I thought at first glance that was a Honda CD175 - a popular bike in my yoof.
The tank does look quite similar, but the motor looks pure Kwacker 2 stroke.
My second bike was a KH250 triple which went by the name of smelly Nellie. My fellow members of Southampton Uni MC used to joke that it doubled in value every time I filled the tank with petrol.
It was fitted with allspeed expansion chambers, made a hell of a racket and produced clouds of smoke. A mobile eco disaster indeed. It's handling wasn't great either, but I loved it. (Tho' not as much as the RD350LC which replaced it, which was soooo much better in every way).