BSA 1930 Model S30-13 500 cc 1 cyl ohv

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BSA   ca 1930  4.93 HP   OHV de Luxe Model    S 30 –13  “Sloper”    frame# XH7123 engine# XP.2440

 

 

Presented in august 1926 for the 1927 season, the sloper  set the BSA company on the road to market domination and success. 
It was brilliant designer Harold Briggs, brought in from the Daimler car company, who designed the machine around a sporty and reliable 493 cc ohv (80×93 ) engine which inclined forward in the frame. 
Some typical car practice features Briggs used in his design were sump lubrication ( the crankcase was extended to form an oil reservoir holding 3 pints) and return springs within the pushrod tubes to keep the valve gear in constant touch with the cam profiles, giving exceptionally quiet operation. 
|The Sloper soon got a reputation as  a sporting but quiet motorcycle, a real trendsetter. Apart from the OHV model  two sidevalve slopers were marketed,  a 493 cc model and a 557cc model.
A new feature for 1930 was the forged steel backbone. 
This machine has been part of a Dutch museum collection and has been restored a number of years ago.