
I've not yet been able to tell any real difference. In fact, I have not yet had someone with a "stock" bike or car ride along side and help me validate how close (or far off) my speedo is (which would effect the odometer as well).
So far, I'm not thinkin' there is that much of an error in the speedo...........but will verify that pretty soon.
Meantime, I would speculate that the milage (given the type of riding you're doing, just might be better......not worse). Less down shifting and better usage (wider range) of both 5th and 6th gear. For example, if your's gets worse, and you used to get 45 MPG, the ratio change is 6.6% so worst case, would be your milage could drop by a little less than 3 MPG. BFD
