I'd stop worrying about little things like that and get it well sorted first.
The silencer is one of those pride and clarke repro "brooklands" cans that were popular some years ago with the look-a-like crowd.
Years ago I fitted one to a cobbled up from spares bike, its sole asset was that it acted like an echo chamber instead of a silencer and made a lovely racket; [according to whether you were riding on it or being deafened by it as I rode past]
Having looked at the photo of your bike, I am going to be hard and say its not a bad little bike, but if I wanted to go where I think you want to go,I wouldn't start from there.
A decent period set of bars,those are horrible, to take inverted levers and a straight pull throttle plus the lights you want could easily cost you as much as the bike if you wanted to go strictly original.
The correct non inverted levers should be solid brass, easily 150-200 for a genuine used set, you should beware of, and avoid indian made crap, although you can get good UK made inverted sets, or from the guy in Czech republic.
If it was my bike I'd get a period magdyno, there is one for overhaul on ebay now at 40£, and a small period lamp, junk the brooklands fake and repaint the tank in a correct style and colours.
Its not a bad little bike, ride it.
I am very very biased against the VMCC and just because they say its one year or another I would not take it as holy writ, they'll approve almost anything for cash.