Douglas 1933 D33 2cyl 600cc sv



Douglas   1933   “  Greyhound”   596 cc   side valve  flat twin frame #  FC 2192  engine # EV 1744

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. 
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” .
Notable features of this model are the tank top instrument panel, the screwed-on metal tank badges and the fully enclosed rear chain. 
1933  was a distressful year for the company and production of Douglas machines was very limited. 
Only a few machines of this type are known to exist. 
This very interesting machine comes in  breathtaking   concourse condition; the colour is darkish blue.