This is my first post, so I first want to say HI to everyone here! Now onto my question for you guys. I just bought my bike a few weeks ago, and I just love it. It it a 1997 Honda CBR600F3. Full Micron exhaust with matching stage III jet kit, tank bra, seat change, tinted windshield, etc. Unfortunetly, the guy who did this work was the first owner.....i am the third owner. So i don't exactly know everything that was done. Well, yesterday i was riding next to my girlfriend (she was in her car), and later she said, "why were you only doing 50mph?" well, i knkow my speedo said about 60mph when i was on that road. so i am wondering if the guy changed the gearing???? Is that an indication of that? What else could it be, and can the speedometer be calibrated? Thanks for your help guys.