Ever Thought, What actually happens when we switch the knob to reserve?
A regular motorcycle Has main tank and a reserve tank. There is no separation between them but they belong as a whole tank. The knob that is present at the left side down under the bike enables us to switch to either MAIN TANK, OFF and the RESERVE TANK.
In reserve, a smaller valve gets opened so it allows the engine to consume less fuel when compared to the main tank.