Engine; Adjustment Of Engine Idling - Yamaha YB50 Service Manual

ADJUSTMENT OF ENGINE IDLING

3-6

ENGINE

ADJUSTMENT OF ENGINE IDLING
1. Tighten:
• Pilot air screw
Turn the pilot air screw inwards until it
seats itself lightly.
2. Loosen:
• Pilot air screw.
Unscrew it from its lightly seated posi-
tion.
OUTWARDS TURNS OF THE PILOT AIR SCREW:
DELLORTO
EU0 EU1
1 1 1 1
1 / ± 2 / ± /
2 4 8 8
3. Start the engine and let it warm up.
s WARNING
s
Before starting the engine, ensure that the
central safety stand is being used.
4. Join:
• Inductive tachometer
On the spark plug cable
Inductive tachometer
90890-03113
5. Check:
• Engine idling.
Outside specified value
Engine idling
1.800 rpm
6. Adjust:
• Engine idling
Adjustment steps:
• Turn the accelerator stop screw
or inwards until the specified idling is obtai-
ned.
Turn inwards
Turn outwards
INSP
ADJ
GURTNER
EU0 EU1 MOFA
1 7
1 / 1 / 1
8 8
Adjust.
outward
I
ncreases idling.
Decreases idling.
7
/
8