AJS 1915 550 cc Model A side valve V-twin frame# 291 engine# 5872
The four Stevens brothers had been in motorcycle manufacturing since the final years of the 19th century, but only in 1911 their first complete ?AJS? motorcycle, a 298 cc twospeeder, was marketed. For the 1912 season their first V- twin, the model D, was brought out. In the 1914 Junior TT a magnificent first and second place was scored. The company moved to new premises at Graisely House, Wolverhampton. The 1915 range consisted out of three models; the sporty 2 ? HP single, the medium weight 4 HP ( 550 cc) twin model A and as top of the range the 6 HP model D. A new feature on all 1915 models was the so called ?AJS scientific frame? with straight top tube sloping from head to seat lug, eliminating the use of bent tubes. This gives the petrol tank a slightly wedged- shaped appearance. Brampton patent spring forks are used on both V-twin models. Some other features are: three speed countershaft gearbox, completely enclosed chains and internal expanding rear brake. An American Splitdorf magneto takes care of the ignition: the Bosch magneto was not available anymore for British manufacturers.
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