Introduction; Throttle Valve Opening Influences; Idle Jet And Mixture Screw - GAS GAS ENDURO 4T EC 2014 Owner's Manual

Owner´s manual

Introduction

Carburetor setting
D
C
B
A
2
This chapter is for users with high mechanical knowledge and experience.
Otherwise these adjustments, must be carrie by your GAS GAS official service..

THROTTLE VALVE OPENING INFLUENCES

The elements of the carburetor that alters the composition of the mixture ba-
sed on the opening of the throttle valve (load) depends on the openness of it:
•
•
•
•

IDLE JET AND MIXTURE SCREW

Controls the mixture from the closed position to ⅛ of charge, but has little effect
on total openness. To adjust the mixture, the mixture screw can be rotated to
change the air flow, or change the idle jet so it lets pass more or less fuel. Start by
turning the air screw. Inward screwing enriches the mixture. The mixture screw
must rotate from a position of fully closed. Make changes by half-turn increments.
If turning the screw 1 to 2.5 turns do not get the desired result, change a step in
the idle jet (1) and tune the mixture screw (2).
1
Zone A: 0 to ⅛ load (throttle opening). Its regulation depends on the idle
screw, the mixture screw and the idle jet (low or minimal).
Zone B: from ⅛ to ¼ load. Influenced primarily by the height of the slide
bezel.
Zone C: ¼ to ¾ load. Responsible is the jet needle..
Zone D: ¾ full load. Responsible is the main jet.
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