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8-21
8
TIP
A diagnostic tachometer is needed to make this
adjustment.
1. Start the engine and warm it up.
TIP
The engine is warm when it quickly responds to
the throttle.
2. Attach the tachometer to the spark plug lead.
3. Check the engine idling speed and, if neces-
sary, adjust it to specification by turning the
throttle stop screw at the carburetor. To in-
crease the engine idling speed, turn the throt-
tle stop screw in direction (a), and to decrease
it, turn the screw in direction (b).
TIP
If the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.
1. Throttle stop screw
Engine idling speed:
1600–1800 r/min
(a)
(b)
1
UBW463E0.book Page 21 Monday, January 28, 2019 10:22 AM
Содержание YFZ50 2019
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