 

Wiggling did nothing for me. I wiggled the hell out of everything I could think of.
I've got 13V at the battery AND main fuse. 0V at Headlight and Tailight Fuse.

 

Since your electrical system is TOTALLY independent to your bike running, you need to trace the power from the battery to ignition switch to each component and find the 'break'. The rectifier or battery don't come into play when you bump start it. Do you have a wiring diagram for it? A honda service manual?

 

A wire going into the back of the ignition cylinder came unsoldered. Got it, thanks!