Just had the valve adjustment done and my fuel mileage has tanked. 30-33mpg taking it easy on the backroads, 24-28mpg blasting down the highway, all unloaded, empty bags and I even lost 30lbs over the winter. I only run top tier premium in the bike, and the gas is fresh. The air filter has approximately 3500 miles on it and I run the tire pressures at 41/41. Bike seems to run fine, nothing jumps out as wrong, except this. Just looking for some insight on what to check that would cause such a drastic change in mpg? I took the plastics off for inspection and I did find that the inlet air pressure sensor rubber mount was not installed in the bracket. I am assuming these sensors are sensitive to any impact, and thus why they are rubber mounted the way they are? One theory, I am speculating on, is that the sensor, not attached, "bounced around" on top of the engine, due to rough roads around here, and damaged the sensor in such a way that the reading is off enough to cause ECU add more fueling? There are no codes or faults generated. The National is coming up quick and I stressing over how to fix this? Any input would be appreciated.