<The difference between sidestand and centerstand fill ups is only a few ounces. It shouldn't be enough to throw off your total tank milage by any signifigant amount>
You're right. I filled it up on the sidestand. Then I sat on the bike and was only able to get another 2 tenths in. Took a nice long ride cruising the interstate at about 85mph and the light came on 163 miles. Checked the brakes, again, and the rear one might be dragging a little.
The only other thing I can think of is last summer I had the valve clearances checked at the dealer. Is the service manual pretty straight forward and without any mistakes in it on valve inspection?
Thanks,
Mark