Silk Engineering

George Silk developed a racing motorcycle by fitting a Scott engine into a Spondon frame.

They set up Silk Engineering and began providing a spares and repair service for Scott motorcycle owners.

Coolant in the cylinder jackets absorbed engine heat and rose convectively via a rubber tube to the radiator.

[3] The final drive chain was fully enclosed, with the upper and lower runs being encased in "telescopic" rubber gaiters.

Improvements from the Mk 1 included finned cylinder barrels, a redesigned seat, instruments and rear light nacelle.

Porting and timing revisions plus a higher compression boosted power to a more respectable 48 hp, but the price continued to rise.