Yamaha YFM25RY Owner's Manual page 30

The fuel cock lever positions are explained as fol-
lows and shown in the illustrations.
1
OFF
2
3
4
5
OFF
6
1
7
8
1. Arrow mark positioned over "OFF"
9
With the fuel cock lever in this position, fuel will not
flow. Always turn the fuel cock lever to this position
10
when the engine is not running.
11
ON
1
ON
1. Arrow mark positioned over "ON"
With the fuel cock lever in this position, fuel flows
to the carburetor. Turn the fuel cock lever to this
position when starting the engine and riding.
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