-JdK- We've been contacted by Olof who is looking for the dimensions of a positive stop mechanism for his 1931 CS1 Norton. It has a three-speed Sturmey Archer box fitted. Please contact us when you can help. His story is as follows:
"Above a picture of my bike probably short after the war around 1946-48. It had been resprayed Maroon red and the wheels in Ivory. The CS1 started as a racing project in the early 70s. After the original fenders were found in an attic, it was suddenly an almost complete original bike. That's how it came into my possession but dismantled down to the smallest detail.
I first test-drove it in 2015 and found it very pleasant to ride apart from the original Norton oil leaks from the cam housing and the annoying gear mechanism (below). One detail that has made both previous owners and me wonder is the many satin chromed small parts. Screws, nuts, footpeg details and fork links. They look to be Norton factory quality, mysteriously.
Otherwise, I discovered during the work that the rims and lamp housings are date stamped 1930. The rear hub is Enfield with original spokes but new nipples and the front hub is Horton with new spokes and nipples. The original saddle is still there but not mounted. The front fork is Norton's own with numbers according to the factory information.
According to the factory it was equipped with foot change. For the moment I use a TOR aftermarket mechanism. This is rather clumsy. I have managed to get descriptions and spare part pictures of the SA positive stop mechanism but no dimensions. I would be very thankful if anyone could assist with the dimensions. My workshop is quite complete and I believe that manufacturing a replica is entirely possible."