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Adjusting The Fuel Level - Derbi GPR 125 Racing Workshop Manual

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Table of Contents
5. Adjust:
- Idle speed
See the "MEASURING AND ADJUSTING IDLE SPEED"
section in CHAPTER 3.
6. Adjust:
- Throttle cable play.
See the "ADJUSTING THE THROTTLE CABLE" section in
CHAPTER 3.
A
DJUSTING THE FUEL LEVEL
JUS
G
U
1.Measure:
- Fuel level (a).
Outside that specified => Adjust.
Fuel level:
1.5 – 2.5 mm below the bowl line
Adjustment steps:
- Place the motorcycle on a flat surface.
- Place a jack or a support under the engine to ensure that
the carburettor is positioned vertically.
- Connect the fuel level meter (1) to the drain pipe (2).
- Loosen the drain screw (3).
- Hold the meter vertically and close to the line of the car-
burettor bowl.
- Measure the fuel level (a) with the meter.
- If the level is incorrect, adjust it.
- Remove the carburettor.
- Inspect the valve seat and needle valve.
- If these parts are worn, replace both.
- If they are normal, adjust the float level by bending slight-
ly the edge (4) of the float.
Float height:
15.5 - 16.5 mm
- Fit the carburettor.
- Check the fuel level once again.
94

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