Carburetor Inspection; Needle Valve Inspection; Float Height Adjustment - Suzuki DR350 Service Manual

FUEL AND LUBRICATION SYSTEM 4-6
• Remove th e needle jet
<D
from the bore side .
• Remove the pilot jet
®
and pilot screw
@.
• Remove the starter plunger assembly
® .
CAUTION :
00 not attempt to di sassemble the four screws
®
this pa rt
@
is not serviceable
INSPECTION
Check following items for any damage or c logging .
• Pil o t jet .. Needle valve
• Main jet • Starter jet
.. Main air jet
• Gasket
• Pilot air jet • Throttle shaft sea l
• Needle jet air bleeding hole
• Float
.. Pilot outlet and by-pass holes
• Accelerating nozzle
NEEDLE VALVE
If foreign matter is caugh t between the valve seat and the
needle. the gasoline will continue fl owing and cause it to
overflow .
If
the sea t and needle are worn beyond the per-
missible IiImits, similar trouble will occur. Conversely.
if
the
needle sticks, the gasoline will not flow into the float cham·
ber. Clean the float chamber and float parts with gasolilne .
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.
FLOAT HEIGHT ADJUSTMENT
To check the float height. invert the carburetor body , with
the float arm kept free . measure the height
®
while float
arm is ju st in contact with needle valve with cali pers.
Bend the tongue
Q)
as necessa ry to bring the height
®
to
this valve .
Float height @: 14.2±1 .0 mm 10 .56 + 0 .04 in}
09900· 20101 : Vernier calipers
-r-
A
INCO RRECT
n
'r-
'('-
CORRECT
®