NACIONAL MOTOR Derbi Euro 3, Руководство по ремонту

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- Check the position of the tapered dosing needle.
- Moving the circlip on the needle upwards results in a
leaner mixture, and moving it downwards results in a ri-
cher mixture. This allows adjustments to be made for ex-
treme climatic conditions.
- Renew the tapered dosing needle if damage is visible on
its circumference.
- Check for the absence of scratches on the minimum cir-
cuit air regulator screw cone. These would affect its per-
formance.
- Check for the absence of scratches on the sliding valve.
In the event of these exceeding 25% of its total area, re-
new it.
- Be sure to install one with the same characteristics (see
markings on its base).