Vincent Black Prince Vincent Black Prince The Vincent Black Prince was a British motorcycle made between 1954 and 1955 by Vincent Motorcycles. A year before the factory closed in 1955, Vincent produced the enclosed range of Vincent Black Knight and Black Prince. Philip Vincent described it as a "two-wheeled Bentley", and the enclosed Vincents attracted a lot of attention at the November 1954 Earls Court show. Quality problems with early production of the glass-fibre mouldings necessitated a replacement supplier causing delays. The last Black Prince left the Vincent production line on Friday, 16 December 1955. Falling sales of the Series C Vincent motorcycles
Vincent Black Shadow bolted to a slightly modified version of the Series C malleable iron steering head casting. This revised UFM no longer carries oil and so a separate oil tank is fitted. Due to extensive use of aluminium alloy, weight for the complete bike is kept to a relatively light . The standard handlebar on all models of HRDs and Vincents is the black enamelled `HRD straights'. Series B and C bars are 7/8 inches in diameter and 25 inches long with the ends bent back at 20°. Series D bars are 1½ inches longer. The Black Shadow could be had in