Douglas 1933 “ Greyhound” 596 cc side valve flat twin frame # YF 2198 engine # EQ 2255
It is at the 1929 Olympia Show that the new S5 ( 500 cc ) and S6 ( 600 cc)models make their appearance.
Designed by Freddy Dixon, these are undoubtedly the most silent and flexible motorcycles available at this time.
The whole design concept is bristling with new ideas, even to the extent of following car design in certain aspects.
Who else can virtually guarantee a minimum of two years’ service without need for replacements? These are the “Dixon Douglas” models, with which his name will forever be linked.
For the first time a dry sump lubrication system is employed, without recourse to any external pipes.
Very long valve guides are fitted to the cylinder barrels and the cylinder heads are detachable, above the valve seatings.
Very long tappet guides are also used and all the valve gear is completely enclosed behind finned tappet covers.
The induction system is cast-in with the timing cover to ensure the necessary warmth after a cold start. A B.T.H “pancake” dynamo, mounted immediately above the induction system, operates the lighting circuit.
The dynamo is driven by gearing from the crankshaft and is specially made for the Douglas range.
The 600 cc model has bore and stroke dimensions of 68×82 mm. ( source: Jeff Clew, “The best Twin”)
For the 1931 and 1932 model years the S 5 and S 6 are improved in a number of details and get other model codes and for 1933 the company decides to use dogs’ names for some of the models: the 500 cc sv becomes the “Bulldog” and the 600 cc sv the “Greyhound” .
This very interesting machine comes in breathtaking authentic and unrestored condition and appears to have had little use by a careful owner.