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!