Assuming your speedo read accurately before the change, changing to a 15T will make the speedo reading be about 7% lower than actual speed.So I am a new rider, as far as a street bike goes. Been riding dirt bikes all my life on and off the street along with some dual sports (DRZ400). I just recently purchased the 2015 yamaha r3 and i friken love it. I can't stop riding. Only owned it for a week now and have put 320 miles on it with only 3 actual days of riding. I can't get enough of that bike. Now let me get to the point (sorry). I recently went on a ride with a friend up to evergreen colorado and on the highway i noticed the bike was doing 8500 RPM's at 75. That seems like a little more than i want because this bike is going to see a decent amount of highway riding between nebraska and colorado visiting family. So i decided to change the front sprocket up to a 15T. So far so good. Only concern is that my speedo is off. But here is where i am confused... 99% of the time gearing or tire size is changed the speedo is off... I had my girlfriend go ahead of me and set her car on cruise control at several speeds (30, 50, 55 MPH) and i never noticed a speedo change and i was right there with her... is it possible that the speedo is unaltered? if so how?
A Speedo Healer would fix that, part # SH-V4 + SH-U01