060843 | EXTENSION - CHAINGUARD - REAR - 1968-1970 - SELF COLOUR | C - - - |
66-67 650SS-Atlas had optional 2 part upper/lower fully enclosed chain guard
Yes the BSA ones are quite good. I have 3 BSA A-10 and I have one full chain case. It is not installed as it had a rough prior life and in need of repair to use it. It is certainly complex and comprehensive with a removeable rear sprocket end cap and a full gearbox sprocket shroud enclosure. It does not appear to be an oil bath.From norton bob's description, it does not seem that the fully enclosed Norton chaincases were oil tight. A fully enclosed oil bath chaincase, would be a blessing .... I had a buddy who had a BSA with an oil bath chain case .... i never knew him to ever adjust his chain tension, or ever wear out a chain.
Slick
Intresting, I've googled up the Raleigh Rudge chianguard to see an out line of it.If you want an example of a fully enclosed oilbath alloy primary case then the 1936 Rudge takes some beating. It also encloses the chain dynamo drive with safety slip device, a sealed dry clutch ,engine shock absorber, gearbox shaft sealing device ., inspection cover and drain plug , OH and a beautiful cast in logo, crossover gearchange and footrest mount. An absolute work of art.