BSA Rocket Gold Star: out of the archive

BSA’s classic pre-unit supersports 650 was only manufactured in 1962 and 1963 and has inspired hundreds of enthusiasts to build replicas. So how do you know if you’re looking at a real RGS? At the end of the production run for the 650 pre-unit motor, just before the A65 was introduced, BSA’s customers were clamouring for a top of the…