BMW K1
The BMW K1 is a fully enclosed motorcycle from BMW. The super sports car was unveiled September 20, 1988 at the IFMA in Cologne and built from 1988 to 1993 in a quantity of 6921 units in the BMW plant in Berlin Spandau, 2050 of them were registered in Germany. Launch in May 1989.
The bike is constructively derived from the BMW K 100 RS and all models of the K- series powered like a series motor.
Specifications
The K1 is one of the first production motorcycle with full fairing, with a drag coefficient ( Cd value ) of only 0.34 on a horizontally driver. The seven-part panel made of fiberglass reinforced plastic is therefore also the reason for the speed of 240 km / h Without cover a top speed of about 210 km / h would be possible. The K1 was the first motorcycle from BMW with an engine with 16 valves. BMW promoted the K1 with the words: " No high-powered racing machine with street legal, but a manageable high-tech masterpiece for drivers with sporting ambitions ".
Drive
The liquid-cooled four-cylinder engine produced from 987 cc capacity is rated at 74 kW (100 hp) and a maximum torque of 100 Nm at a speed of 6750 min -1. The four -cylinder along the horizontally installed in-line engine has a bore of 67 mm diameter. The spool stroke of the four-stroke engine is 70 mm with a compression ratio of 11.0: 1 The cylinder head has two chain-driven, overhead camshafts, which control bucket tappets per cylinder, two intake and two exhaust valves. In contrast to the K 100 RS had the K1 is no mass air flow sensor located in the air flow, the reduced performance.
The bike accelerates in 3.9 seconds from 0 to 100 km / h From a speed of 9170 min-1 the rev limiter begins.
Landing gear
The chassis is based on the K 100 In order to improve the stability in fast corners, the pipe diameter of the space frame were enlarged and the suspension geometry slightly changed so that the wheelbase has increased from 1516 to 1565 mm. Because of the fairing and the long wheelbase, the turning circle has a diameter of 6.7 m.
The front wheel is out of a telescopic fork from Marzocchi with hydraulic shock absorbers and 135 mm of travel. The rear wheel is mounted on a single-sided swingarm with torque support ( Paralever ) to reduce load change reactions and brake plungers. The weight-optimized three-spoke alloy wheels have tubeless low profile tires. The permissible total mass is 480 kg.
Electrical System
The starter battery has a capacity of 25 Ah and supplies the starter motor. The alternator produces an electrical output of 460 watts. The digital motor control Motronic controls the ignition timing and the fuel injection and the first time allowed the use of a closed-loop three -way catalytic converter, which was available optionally. Front the K1 had a rectangular halogen headlamps with headlamp leveling, rear a two -chamber light.
Fuel supply
According to ISO 7118 the average fuel consumption is 5 liters per 100 km at a speed of 120 km / h The fuel tank holds 22 liters. The manufacturer recommends the use of unleaded gasoline with a knock resistance of at least 95 octane. The 4- in-1 exhaust system opens on the left side of the vehicle at the height of the rear scar into a silencer.
Accessories
On request, the catalytic converter and heated grips and an anti -lock braking system was available. Tour bags were not offered by BMW, the BMW engineer Karlheinz Abe justified this decision as follows: " Large integral case would not only disturb the appearance, but also the aerodynamic concept that was applied the flow from the front fender to the rear end, adversely affected. " Instead, the bike had two each 6 -liter storage compartments at the stern.
Reviews
" The chassis coped with [ ... ] no serious sporting use. And then there 's the matter of the cornering clearance. Motorcyclist's greatest asset - and BMW had built too little of it. Especially when carrying a passenger. Headless abrasions on main stand and lower fairing and all bolts in this area: It's all over even at a moderate pace. The BMW test driver had been obviously on the wrong routes go. "
"While some Considered the bodywork cutting edge, more thought it was just plain weird. And while performance was good, the K1 's solid -mounted engine which faulted for mid-range Buzziness. Worse yet, at speeds below 50 mph many testers found the heat pouring from under the K1 's bodywork unbearable. "
"While some regarded the body as innovative, the majority held it as simply strange. And while the performance was good, the permanently mounted engine of the K1 suffered from vibrations in the medium speed range. Worse, at speeds below 80 km / h, many testers found the heat under the disguise unbearable. "
" The K1 ducks, it is a bull. From a distance, the device looks like something from another planet, " futuristic " call it their fathers. With the good old Boxer motorcycles, the K1 has only the white and blue emblem in common. You bubbles not from their exhaust comes a darker sound. "