This is a pict of my Raptor (driven by the friend with the lite backpack) and my KTM.
Note the bedroll on the back of the Raptor. I had to backpack my all gear.
The Raptor was surprisingly good on fuel for 660cc, but then again, maybe it was the
slow pace the 4x4s set that made it so good on fuel.
My KTM was originally very hard on fuel, and I take it on long treks, so I upped the fuel capacity
from the original 2.5gals to 5gals (20 litres) with a larger front and axillary rear tank.
The down side of larger tanks is they don't always fit like they should, they often don't look so nice,
and they do increase the top heavy weight of the bike. Now I am talking motorcycle here,
but I do have some fit problems with aftermarket pipes and the larger tank too.
Mine is an IMS, the plastic is thick and tough and has stood up to some pretty big impacts.
The IMS and Clarke tanks seem to be well made.
I have a "natural" plastic tank on my other KTM and I like that you can instantly see the fuel level.
If you think an oversize tank is ugly in black or blue, you should see one in yellowish white with
red fuel sloshing around in it. It is function over fashion for sure.
The real point I wanted to make here (since most of my experience is not with Blasters) is that when
I worked at tuning the carb on my KTM the fuel mileage doubled from 27-30mpg to 55mpg depending
on riding conditions. This negated the need for the larger fuel tank to a large degree.
Most 2 strokes are jetted fat in the mid-range (and on top) making them lazy and thirsty.
Most of the jetting work for fuel mileage was with the pilot and needle, where you ride most at high speed cruise.
It takes a lot of work to get it right because richer is safer and fewer hitches than lean,
but when it is right, the bike works better and only sips fuel.
With the larger tank on that bike and the tuned up carb it can go up to 250 miles or 400 kms on a
single fill up. Even with the stock tank the carb tune up increased the fuel range from about 75 miles to 150 miles.
Well worth doing.