Sym MB10A7-A series Service Manual page 60

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I dle Speed Adjustment
7 B
Caution
Air-screw was set at factory, so no
adjustment is needed. For easy
installation, count the number of circles it
takes to screw the air-screw to the bottom.
The idle adjustment process must be done
while the bike is on its main stand.
Use a tachometer while adjusting engine
RPM.
Screw in air adjusting screw gently, then back
up to standard circles.
Standard setting：1
Warm up the engine fully; adjust the throttle
stopper screw of throttle valve to achieve the
standard idle RPM.
Standard idle speed：1600rpm±100
Connect the hose of exhaust analyzer to
exhaust front end. Press test key on the
analyzer.
Adjust the air adjustment screw and read CO
reading on the analyzer.
Standard value of CO emission：1.0~1.5 %
Gradually increase the throttle, make sure rpm
and CO value are within the standard range
after engine running stable. If rpm and CO
value fluctuated, repeat the procedures above
for achieving the standard value.
To this chapter contents
circles
3/4
3. Fuel System
Air adjusting screw Idle adjusting screw
3-11