The Stage IV is a V-twin engine, that means it has two pistons transferring reverse one another. This is the usual design for contemporary bikes. However, the 135ci quantity is much from customary.

Adding to the excessive efficiency are 6.8g/sec gasoline injectors, that are greater than quick sufficient to achieve excessive speeds in seconds. It additionally has 4.31″ metal sleeve cylinders. They’re so finely tuned that Harley took out a patent on them. Those fancy cylinders are topped with one other Harley-brand half, the Screamin’ Eagle Extreme CNC-ported cylinder heads.

It’s designed for a “wide open throttle,” which suggests you possibly can crank it to speed up in a flash. It makes passing on highways safer and simpler. The rotational velocity can ship 130 hp at 5,500 RPM.

For perspective, the first Harley-Davidson model had bicycle pedals for including human energy ought to the 24.74ci, 3hp engine wrestle on steep hills. But that was over 100 years in the past, and occasions have modified.