If it was manufactured in 1976, it’ll almost certainly be the Harley version. 1982 will be the date at first registration in the UK.
Worth doing an HPI check as a lot of the registration numbers and identities of the two stroke Harley’s ended up being used on larger engined HD customs.
Also worth researching spares availability for these bikes. I was looking at a nice SS175 earlier this year and after doing some research decided that the relative lack of spares availability, is probably why a lot of these bikes never get used and end up as garage ornaments.
Theres a reasonably active Facebook group “2 stroke Spaghetti Harley Riders” Looking at this particular group was what highlighted to me the less than straightforward situation regarding sourcing some spares for these bikes.
I’d be wary of any two stroke thats been laid up for a while and is advertised as needing attention to the carb to get it running right because of over revving. It might be an indication that the crank seals have gone hard.
Nice bikes, just need to look at any prospective purchase without rose tinted glasses on, give the bike a thorough inspection and expect some problems after purchase.