Sym FIDDLE 125 User Manual

SYM 4. FUEL SYSTEM
4-9
Installation
Install main jet, fuel needle jet seat, fuel needle jet,
slow speed jet and fuel amount adjustment screw.
Cautions
Install the float valve, float, and float pin.
Checking Fuel Level
Cautions
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
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.
Set the adjustment screw in according to
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 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 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.
float mete
r
fuel amount
adjustment screw
Throttle valve cable
adjustment nut
throttle valve
stopper screw
air volume
adjustment screw

Sym FIDDLE 125 Specifications

General

Displacement	124.6 cc
Cooling System	Air Cooled
Transmission	CVT
Front Suspension	Telescopic Fork
Front Brake	Disc
Rear Brake	Drum
Front Tire	110/70-12
Rear Tire	120/70-12
Seat Height	780 mm
Engine Type	4-Stroke
Fuel Tank Capacity	6.5 L