I worked at Better Bikes from 1976 - 1981.

I remember that the R100CS originally came out with spoked wheels, but there was a major recall when spokes started breaking and the wheels were replaced with cast items.
One owner was that pissed off that he advertised his bike for sale in the local rag, the Evening News, stating that the bike had had "only 15 major faults since new"
When I started they had just ditched the Harley franchise and got the Kawasaki one. Shortly after they took on the BMW dealership, then Yamaha.
The two owners, Chris Martin and Robin Worral, had started the business by bringing over 300 Velosolex bikes from France (friction drive engines over the front wheel) to sell to students at Edinburgh uni. I remember Chris telling me that it took a couple of weeks before someone crossed over the door step
The business grew quite quickly after the Kawasaki dealership deal. A shop was opened in Kirkcaldy and another one in Glasgow. The Yamaha dealership meant that another shop was opened in Edinburgh.
Chris Martin left the business after a family bereavement, leaving Robin in charge. I think that was the begining of the end of the business. I never thought that Robin was really into bikes, he was more of a business man, and just saw bikes a way of making money.
I remember they also had franchises for Moto Morini, Moto Guzzi and Ducati. (and Vespa).
Good times.
PS Does anyone remember "World of Wheels", which opened for a short time near the Kings Theatre. I seem to remember that some popstar had a piece of that business.