Staintune

[SportsterDoc]

Lower gearing will increase acceleration, but will also lower the first gear and successive shift points.
Keeping it under about 8,000 RPM, shift points are about
First: 60 MPH
Second: 80 MPH
Third: 100 MPH

Pulling out onto a highway near one of my hiking areas, with vehicles typically at 80 MPH, I can easily reach merging speed in second gear, in ~/< 6 seconds.

Considering the peak RPM for HP, I see little benefit to raising the rev limit.

See this link for 2013 model and note the HP/torque graph.

https://www.cycleworld.com/2013/07/02/20...ecs#page-5

Excerpt:

"What you get instead of a lofty peak is a beautiful, wide plateau of usable power: 56 foot-pounds of torque is immediately available below 2000 rpm, and over 60 ft.-lb. from 3000 rpm to beyond the 82-hp peak at 7200 rpm. Once you’re in top gear and rolling, shifting is mostly optional. A little vibration in the grips and seat maxes out at about 5000 rpm and 90 mph, which is faster than you’ll want to go on this one until you find a windscreen or some lower bars; a limiter cuts in at 110 mph, anyway.

For 2014:
86 HP @ 7500 RPM
65.6 ft lbs @ 5700 RPM