Sym MB10A7-A series Service Manual page 37

2. Maintenance Information
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Idle Speed Adjustment
Caution
All the other configurations should be
completed before idle speed adjustment.
The engine must be fully warmed before
the idle speed adjustment.
Use the main stand of the bike, and warm up
the engine. Clip on the RPM sensor (Clip the
RPM sensor clamp on the spark plug cap
wire)
Turn the idle speed adjusting screw to reach
the recommended idle speed.
Recommended idle speed：1600±100rpm
Emission adjustment in idle speed
Warm up the engine for around 10 minutes
and then conduct this adjustment.
1. Connect the tachometer onto engine.
2. Turn the idle speed adjusting screw and let
the engine run at the recommended idle
speed.
3. Insert the exhaust sampling pipe of
exhaust analyzer into the front section of
exhaust pipe. Turn the air fuel ratio
adjusting screw to make the emission
value in idle speed within standard.
4. Slightly accelerate the throttle valve and
release it immediately. Repeat this for 2~3
times.
5. Read the engine RPM and emission value
on the exhaust analyzer. Repeat step 2 to
step 4 procedures until measured value
within standard.
Emission standard： CO：3. 0 % ↓
2-8
To this chapter contents
HC：2000 P.P.M. ↓
Spark plug cap wire
Idle speed adjusting screw
Air fuel ratio adjusting screw