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Adjusting The Carburetor; Adjusting The Engine Idling Speed - Yamaha PW50 Owner's Manual

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Periodic maintenance and adjustment

Adjusting the carburetor

The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most
carburetor adjustments should be left
to a Yamaha dealer, who has the nec-
essary professional knowledge and ex-
perience. The adjustment described in
the following section, however, may be
serviced by the owner as part of rou-
tine maintenance.
NOTICE
The carburetor has been set and ex-
tensively tested at the Yamaha fac-
tory.
Changing
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
EAU39931
ECA10551
these
settings
7-12
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
TIP
A diagnostic tachometer is needed to
make this adjustment.
1. Attach the tachometer to the
spark plug lead.
2. Start the engine and warm it up for
several minutes at 1000–2000
r/min while occasionally revving it
to 4000–5000 r/min.
TIP
The engine is warm when it quickly re-
sponds to the throttle.
3. Check the engine idling speed
and, if necessary, adjust it to
specification by turning the throt-
tle stop screw. To increase the en-
gine idling speed, turn the screw in
direction (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
(b)
1
1. Throttle stop screw
EAU21363
(a)
7

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  • nestor alvarez Aug 16, 2017 09:56:
    amigo, como hatia para ver las partes internas del motor de la pw 50cc