70766 Suzuki RM250–

FUEL SYSTEM 9-9

Jet needle

Lean

Rich

Air/fuel

mixture

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(2) Adjustment of main system With the throttle opened 3/4 to fuli, make main system adjustment monitoring the air/fuel mixture con-dition after completion of slow system settings.

* Make surÄ™ to adjust the main system before adjusting the intermediate system.

Ex. Main jet #172

If air/fuel mixture is rich, replace it with #170 main jet. If air/fuel mixture is lean, replace it with #175 main jet.

NOTĘ:

SHADED: STANDARD

*:    INCLUDED ALTERNATE PARTS \

NONĘ:    OPTIONAL PARTS

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® Adjustment of intermediate system

Monitor the air/fuel mixture condition and adjust the •Intermediate system by changing the needle clip position.

@ FinaÅ‚ adjustment of slow system After a proper standard setting has been obtained by the procedurÄ™ ® through fine tune the carbu-retor according to the actual race conditions.

1) Adjust the air/fuel mixture by turning the air screw with i n 1/2 - 2 tum s out.

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© Adjustment of slow system

1)    Setthe air screw as specified; V> \\.>

2)    See if the selected slow jet,js\correct'6r not by

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judging the air/fuel mixture) If air/fuel mixture is rich. replace it with smaiter^one. If air/fuel mix-ture is lean_T replace it with largerone.

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Ex. Slow jet #50

If air/fuel mixture is rich, replace it with #48 slow jet. If air/fuel mixture is lean, replace it with #52 slow jet.

2) If the mixture can not be adjusted by the air screw within 1/2-2 turns out rangÄ™, readjust the slow system ©.

(D FinaÅ‚ adjustment of intermediate system Fine tune the intermediate system by changing the needle type and clip position.