Chris Vincent's 1958 National Championship-winning NorBSA grasstrack sidecar outfit. A Manx Norton powered by a BSA A10 engine and gearbox. The outfit was lowered by using 16 inch wheels instead of 19, but the road-race origins remain clear, being still fitted with clip-on handlebars and rear-set foot-rests. Nortons with BSA engines were known as Norbsa, NorBSA and sometimes Nor-Beesa.