Harley-Davidson H-D XLCR 61ci
![]() Date of Manufacture: 1978 Engine Size: 1000CC The history of Harley-Davidson is a long and illustrious one and far too vast for these few pages. There are many excellent books on the subject of the Motor Company at most book stores for those who wish a more complete history. Since the engine is one of the reasons, if not the main reason, the company is so well recognized I will give a brief history of the most famous of their engine designs, the 45¼ air cooled V-Twin. The first H-D configuration of V-Twin the company produced was in 1909. A few different V-Twin configurations emerged from that initial design but today's engine is an advanced derivative of the 'Knucklehead' first introduced in 1936. The 1000cc and 1200cc Knucklehead engines were produced until 1947 and were the first H-D engine with a combination of a 45¼ air cooled V-Twin with push rod actuated overhead valves and a dry sump lubrication system. 1967 Yamaha YCS1 Adler M200 Ariel Square Four Benelli Tornado BMW R27 BMW R51 BMW R51/3 BMW R75/5 BSA Gold Star Ducati 750S Ducati 851 SP1 Ducati Monza Ducati Pantah Ducati Sebring Garelli Mosquito Harley-Davidson H-D XLCR 61ci Hercules Wankel Honda 305 Dream Indian Boardtracker Indian Chief Innocenti Lambretta IZH Planeta Sport Jawa OHC Kawasaki Mach III Mars Stella Matchless G80 CS Moto Guzzi Eldorado Moto Morini MV Agusta Nimbus with Bender sidecar. Norton Dominator NSU 250 NSU Max Puch Rickman-Triumph Metisse Rudge Scott TT Suzuki T-10 Triumph Bonneville Triumph TRW Velocette Thruxton Victoria Aero Victoria Bergmeister Vincent Rapide Series C Whizzer
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