Reduced gas mileage

[pcv57]

I have a 2006 S2R1000 and noticed my gas mileage has dropped to about 30mpg. It's been recently serviced, air filter has been cleaned, new belts, valves etc.   Any ideas on what could be causing this?

[Gimpy]

I assume you mean other than your right wrist.

That big of a difference, I would suspect the valves being out of spec.  After I did my valves for the first time I saw a 5mpg drop until I re-did them and found where I had messed up.

[pcv57]

I had the valves done by a certified Duc mechanic but you never know.. I'll check them out. As far as the right wrist is concerned, that has remained constant