Search results
Results from the WOW.Com Content Network
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.
Semi-automatic transmissions were almost exclusively used in motorcycles and are based on conventional manual transmissions or sequential manual transmissions, but use an automatic clutch system. But some semi-automatic transmissions have also been based on standard hydraulic automatic transmissions with torque converters and planetary gearsets ...
Some (mostly smaller) motorcycles, and many scooters use either a continuously variable transmission, or a hydraulic automatic transmission. semi-automatic transmissions are also in use; where the driver's input is still required for shifting gears, but the clutch system is controlled and operated automatically.
Cutaway view of a 2007 Toyota AA80E hydraulic automatic Typical gear selector for an automatic transmission. An automatic transmission (sometimes abbreviated AT) is a multi-speed transmission used in motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions.
The manual transmissions follow the standard motorcycle design: a left-foot-actuated shifter and a left-hand-actuated clutch. [6] The semi-automatic transmission models use a paddle-shifter on the left-hand grip. The transmission is semi-automatic as it will automatically downshift as the vehicle slows, but upshifting must be manually performed ...
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.
Pages in category "Motorcycle transmissions" ... Semi-automatic transmission; Sequential manual transmission; Motorcycle shaft drive; Shaft effect; Slipper clutch;
Clay Ridley began experimenting with automatic transmissions in motorcycles in 1995, when building them for his sons as a hobby. [2] Although the vast majority of cars and light trucks sold in the U.S. use automatic transmissions, no two-wheeled vehicles larger than a scooter did, and so to capitalize on that market, he and his son Jay founded the Ridley Motorcycle Company in 1997, which ...