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BMW R1100S
The BMW R1100S is a sports motorcycle that was manufactured by BMW Motorrad between 1999 and 2005. Introduced some 25 years after the R90S, the company's first sports bike, the R1100S was the first BMW bike having clip-on handlebars, rearset footrests and a removable cowl to cover the pillion seat.〔 Producing nearly 100 hp, it has been described as a "sporty sports-tourer".
==Design==
The engine is a flat-twin "oilhead" that has air-cooled cylinders but oil-cooled heads. Derived from the BMW R1100RS, the 1,085 cc fuel-injected eight-valve engine is tuned for a maximum output of at 8,400rpm.〔〔 At the time of its introduction, it was BMW's most powerful boxer engine ever made, and the first mated to a six-speed transmission. The ohv engine has chain-driven camshafts mounted in the cylinder heads, operating the valves ''via'' short pushrods and rocker arms. Engines produced after 2003 had dual ignition, with two spark plugs per cylinder.〔Haynes Manual - "BMW 850,1100 & 1150 4-valve twins" page 0.8〕 The compact close-ratio six-speed transmission is derived from the BMW K1200RS.〔 Far from being a touring overdrive, the top gear gives 20 mph per 1,000rpm, so at 80 mph the engine turns at 4,000rpm.
In addition to using the engine as a stressed member, the R1100S has a composite aluminum frame to which the suspension components are attached. The front suspension is BMW's patented Telelever, with long telescopic fork sliders containing neither springs nor damping. In order to minimize "fork dive", braking forces are taken back to the frame ''via'' a pivoting wishbone. A monoshock on this wishbone copes with springing and damping.〔(【引用サイトリンク】title=BMW Telelever and telescopic forks: which is better? )〕〔(【引用サイトリンク】title=BMW Telelever Explained )〕 The rear suspension comprises BMW's "Paralever", a single-sided swinging arm encompassing shaft drive.〔(【引用サイトリンク】title=BMW R1100S Road test )〕 The Paralever mounts directly to the frame instead of to the gearbox as on earlier oilheads. A reviewer reported: “The result is greater frame rigidity and better handling".〔
A detachable tubular subframe supports the rider and passenger. The R1100S has a very substantial half fairing which completely envelops the alloy fuel tank. Both the hugger and front fender are made of carbon-fibre. The two-into-one exhaust feeds twin silencers tucked up high beneath the pillion seat, like those on the Ducati 916.〔 Factory options originally available from BMW included electrically-heated grips, ABS brakes and a belly-pan fairing.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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