General Bike Ravings

Does anyone have a good idea of how many k's I should be getting out of a tank of 95octane?

I am just running a DR-Z 250 on the road - tank size 10.5litre.

I've been filling up at around 200km just to be safe but was wondering how much more I should have left in it.

just a couple of questions for you seasoned bikers out there (from a relative newbie):

1/ anyone know what the score is with a mature(ish) adult having to be restricted to 70km/h for the first 6 months of riding a bike, and limited to riding between 5am and 10pm for the first year (excepting for those that fast-track), compared to a 15yr old kid getting the keys to a god-knows how powerful car and being able to do what they want?

2/ in the UK, you cannot pay your ...