Lot 331: 1961 Norton 350cc Navigator

The Navigator was the first derivative of the all-new Jubilee 250 twin that had been introduced in 1958. Designer Bert Hopwood’s original conception had called for integral cylinder barrels and ’heads, but convention won the day and separate components were used in production. Built in unit with the four-speed gearbox, this modern-looking engine was installed in a Francis-Barnett derived frame with fabricated ‘down-tube’. Towards the end of 1960 the 350cc Navigator was announced. The motor was bore and stroked and the cylinder block became a one-piece casting. Otherwise changes were few, while the cycle parts were up-rated with the Roadholder front fork and 8” diameter brake. Presented in running order, this example is offered with one old expired MoT and Swansea V5.