Over the weekend, I rented a 2013 Trike (103 engine) and noticed the RPM at 70 MPH was 3,000. Didn't get good gas mileage. Only 32 MPG. Then I took a 2007 Dyna (DLXR with a 103 engine) out for a test spin for my neighbor (70+ years young). He never had a Harley and wondered if it vibrated much. It also ran 3,000 RPM at 70 MPH. My 2007 Ultra w/96 engine turns 2,500 RPM at 70 MPH. Big difference! All three bikes have the 6-speed tranny. I'd think both 2007 bikes would have the same gearing. Question..... If I get the 96 upgraded to 103 by Harley, would my RPM at 70 MPH change? I don't need an extra 500 RPM change. Tough on the engine.