Engine Specifications for the 1990 XR200R
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Layout
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The 1990 Honda XR200R came standard with a four-stroke, single-cylinder engine. This motor was a single overhead-cam (SOHC) design, placing the camshaft inside the cylinder head to improve drive of the valves. The displacement of the XR200R's engine was 195 cubic centimeters. The four-stroke pattern of the piston's drive gave it greater efficiency and a longer lifespan compared to a two-stroke layout. The bore and stroke of this engine was 2.57 inches by 2.27 inches. The compression ratio was 10.0:1.
Parts
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The XR200R used a single Keihin carburetor for fuel and air mixture. Honda chose an air-cooled system versus a wet or water-cooled system, which allows for longer rides in more extreme conditions. A capacitor discharge ignition (CDI) system was in place for ignition duties, providing for a reliable spark at high speeds. With a short charging time and fast voltage rise, this type of ignition was common in motorcycle and powerboat engines. Honda used an NGK DR8ES-L spark plug for this ignition. For the 1990 year, the engine of the XR200R was painted black.
Performance
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Because the XR200R engine was smaller than some of its counterparts, it provided for a light and quick ride without having to rely on big displacement. The advertised power output of this bike was rated at 30 horsepower and 16 foot-pounds of torque. With a six-speed, manual transmission for gear shifting, the top speed this motorcycle was advertised to achieve was approximately 63 miles per hour. The chain-driven gearbox powered the rear wheel, delivering sharp power during acceleration.
Exhaust and Fluids
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A single exhaust pipe coupled with a quiet muffler ran from the Honda XR200R's motor in 1990. Because of the overall design of the engine's four-stroke layout, the fuel efficiency of the XR200R was advertised at a comfortable 35 miles per gallon. The plastic fuel tank of this bike held 1.95 gallons of fuel, which was more than enough for a day-long trail ride. Honda recommends using Mobil 1 synthetic, 20W-50 synthetic oil.
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