The late 70s was not an easy time for poor old BMW Motorrad. With mounting pressure from the European Union regarding emissions, and their all-too-slow awakening to the fact that Japanese motorcycles were eating their lunch, the Germans were staring down the barrel or irrelevancy. Suddenly, water-cooled fours were all the rage; the 70s journo’s penchant for top speed tests always left the boys from Bayerische with das ei on their faces. What they needed was a unique, powerful, water-cooled platform – and quick. In a classic piece of outside-the-square engineering, they began experimenting with a Peugeot car engine which they decided to lay down in a ‘longitudinal four’ configuration not seen since the pre-WWI-era. And the rest is history – a history which Paul Hutchison from Melbourne has successfully reinvented with his über K100RS.