1981 XS11 float level adjustment
Thanks to Mike Saar
VP So.MD Chapter - XSOA

Fuel level measurement

NOTE:
Before checking the fuel level, note the following:
Place the motorcycle on a level surface.
Adjust the motorcycle position by placing a suitable stand or a garage jack under the engine so that the carburetor is positioned vertically.

1. Connect the level gauge (special tool) or a vinyl pipe of 6 mm (0.24 in) in inside diameter to the float bowl nozzle left or right side carburetor.
2. Set the gauge as shown and loosen the drain screw.

3. Start the engine and stop it after a few minutes of run.
This procedure is necessary to obtain the correct fuel level.

NOTE:
Make sure the fuel petcock is "ON" or "RES" position.

4. Note the fuel level and bring the gauge to the other end of the carburetor line and repeat step 3 above.
Note the fuel level again and compare it with the previous gauge reading. They should be equal. If not, place a suitable size of wooden piece or the like under the center stand and adjust.

5. Check the fuel level one by one. The level should be in the specified range.

Fuel level:
3 +/- 1 mm (0.12 +/- 0.04 in) below from the carburetor mixing chamber body edge.

NOTE: By Blaine Hoopes 7/11/99 - Clymers shows the above picture measuring from the split between the float bowl and carb body. The '81 XS650 has nearly identical carbs and it's factory service manual shows this measurement made from the split between the bowl and carb. I believe the above picture is in error.

6. If the fuel level is incorrect, remove the carburetor assembly from the motorcycle and check the fuel valve(s) and float assembly(s) for damage.
7. If no damage is found, correct the fuel level by slightly bending the float arm tang. Recheck the fuel level.

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