HYOSUNG Aquila 250 Service Manual page 102

● Remove the valve seat ①.
● Remove the main jet ②, jet holder ③ and pilot jet ④.
● Remove the throttle cable bracket ⑤.
● Remove the pilot screw ⑥ with count and tighten the
number of turn.
NOTE:
Record the number of turn for the pilot screw when
install to confer.
◉ INSPECTION
Check the following parts for damage and clogging.
∙Pilot jet
∙Main jet
∙Main air jet
∙Pilot air jet
∙Needle jet holder
∙Needle valve
∙Valve seat
If any abnormal condition is found, wash the part clean.
If damage or clogging is found, replace the part with a
new one.
∙Piston valve
∙Starter jet
∙Gaskets and O-rings
∙Pilot outlet and bypass
∙Float
∙Jet needle
③
④
②
⑤
⑥
Check for stopped wear
Needle valve
FUEL SYSTEM 4-6
①
Foreign
substance