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The FJR1300AE/AS model has an electrically actuated gearshift and an EFM auto-clutch – together, Yamaha calls this system YCC-S. It is a semi-automatic transmission, so there is no hand-operated clutch lever. Instead, the YCC-S system allows the rider to shift using a set of manually-operated push-buttons on the left handlebar, or via the ...
The designers at Moto Guzzi were aiming the V1000 Convert at the US police motorcycle market and were the first to produce a big capacity automatic motorcycle with shaft drive. Moto Guzzi increased the pushrod-operated V-twin's bore and stroke to give a displacement of 949 cc (57.9 cu in), and replaced manual gearbox with a torque converter ...
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.
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 ...
In the early 1960s, Jawa invented the first automatic clutch for motorcycles. The centrifugal clutch was designed for Jawa 250/559 and 350/360. Because the clutch has been patented worldwide by Jawa and it was copied in the Honda 50 Cub motorcycle, Honda had to retreat, pay a fine, and pay a license fee for each motorcycle sold.
Automated manual transmissions can be semi-automatic or fully-automatic in operation. Several different systems to automate the clutch and/or shifting have been used over the years, but they will generally use one of the following methods of actuation for the clutch and/or shifting: hydraulic or electro-hydraulic actuation, [12] electro-mechanical, [13] pneumatic, [6] [14] [15] electromagnetic ...