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Underbone and miniature motorcycles often have a three to five-speed foot-shift lever, but the clutch is automatic (usually a centrifugal clutch). This type of clutchless (no manual clutch) transmission still must have the gears shifted manually by the rider, and the system is commonly known as a semi-automatic transmission.
The idea of an American cruiser styled motorcycle featuring a flat six engine came from Josef Boyd. The Valkyrie engine is a 1,520 cubic centimetres (93 cu in) liquid-cooled , horizontally opposed flat-six engine shared with Honda's Gold Wing 4th generation model, unlike the V-twin engine commonly found on "cruiser" style motorcycles .
The original Servi-Cycle design had the engine drive the rear wheel by belt, with no transmission or clutch, requiring the engine to be shut off while the cycle is at rest. [8] In 1941, a pedal-operated clutch was added. [10] By 1950, Simplex added a belt-type automatic transmission.
Cushman scooters featured an automatic centrifugal clutch, which allowed the rider to twist the right grip to accelerate. Oddly, the throttle twisted forward during acceleration, opposite the usual pattern in most other motorcycles and scooters. Cushman claimed 75 mpg ‑US (3.1 L/100 km; 90 mpg ‑imp), and advertised penny-a-mile operating ...
An early example of a semi-automatic motorcycle transmission was the use of an automatic centrifugal clutch in the early 1960s by the Czechoslovakian manufacturer Jawa Moto. [83] Their design was used without permission in the 1965 Honda Cub 50 , which resulted in Jawa suing Honda for patent infringement and Honda agreeing to pay royalties for ...
Honda VTX1800 motorcycle engine. Making amends for years of underperforming V-twins, Honda set out to produce a cruiser with the biggest CID ever and so designed a big bike with a muscular looking body that was long and low to the ground, featuring significant rake and trail. [12]
The University of North Carolina has agreed to pay new football coach Bill Belichick $10 million a year, according to a term sheet the university released Thursday afternoon.. While the agreement ...
The YF60's(quad), YT60's(atv), MJ50's, and PW50's engines were all derived from the QT50's engine and all parts are interchangeable though some parts are slightly different, for example all model's right side crankcase half have right side trailing arm mounts, except for the QT50. Most of the parts for the QT50 are still available from Yamaha ...