Sunbeam 1925 M1 350cc 1 cyl sv



Sunbeam 1925  2 ¾ Hp, 347 cc side valve, frame  R 21209   engine 239-22214

The Wolverhampton based firm of John Marston earned fame for their superb bicycles in the early years of the last century. 
In 1912 their first motorcycle was presented, a 350 cc  side valve model ( 75x 79 bore and stroke) with a 2 speed gearbox. 
Soon the capacity was increased to 500cc, and also models with proprietary V-twin engines were made.  
Sunbeam motorcycles gained fame for their very high standards of workmanship, their speed and their reliability: The TT was won several  times in the nineteen twenties. 
The 2 ¾ model was redesigned to 70x 90 longstroke configuration and  presented again in 1923, this time with 3 speed gearbox.. 
Production of this light Sunbeam stopped in 1930.