georgekathe wrote on 12/31/69 at 16:00:05:understand what you are saying Greg but in all times bike has gone down on me I've never had gas come out of the tank. as far as riding along with it stuck between your legs, yeah, it is a bit crazy, but is a bit like the old time fighter boys flying with gas tanks in their fuselage under their arses! me, I'll stick with having a reserve on my one tank & making sure I never run out (which I never have - come close but I've actually run out on a car when I first got one because I forgot there was no reserve & the fuel guage was a little bit misleading.)
Yes but, in truth, the gas cap on your tank is vented, and if you lay it down on the right side with enough gas, it will leak out the cap.
On the other hand, a spare container is probably sealed tight and won't leak unless it becomes ruptured. The other differences being that it isn't as close to hot parts or it isn't rigidly mounted to the bike in a saddle bag.
What was my point? I don't think there is anymore fire danger one way or the other. Myself, I try to fill up every 100 miles.