Adjustment Of Pilot Screw - Sym Joyride 125 Service Manual

4. FUEL SYSTEM

Adjustment of pilot screw

Caution
․Pilot 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.
․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:
LA12W : 2 ± 1/4 turns
LA15W : 2 ± 1/2 turns
LA18W : 1 ± 1/2 turns
Caution
Do not screw in forceful to avoid damaging
screw seat face.
Warm up engine, adjust the stopper screw of
throttle valve to standard RPM.
Idle speed rpm: 1600 ± 100 rpm
Connect the hose of exhaust analyzer to exhaust
front end. Press test key on the analyzer.
Adjust the pilot screw and read CO reading on the
analyzer
CO standard value: 1.0~1.5 %
Accelerate in gradual increments, make sure rpm
and CO value are in standard value after engine
running in stable. If rpm and CO value fluctuated,
repeat the procedures described above for
adjusting to standard value.
4-10
To this chapter contents
Throttle cable adjust nut 帽
Idle adjustment screw
Pilot screw