Derbi GPR 125 Racing, Workshop Manual

Page: 163 / 247

5 - FUEL SUPPLY SYSTEM
163
- Check for leaks at the screw by pouring small amounts of fuel
into the chamber.
- Fit a new gasket on the bowl.
ALWAYS FIT A NEW GASKET TO
ENSURE THERE ARE NO LEAKS.
- Fit the bowl onto the carburettor body and tighten the 4
screws.
TAKE SPECIAL CARE TO ENSU-
RE THAT THE GASKET IS CO-
RRECTLY FITTED IN THE FLOAT
CHAMBER.
- Check that the control roller is free and turns in its own
housing.
AVOID ANY DISTORTION OF
THE THROTTLE PUMP CON-
TROL ROCKER ARM.
- Wash and carefully blow through the mixture screw (pilot jet screw).
- Check that the screw is not damaged and/or corroded.
- Fitting the spring onto the screw.
- Fit the washer onto the screw.
- Fit the O-ring onto the screw.
- Thread the mixture screw into the carburettor body.
ADJUSTING THE SCREW: UNS-
CREW 2.25 TURNS FROM THE
FULLY SCREWED IN POSITION.
THE FINAL POSITION OF THE
SCREW WILL DETERMINE THE CAR-
BON MONOXIDE (CO) VALUE OF
THE EXHAUST GASES.
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