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Also, having the steering working through the forks causes problems with stiction, decreasing the effectiveness of the suspension. The length of the typical motorcycle fork means that they act as large levers about the headstock requiring the forks, the headstock, and the frame to be very robust adding to the bike's weight.
The BMW K1200R is a naked supersport motorcycle manufactured between 2005 and 2008 by BMW Motorrad, producing a claimed 163 hp (122 kW) @ 10,250 rpm from its transverse-mounted 1,157 cc inline-four engine with torque of 94 lbf⋅ft (127 N⋅m) @ 8,250 rpm. [1] Acceleration to 60 mph (97 km/h) from a standing start is claimed to be 2.6 seconds.
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.
When BMW ended production of the R1200C lineup, Dr. Herbert Diess, then President BMW Motorrad, cited a prime reason for discontinuing the bike was the apparent unsuitability of the 1,170 cc (71 cu in), 61 hp (45 kW) engine to then current market tastes and the unavailability of a suitable engine for further development, but did not rule out BMW pursuing a reinterpretation of the cruiser idea ...
1968 BMW R60US with conventional telescopic fork Unusual "trailing bottom link" on a Honda Rune. 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.
The BMW R1200R (series K27) is a standard motorcycle introduced in 2006 by BMW Motorrad. [2] It replaces the R1150R, compared with which it has a 55 lb (25 kg) weight saving and 28% increase in power. [2] The air/oil-cooled flat-twin (boxer) engine produces 80 kW (109 hp) and features dual overhead camshafts.
The BMW R1200RT is a touring or sport touring motorcycle that was manufactured from 2005 to 2019 by BMW Motorrad to replace the R1150RT model. It features a 1,170 cc (71 cu in) flat-twin engine with a six-speed gearbox and shaft drive .
The BMW K1200GT is a sport-touring motorcycle made by BMW. The first generation K1200GT came out in 2003 and had a traditional “Brick” longitudinally mounted four cylinder engine. Criticisms of this model included its weight, lack of power, and poor ground clearance, but it still rated as a very comfortable and high-speed tourer.