I installed a 42 tooth rear sprocket recently. The temperature got up to 55 yesterday so I took the girl out for a short sixty mile ride. I love the results! All my other bikes have fairly tall first gears so I guess I'm used to slipping the clutch a bit off the mark. On the interstate I'm guessing it dropped the revs by 600 rpm. 70 mph indicated shows right at 5000 rpm. Maybe it's not for everyone but I like it.