Ah..., a half-fairing?
The yellow TBS looks to be fitted with what I think of as the Norton Commando road-going "race fairing"? Aka, the Rickman Commando racers.
Similar to this link:
http://www.norvilmotorcycle.co.uk/063935ATY.htm
The fairing was produced originally as the Rickman (Matisse) Avon fairing, and was fitted to a number of Brit and Matisse framed Japanese racers.
I guess with the position of our handlebars (rather than clip-ons) a half-fairing like the one fitted to the old Honda GB400/500 models would be good, but I don't know if they are available?
Geoff