Installation Of Carburetor; Idle Speed Adjustment - Sym EuroMX 125 Service Manual

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: 17.5 mm

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
Use a tachometer when adjusting engine RPM.
Screw in adjustment screw gently, then back up
to standard turns.
Standard turns: 1 3/4±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.
This chapter Contents
4. FUEL INJECTION SYSTEM
Float meter
Throttle valve cable
adjustment nut
Fuel amount
adjustment screw
Throttle valve
stopper screw
Air volume
adjustment screw
4-9