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A motorcycle fork connects a motorcycle's front wheel and axle to its frame, typically via a yoke, also known as a triple clamp, which consists of an upper yoke joined to a lower yoke via a steering stem, a shaft that runs through the steering head, creating the steering axis.
A motorcycle fork is the portion of a motorcycle that holds the front wheel and allows one to steer. For handling, the front fork is the most critical part of a motorcycle. The combination of rake and trail determines how stable the motorcycle is. The 'fork' on a motorcycle consists of multiple components.
The top of the forks are connected to the motorcycle's frame in a triple tree clamp (known as a "yoke" in the UK), which allows the forks to be turned in order to steer the motorcycle. The bottom of the forks carries the front wheel's axle. On conventional telescopic forks, the lower portion or fork bodies ("fork sliders" in the UK), slide up ...
Trail can also vary as the suspension activates, in response to braking for example. As telescopic forks compress due to load transfer during braking, the trail and the wheelbase both decrease. [18] [self-published source?] At least one motorcycle, the MotoCzysz C1, has a fork with adjustable trail, from 89 to 101 mm [3.50 to 3.98 inches]. [19]
One of the earliest examples was the 965cc motorcycle produced by Louis Janoir in 1920, which used pressed steel for the frame, rear swinging arm, and the front forks. The frame may be entirely pressed (Ariel Arrow), or may have just a pressed aft section connected to the steering head by a conventional steel tubular spine (Honda Super Cub).
1968 BMW R60US with conventional telescopic fork Telescopic fork in upside down design, with stanchions at the bottom.. Conventional telescopic forks invariably have a pair of fork tubes, or "stanchions", at the top, clamped to a triple tree (also called a triple clamp or a yoke), and the sliders are at the bottom, attached to the front wheel spindle.
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The front forks were also unusual, with short leading links to carry the wheel, pivoting on rubber-in-torsion spring units (later known as the 'Banana Leading Link' front fork. Motorcycle production began in the autumn of 1953 and the new models featured a unique frame with the steering head and a massive front down member combined in a large ...