BMW K 100 RT

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The BMW K100 is a family of four-cylinder 987 cc motorcycles that were manufactured by BMW from 1983 to 1992. As the 1970s came to an end, BMW faced three problems from developing its flat-twin boxer engine further: Emissions regulations being developed in the United States and the European Union meant that more control was needed over the amount of fuel entering the combustion chamber. From an engineering standpoint this was easier to achieve with more cylinders at an overall smaller displacement. The market-led development of bikes was leading to the Japanese factories developing smoother and quicker machines based around a four-cylinder format. Bike comparison in the media at the time was based around top speed, and a four-cylinder when fully developed created more power.



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