I had a 1982 T140 version of this bike with a lot more stuff from the EU on it. A bit slow until I changed the final sprocket. Just another Pommy bike that was streets behind the CB750 Honda's of which I had a few of.
@bdkrivit yes,great ride.Had a lot of fun.After this I will need to get touch up paint.Found a supplier that has all makes,models and years of paint.RS in England and now thet supply the US.
sounds good . i dont think the noise is coming from the engine , sounds more like a loose nut around the tank abundant .. hard to tell on a vid . hope you got it sorted . . cheers