I was pretty surprised myself (not to mention being p@ss*d off) as I was 3 miles form a garage.
While I was running in I got about 180 miles out of 18 litres therefore I assumed @ 10 miles per litre it would do 200 miles per tank. Obviously the consumption went up after running in, hence my estimate of about 165 to 170 per tank.
The trouble was that, even after running out, it only took 18.5 litres and not the 20 I expected.
In future I'll fill up at 150 cos I'm buggered if I'm going to slow down...
Life's too short.
Anyway, there are far more redeeming features of the bike like the ability to scare the crap out of sports bike riders when they get zapped going into a corner by a zombie on a flying fire engine while they strain to get their knee down.
Tee hee