The overdrive pulley does NOT change the speedometer at all. The speed sensor reads the teeth on the pulley as they pass and it doesn't care how many there are. The tooth spacing is the same on the stock and overdrive pulley. I have one on my bike and it is a great addition. Also, I couldn't find another Vic that I liked more than my 04 KP when I did the demo rides. The Vision was pretty nice but that's a lot of money and I don't ride long distances very often. The 2012 KP had some nice features but it wasn't even close to being as comfortable as my bike. In any case, I put a bunch of money in my bike and couldn't be happier with it.
2014 Vision Nuclear Sunset
XM Radio Module
Sequential Turn Signals F/R
1/4 Turn Throttle Ring
HID Headlights & Cyclops
Vic Shop Tweaks: 124 HP / 121 Torque
04 Purple Thunder Kingpin (Sold)