The above things have not happened yet, right?
So the bike is ready, but you aren't? 
First kick start after a build can be intimidating. All those negative thoughts come up. Got to forget about all the time and money you poured into it, and just do it.
Ignore if you are already familiar with Norton twins:
Turn the gas and ignition off and repeatedly kick it over with the plugs out until you get some dribble at the return pipe in the tank. (If you can see the return pipe.) If you know of a better way to prime the oil system do that instead. Once oil starts dribbling out of the return pipe reinstall the plugs, turn on the fuel, pull up the choke levers, get the crank/pistons just over the top of the compression stroke with the kick start, switch on the ignition, and try to start it.
Mikuni carburetors on the choke tend to run the idle RPM up kind of high, so be prepared to turn off the chokes and keep it running with the throttle until it settles into something like an idle. If you don't have any air leaks, the carburetors are synched, and the ignition close, the standard adjustments should let it run. If the cam and lifters are previously used and are already broken in, the engine break in can be done on the street. None of the 15 minute multiple sessions at 2500 RPM nonsense is required.
If it is wet out, don't ride it. Riding in the wet won't make you feel super manly if you go down in a turn on cold wet new tires. Well, never made me feel like more of a man anyway.
I was hesitant to post the above, because there is nothing new in my drivel, but did it anyway.
