Four-stroke, horizontal in line four cylinder, liquid cooled, DOHC, 4 valve per cylinder.
Die cast Aluminum single sided swinging arm with Paralever, central strut, spring preload adjustable to continuously variable levels by mean of hydraulic hand wheel.

BMW C1 was intended to combine the advantages of two-wheeled motorized transportation with the strengths of the automobile.

Liquid cooled, four stroke, single cylinder, DOHC, 4 valves per cylinder.
Steel swingarm with progressive shock linkage.

Four stroke, two cylinder horizontally opposed Boxer air/oil-cooled, 4 valves per cylinder.
Paralever swingarm gas filled shock, preload adjustable.