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Table of Contents
I – The condition of the cold start system piston valve. => In
the event of the vulcanised closing seat or the metal body of
the piston being damaged (scratches and/or corrosion that
exceed 25% of its total area).
- Size of the bores based on the numbers etched onto them.
=> If they are not in agreement with that specified, replace
them with suitable ones. Failure to do so may result in the
performance of the engine being affected.
- The position of the tapered dosing needle. It should be
located in the centre slot of the three available.
N.B.
MOVING THE CIRCLIP ON THE NEEDLE UPWARDS RESULTS
IN A LEANER MIXTURE, AND MOVING IT DOWNWARDS RE-
SULTS IN A RICHER MIXTURE. THIS ALLOWS ADJUSTMENTS
TO BE MADE FOR EXTREME CLIMATIC CONDITIONS.
- THE CONDITION OF THE TAPERED DOSING NEEDLE. =>
IF THERE IS DAMAGE VISIBLE ON ITS CIRCUMFERENCE,
CHANGE IT
92

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Table of Contents

   Also See for Derbi GPR 125 Racing

This manual is also suitable for:

Gpr 125 racing

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