31/CARBURETOR 175
21.21Assembling the carburetor
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– Mount and tighten idle air jet .
Guideline
Idle air jet M4.5x0.75 2 Nm (1.5 lbf ft)
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– Mount and tighten choke slide .
Guideline
Choke slide M12 2.5 Nm
(1.84 lbf ft)
– Position throttle position sensor . Mount screw with the spring ring and washer
but do not tighten yet.
Info
When installing the throttle position sensor, ensure that the flat area of the
inner clutch hub engages in the recess of the throttle position sensor.
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– Position the hose connection. Mount and tighten screw .
Guideline
Screw, hose connection M4 2 Nm
(1.5 lbf ft)
Loctite
®
243™
Info
The hose connection must be easy to turn when it is mounted.
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– Screw in the mixture control screw with the spring, washer, and O-ring all the
way.
Guideline
Mixture control screw M6x0.5 1 Nm (0.7 lbf ft)
– Screw in the mixture control screw by the number of turns that were required to
disassemble it, or adjust it to the specified basic setting.
Guideline
Idle mixture adjusting screw
Open 1.5 turns
Info
The mixture control screw may be open a maximum of 2 turns. If more than
two turns are necessary (rich mixture), use a larger idling jet.
– Position buffer plate . Mount and tighten needle jet , cold start jet and
idling jet .
Guideline
Needle jet M7x0.75 3.5 Nm
(2.58 lbf ft)
Cold start jet M5x0.75 2 Nm (1.5 lbf ft)
Idling jet M6x0.75 2 Nm (1.5 lbf ft)
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