This 1924 Sunbeam Model 6 is a rare, early example (with dummy rim type brakes and beaded edge tyres) of Sunbeam's well-known and very succesful model, called 'Long-Stroke'.

The iconic 77 x 105.5 side valve engine was first seen at the French Grand Prix of 1921. Although it was a side valve engine, but because of its bore and stroke dimensions - with the stroke being 105.5 mm, Sunbeam had many successes regarding this model (was in production for 17 years – the longest of any Sunbeam motorcycle models). The 1922 TT was won by Alec Bennett on a Longstroke – the last side valve to win a TT.

The 1924 Longstroke was based on the TT winning machine. It is fitted with high compression piston, special cams and light reciprocating parts. In the catalogue from 1924, Sunbeam advertised this model as "The Speedman's Machine" - "This model embodies the experience of  the Sunbeam designer and riders, whose successes in the T.T., Grand Prix and all the leading speed competitions are world renowned".

This Sunbeam Longstroke is a tidy older restoration, it is mechanically in a reliable condition - ready to ride. It is fitted with its original 3 speed gearbox, Bosch magneto, manual oil pump by Best & Lloyd, beautiful pan seat by Brooks. The primary chaincase is cast aluminium, the forks are Druid pattern, made under licence by Sunbeam.