Probably old news to some people, but check out Harley Davidson's new 107 engine called Milwaukee-Eight. Looks like it's only available on 2017 touring bikes.
Harley Davidson Milwaukee-EightHarley Davidson is trapped making big push rod v-twin engine's. Their new Milwaukee-Eight engine probably doesn't perform as well as v-twin engine's manufactured by competitors with an overhead cam design. But who can blame Harley Davidson for continuing to make the best selling and most recognized v-twin engine in the world.