You can ride for 4+ hours on 2.1 gallons of gas!!! That's amazing!
It's more like 2.5 with the Gatorade bottles, but we also do a lot of stopping and taking in the scenery and such. The 120 was a beast on fuel economy, though. The little wonder-bike has had to go back to camp and rescue other riders with an emergency Gatorade bottle of gas more than once. One time, my dad's 100 Yamaha ran out of gas way the HELL away from camp, so we transferred some gas from the Kawi to the Yammie with a beer can. Then he ran out again, so we did it again. When he ran out a third time, we gave up transferring and did the Gatorade bottle trick. I don't know what the thing is burning to make power, but it's not gas, apparently.
Off-topic, I know, but it's a fun story.