Monster S2R 1000 mpg issues

After many years of waiting to have the bike that got me into biking, I finally have it!




Love it.

I had the bike serviced last month and managed to sort out a few of the things going wrong with it but some still persist.

The main issue is the mpgs Im getting from it. With reasonable riding I get 60mi until the reserve light turns on and 70mi on a dry tank. that means roughly 20mpgs..

Not sure what's happening. The air filter has been cleaned, the ecu was flashed and tuned on a dyno when the arrow system was fitted (by the former owner), and I filled the tank with 14l of petrol when I ran out of petrol (twice....) so there's no pb with the fuel sender.

Apart from that, the bike runs great. Huge improvement over the FZ6 I had before this one :P

Thanks for any help!
O