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1955 Sunbeam OHC Twin - 1-Page Vintage Motorcycle Article

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Seller: gallimoresgoods ✉️ (11,721) 99.9%, Location: Kingsport, Tennessee, US, Ships to: US & many other countries, Item: 255781301975 1955 Sunbeam OHC Twin - 1-Page Vintage Motorcycle Article. Yes we combine shipping for multiple purchases. Add multiple items to your cart and the combined shipping total will automatically be calculated. 1955 Sunbeam OHC Twin - 1-Page Vintage Motorcycle Article Original, Vintage Magazine Article Page Size: Approx. 9" x 12" (22.5 cm x 30 cm) Condition: Good One of the very best examples of an "all at once’’ motorcycle design—a machine which was actually conceived as a complete unit, is the ultra modern Sunbeam 500cc OHC Twin. Every part of this unique motorcycle was designed and built with due consideration to the appearance and function of the complete motorcycle; clean, smooth and streamlined—the 1955 Sunbeam is the result of painstaking and thorough engineering. Of prime interest to motorcyclists—the "works” of the Sun- beam are as different from "standard” motorcycle practice as can be imagined. The entire engine—gear unit consisting of large, smooth aluminum castings, is mounted, car fashion, in rubber to effectually dampen any vibrations. The engine itself is an ultra modern overhead camshaft twin of 500cc capacity mounted "fore and aft” in the frame. Crankcase and cylinders are a one piece aluminum alloy casting. Cylinders have removable iron alloy lin- ers. The cylinder head is likewise a one piece alloy casting with valve seat inserts. Camshaft drive is a totally enclosed, automatically tensioned roller chain. All cam and rocker gear are enclosed and specially lubricated. Connecting rods are aluminum alloy with car type big end inserts. The massive crankshaft is supported by a deep groove ball bearing at front and a specially designed shell type plain bearing at the rear. A Vokes "oil dip” type air cleaner is provided. Amal supplies the carburetors. Lubrication is handled by the car type wet sump system with pressure feed to big end and camshaft bearings. Ignition is car type coil with large generator driven directly off front of crank- shaft. Directly driven by the engine, a large single plate dry clutch transmits power to a heavy duty four speed gearbox. Shifting is accomplished with the foot operated positive stop lever. From the transmission rearwards drive is via shaft incorporat- ing a shock absorber and a needle bearing type universal joint. Final drive from shaft to wheel is by totally enclosed worm gear. The Sunbeam frame is an exceptionally heavy double tube duplex type with massive, hydraulically controlled telescopic forks and plunger rear springing. Unusual in a British motorcycle are the 450 x 16 front and 4.75 x 16 rear tires and 814" wide deep section fenders. Riding comfort is assured by a large, deeply padded and sprung solo saddle. Entire appearance of the Sunbeam is massive, yet the complete machine weighs only 430 lbs. dry. Utmost dependability, phenomenal operating silence and a 70 mph cruising speed make the Sunbeam ideal for touring, a happy choice for many motorcycle enthusiasts, veteran and beginner alike. Beautiful catalogs on this most interesting motorcycle are avail- able from the distributors, Hap Alzina, 3074 Broadway, Oakland, Calif.—BSA Incorporated, 639 Passaic Ave., N. J. 14802-5509-23
  • Condition: Used
  • Condition: Original, Vintage 1-Page magazine article; Good Condition

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