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Seems silly but my '93 katana's petcock switch has no position markings on it. I have no idea where reserve is. Pointed towards the rear of the bike I assume is off, which leaves down and forward. Which position is what?
So far I haven't run it down to get sputter that I know is no fuel. What I thought was reserve point might have been an intermittent low idle/stalling problem that I've since fixed (fingers crossed). If some one would let me know what positions are what it might save me some grief. Thanks.

Does your fuel stick look like this one? This is from an RF600, but is it possible that they are the same??

I got it from an online manual at:
http://www.themotorhead.com/downloads/

im pretty sure all katana models/years have the same petcock setup, i can be wrong. But if they do then down is On, Back is Prime, Forward is Reserve. there is no Off, its a vacuum system so you just leave it to On and your fine. dont put it on prime or youll have problems.