2005 Speedmaster tank range.

It varies on the state of tune of your bike, the modifications already done (exhaust, filter, jetting) & of course your style of riding.

You will never full empty the fuel tank as it's raised in the centre where the fuel tank sits on the top bar of the frame. The fuel tap is on the LHS so fuel gets stuck in the gulley on the RHS unless you shake the bike about whilst riding to splash some over, but you'll never fully empty it.

The best rule is to fill up every 100 miles to start with. After a while you will be able to work out your fuel consumption & might be able to stretch it to 120 or 130 but for the time being, play it safe & aim to refill every 100 miles.

I would rather top up with 3/4 of a tank than run out in the middle of nowhere.

 

I went on a trip to north Yorkshire ,cruising at the speed limit of course mostly motorway go to 163 miles and hit the reserve that was 2 up fully loaded with tent and associated gear :upyeah:

 

Out of my 2012 speedy I got over 200 miles even on a long journey.