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Bike geometry parameters: wheelbase, steering axis angle, fork offset, and trail. Bicycle and motorcycle geometry is the collection of key measurements (lengths and angles) that define a particular bike configuration. Primary among these are wheelbase, steering axis angle, fork offset, and trail.
The Indian Scout FTR750 is a competition-only motorcycle engine made by Indian Motorcycle for flat track racing. It is a fuel-injected , liquid-cooled, four-valve-per-cylinder V-twin . [ 1 ] A single-pin crankshaft riding on plain bearings carries side-by-side steel connecting rods. [ 2 ]
This had suited Harley Davidson well with their side-valve 750cc K-series V-twins. The AMA raised the limit for ohv engines to 750 cc for 1969 in the flat track class. BSA/Triumph supplied a few triple based flat trackers to selected riders to use on mile circuits, but the triples were too wide and heavy and the riders soon reverted to using twins.
The Harley-Davidson KR or KR750 was a 45.125 cu in (739.47 cc) displacement V-twin engine racing motorcycle made by Harley-Davidson from 1953 through 1969 for flat track racing. It was also used in road racing in the KRTT faired version. When the KR was first introduced, it dominated motorcycle racing in the United States.
The combination of these two opposite torques creates a resulting yaw torque on the front wheel, and its direction is a function of the side-slip angle of the tire, the angle between the actual path of the tire and the direction it is pointing, and the camber angle of the tire (the angle that the tire leans from the vertical). [9]
Track racing is a form of motorcycle racing where teams or individuals race opponents around an unpaved oval track. There are differing variants, with each variant racing on a different surface type. The most common variant is Speedway which has many professional domestic and international competitions in a number of countries.
American Flat Track is an American motorcycle racing series. [1] The racing series, founded and sanctioned by the American Motorcyclist Association (AMA) in 1954, originally encompassed five distinct forms of competitions including mile dirt track races, half-mile, short-track, TT steeplechase and road races .
The Earles fork is a variety of leading link fork where the pivot point is behind the front wheel, which is the basis of the Earles' patent. [3] Patented by Englishman Ernest Earles in 1953, the design is constructed of light tubing, with conventional 'shock absorbers' mounted near the front axle. The Earles fork has a very small wheelbase ...