I have seen a few mph difference between the digital and analog speedo with the digital being a few mph higher. I noticed that at about 63-64 on the digital,the analog showed 60. Any way to reduce them and/or any way to know which is actually the correct speed w/o matching against a car or a mileage marker setup (not yet riding major highways). Anyone else have this issue? I have a 2014 rt-s se6