Inspection - HYOSUNG WOW90 Service Manual

● Remove the throttle stop screw ① and pilot air
screw ② .
CAUTION
When removing the pilot air screw, record the
revolutions until tighten completly.
● Remove the pilot jet ③, main jet ④ and needle jet
⑤.

INSPECTION

Check following items for any damage or clogging.
● Pilot jet
● Main jet
● Pilot air screw
● Needle jet air bleeding hole
● Float
● Gasket
● Pilot outlet and bypass holes
◉ ◉ NEEDLE VALVE INSPECTION
If foreign matter is caught between the valve seat and
the needle, the gasoline will continue flowing and cause
it to overflow. If the seat and needle are worn beyond the
permissible limits, similar trouble will occur. Conversely,
if the needle sticks, the gasoline will not float chamber.
Clean the float chamber and float parts with gasoline. If
the needle is worn as shown in the illustration, replace it
together with a valve seat. Clean the fuel passage of the
mixing chamber with compressed air.
①
②
③
⑤
④
FUEL SYSTEM 4-4
,
Inspect the valve surface for worn
Foreign matter