Facts about the new Harley motor
Some juicy facts about the 2017 Milwaukee Eight motor, gleaned from an actual parts microfiche…
Our earlier speculation was incorrect; the Milwaukee Eight DOES have 4 valves per cylinder, opened by two pushrod-activated rockers arms (each one has one “finger” per valve) and closed by conventional valve springs. There are two spark plugs per cylinder, over flat-topped pistons. The heads are water cooled. There’s a single chain-driven cam with four lobes (now that seems like a step backwards,but it’s probably cheaper to produce than the 2-cam setup) and a Twin-Cam-like oil pump & camshaft support plate. Even the touring models now use a balance shaft to quell vibrations, though the motor is rubber mounted in the frame.
