That's about right Redbikejohn. I normally get about 230 miles before reserve an put around 18 litres in!............ and I don't hang about!
So about 5 litres reserve!
I recon steady riding will give about 300 miles.
If you brake hard this will make the fuel gauge go down. Easiest way to reset is to stop, turn off ignition , restart and thern you will see bars aain. Works for me!