Pilot Screw Adjustment - DAELIM HISTORY 125 Service Manual

FUEL SYSTEM

PILOT SCREW ADJUSTMENT

● Remove the luggage box. (⇨4-4)
● Remove the pilot jet rubber.
● Remove the plug maintenance cover. (⇨4-5)
① Turn the pilot screw clockwise until it seats lightly, then
back it out to the specification given (1½).
② Warm up the engine to operating temperature (60℃).
③ Adjust the idle speed with the throttle stop screw.
IDLE SPEED : 1,800 ± 100 rpm
NOTE
•The pilot screw is factory pre-set. Adjustment is not
necessary unless the caburetor is overhauled or a new
pilot screw is installed.
•Before adjusting the pilot screw, check the following
items.
-Fuel system, electrical system for troubling.
-Spark plug for cleaning and gap adjusting.
-Valve clearance for adjusting.
CAUTION
•Tightening the pilot screw against its seat will
damage the seat.
④ Rev the engine up slightly from the idle speed and
make sure that engine speed rises and returns smoothly.
⑤ When turning the throttle stop screw in gradually until
the engine speed drops 1,000rpm, make sure that the
engine does not run.
Adjust by turning the pilot screw with a ⅛ turn and
repeat steps ④ and ⑤
CAUTION
•If the engine cannot be adjusted by turning the pilot
screw within a ¼ turn, check for other engine
problems.
⑥ Readjust the idle speed with the throttle stop screw.
● Install the plug maintenance cover. (⇨4-5)
● Install the pilot jet rubber.
● Install the luggage box. (⇨4-4)
5-10
THROTTLE
STOP SCREW
THROTTLE
STOP SCREW
PILOT SCREW
ADJUSTMENT
PILOT SCREW
ADJUSTMENT