Sunbeam 1935 Model 9A 600 cc 1 cyl ohv

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Sunbeam  1935   Model 9a     599 cc OHV  frame #  6C/521/0 /1262  engine # 9C/519/0/2251

The first OHV production  Sunbeams were listed as the model 8 (350cc) and 9 (500cc) in 1924.
The model 8 with bore/stroke dimensions of 70×90 mm was an excellent sporty  tourer, but stayed  somewhat in the shadow of its  more glamorous big brother, the 80×98 mm Model 9, which stayed in production till 1939.  
From 1932 on a 600 cc version  ( Model 9A) was marketed , with engine dimensions of 88×98 mm, giving 599 cc. 
This machine was especially suited for fast sidecar touring.
New features for 1932 were: Sunbeam 4 speed gearbox and  a new fork with revised brake, a  tank top panel which holds Smith clock and oil pressure gauge and  a new rocker box – with feed pipe from the oil pump – with fully lubricated rocker gear.
The clutch  was  now operated with a quick thread on the front chain case, doing away with the typical Sunbeam bridge over the output sprocket.
Between 1932 and 1935 only minor changes took place; in 1936 the Model 9 got a Burman gearbox and in 1937 the Model 9A. 
This gentleman’s  motorcycle  has been well-restored some time ago.