Petcock positions?

Man, am I having a Beavis & butthead moment here! Huhhuh. You said...

Okay, seriously though, I need an answer despite my own juvenile snickering. I'm not sure which setting is which on the '76 400's petcock. Since there's only 1 tube coming out of it, I assume I have On, Off, & Res, but which is which?

Thanks,
-Kit

In general, lever straight across is off, lever at the top is reserve, and lever at the bottom is on.
At least that's the way it is on the 750 twins.

Thanks, Steve!