Sunbeam 1928 Model 9 500 cc 1 cyl ohv



Sunbeam  1928   Model 9     493 cc OHV  frame # D 3439  engine #  L 2435

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.   
The Model 9 soon got a reputation as a very fast and very reliable sports tourer  and 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.  
A new feature for 1928 was the oil pump that was placed  inside the engine behind a bulge on the timing case.
This purposeful looking mount still has its original finish and  oozes character so to speak!