Harley Davidson 1947 “U” 1209 cc side valve V-twin frame & engine # 47U3717
For 1937 the HD engineers redesigned the Big Twin range: frame and cycle parts of the newly introduced OHV ‘Knucklehead’ were used as the basis for the new 1209cc and 1303 cc models U and UH. An important new feature was the introduction (finally!) of dry sump lubrication. The “U” was the 5.0:1 low-compression type; the standard compression was 5:1. Power output of the U was 32.5 hp @ 4200rpm and its top speed was 135km. The new models proved themselves as reliable and dependable machines and gave their owners every satisfaction from the start and continued to do so for many years. Improved and updated annually throughout the late 1930s and 1940s, the U and UL models finally disappeared from the range at the end of 1948.
A 1947-only feature was the Bull-Neck frame with its oval section steering head. The gearchange was changed round again so that first was at the back of the gate. Amongst other minor modifications were the red Speed ball tank badges and the Tombstone tail lamp. (Source: Matthias Gerst).
This restored and road-registered mighty U comes with completely overhauled engine (+60 oversize pistons), carburettor and gearbox. She is fitted with a reconditioned magneto and a brand new 12V dynamo. A new primary belt kit is part of the equipment and many small parts have been renewed. Four colour choices were available for the US; export models were finished in Olive Green. This machine has the Skyway Blue option. Only 422 Us were produced in 1947.