So I'm pretty new to owning and maintaining motorcycles. I've done all my own automotive maintenance so I know my way around a shop. But needless to say I feel like an idiot with this question. On the fuel petcock (which I am completely ignorant of it's operation and purpose), how do you know which direction is on? Yesterday I had the longer piece of the switch towards the "on". After riding about 2 miles the bike stalled out. So i switched to the other side "res". It ran to the gas station and I only put 1.2 gallons in. I left it towards the "res" the rest of yhe way home and it was just fine. So I wasn't out of gas. I guess my question is what is the difference (if any) between the res and on? Is it detrimental to leave it on "res" instead of "on"? Thanks guys. On a side note, I freakin love this bike. My mountain bike hasn't seen the light of day for the past three weeks!