Fuel switch is on left side under tank. Down or 6 O'clock is on, 9 O'clock is off, all the way up or 12 O'clock is reserve. Just like any other fuel switch I've seen. And btw a few of us lost our fuel switches. So it's a good idea to remove and add some loctite.
Also this shouldn't be posted in the how to section, belongs in the "Motor, Transmission, Electrical, Intake & Exhaust" You don't want to PO the admin's. So try and post in the appropriate places.