Matchless G9 AJS Model 20
Jul 23, 2018
4 minutes
WORDS BY OLIVER HULME
PICTURES BY GARY CHAPMAN AND DAVE CHATLEY
AJS AND MATCHLESS joined the move to the parallel twin layout for road bikes in 1948. The AJS race shop had been at work on bikes other than big singles since before the Second World War, building its supercharged water cooled V4 which was originally designed as a road bike before the conflict and introducing the unit construction dohc 500cc Porcupine racer in 1945. Yet the first AMC post-war twin offerings, the Matchless G9 and AJS Model 20, followed conventional lines, being two valves per cylinder ohv parallel twins in a smart cradle frame.
They appeared at the Earls Court Show in 1948, showing the G9 fitted with a dual seat and with
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