Sym ALA125CC Manual page 124

SYM
Installation
Install main jet, fuel needle jet seat, fuel needle jet,
slow speed jet and fuel amount adjustment screw.
Cautions
Set the adjustment screw in according to
number of turns noted before it was removed.
Install the float valve, float, and float pin.
Checking Fuel Level
Cautions
Check again to ensure float valve, float for
proper installation.
To ensure correct measurement, position
the float meter in such a way so that float
chamber face is vertical to the main jet.
Fuel level: 3.0±1mm
INSTALLATION OF CARBURETOR
Install carburetor in the reverse order of removal.
Following adjustments must be made after
installation.
Throttle valve cable clearance adjustment
Idle speed adjustment
IDLE SPEED ADJUSTMENT
Caution
Fuel amount adjust screw was set at factory,
so no adjustment is needed. Note the
number of turns it takes to screw it all the
way in for ease of installation.
Never screw in forcedly to avoid damaging
the screw seat.
The main stand must be used to support the
motorcycle to perform the adjustments.
Use a tachometer when adjusting engine RPM.
Screw in adjustment screw gently, then back up to
standard turns.
Standard turns: 2 1/8±3/4 turns
Warm up engine, adjust throttle valve stopper
screw to standard RPM.
Idle speed rpm: 1700±100 rpm
Connect the sampling hose of exhaust analyzer to
exhaust front end. Press test key on the analyzer.
Adjust the air volume adjustment screw and read
CO reading on the analyzer.
CO standard value: 1.0~1.5 %
Accelerate in gradual increments, make sure both
rpm and CO value are in standard values after
engine running in stable. If rpm and CO value
fluctuated, repeat the procedures described above
for adjusting to standard value.
4. FUEL SYSTEM
float meter
Throttle valve cable
adjustment nut
fuel amount
adjustment screw
throttle valve
stopper screw
air volume
adjustment screw
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