I have an electronic tach off the Magna. I believe it's accurate. It did kind of stammer in fourth gear. Maybe I just didn't get the throttle open right away. I was flying blind and worrying about the iPad flopping off. I really had a lot of things on my mind more than just going through the gears. I just shifted by ear. I think it probably pulls best shifting at 7500-8000. I don't ride it like that much, but around the city, it's fun. I think I'm a tad rich still, but I think the slides are working properly. I might go down to a 135 main some day.