Hey Guys,
Just picked up my GS last friday and have been riding the heck out of it, but I've noticed one thing.  I filled up and rode like 250km and then it started sputtering and the engine cut off.  I set it to reserve and it fired back up.  I filled up and only put in 10 litres and it was full.  Am I missing something?  Tank is 20 litres, but only getting 10 litres of riding.  Any suggestions guys?

See the current thread GS dies on the interstate for some ideas.

Were you riding along at a high throttle setting when the engine died?  I wonder what would have happened if you had left the petcock in the ON position for a minute, or returned it to the ON position after you got going again on RES?

I think all the bikes have a slightly different "time for reserve".  I noticed that I go to reserve after about 200 miles and it takes about 3.3 gallons to fill it up.  My reserve seems to be 2 gallons.

Older GS have 17 litre tank (dunno your one's age)

In my 91 GS I only get to about 200km's before reserve, normally 250 before I fill up. Normally the fill is about 12 litres or so, so that leaves 5 litre before bone dry. I could probably go to 300km's or so total on reserve, but have never been that game. I normally get ~20k/litre.