Engine; Engine Idle Speed Adjustment - Yamaha YQ50 Service Manual

ENGINE IDLE SPEED ADJUSTMENT

ENGINE

ENGINE IDLE SPEED ADJUSTMENT
1. Tighten :
• Pilot air screw
Turn the pilot air screw in until lightly seated.
2. Loosen :
• Pilot air screw
Back out from the lightly seated position.
Pilot air screw position :
DELL'ORTO
1-3/8 turns out
1-3/4 turns out
1-5/8 turns out
±
2 1/8 turns out (CHE)
3. Start the engine and let it warm up for several
minutes.
WARNING
For safety reasons, place the scooter on the
center stand before starting the engine.
4. Attach :
• Inductive tachometer
(to the spark plug lead)
Inductive tachometer:
Ref: 90890-03113
5. Check :
• Engine idle speed
Out of specification ➔ Adjust.
Engine idle speed :
1800
3-11
INSP
ADJ
±
1/8 (F)(B)(P)(I)(E)
±
1/8 (D)
±
1/8 (NL)
±
200 r/min