We told you about BMW’s plan to spruce up its heritage cruiser ... The most notable change in the R 18 lineup is the updated engine. All five bikes boast a re-tuned 1,802cc flat-twin boxer ...

The enthusiast world loves inline-six engines - engines with six cylinders in a row - and BMW is an example of an automaker with a long history of inline-sixers. As we'll see later, the format has ...