BSA B40 auto advance 10 degree brazed open flat track speedway C15
this is a 10 degree unit but the bob weights have been brazed open, this was on a 1964 ex flat track BSA B40 machine comes with centre bolt , the bike was imported back from America and had race number on.
the bob weight springs were removed and the weights spread out to full advance then brazed in place. The bike was and had the looks of a flat tracker (American speedway), so racing at full speed so may be of use to someone with a ceefer classic speedway bike, presumably done to remove bounce or weak springs
19-1804 19-1831 Lucas 54416405 B25 B44R C15 star 4CA 10 degree 1966-67 C15 Star B25 B44 roadster
selling off a lot of my old spares as downsizing my unit