Adjusting The Engine Idling Speed; Adjusting The Throttle Cable; Adjusting The Carburetors - Yamaha RS90NL Owner's Manual

ESU03701

Adjusting the engine idling speed

CAUTION :
@
G Be sure to have a Yamaha dealer make this
adjustment.
G
Make sure that the throttle lever moves smoothly.
G
Make sure that the carburetor is synchronized
first.
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1. Start the engine and warm it up.
NOTE:
@
Refer to the "Starting the engine" section.
@
2. Turn the throttle stop screw 1 in or out to adjust the
engine idle speed.
Standard engine idle speed: 1,400 ± 100 r/min
ESU01472

Adjusting the throttle cable

CAUTION :
@
Be sure to adjust the engine idle speed first.
@
1. Loosen the locknut.
2. Turn the adjuster in or out until the proper throttle
lever free play is achieved.
Throttle lever free play a:
2.0–3.0 mm (0.08–0.12 in)
1 Locknut
2 Adjuster
3. Tighten the locknut.
ESU04870

Adjusting the carburetors

The carburetors are an important part of the engine and
its emission control system, which require very sophisti-
cated adjustment. Therefore, carburetor adjustments
should be left to a Yamaha dealer, who has the neces-
sary professional knowledge and experience.
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