Inspection And Adjustment - Suzuki DR-Z70 Service Manual

INSPECTION AND ADJUSTMENT

CARBURETOR PARTS
Check the following items for any damage or clogging.
If they are clogged, clean the fuel passage.
* Pilot jet
* Main jet
* Starter plunger
* Float
* Throttle valve
* Needle valve seat
* Needle jet bleeding hole
NEEDLE VALVE INSPECTION
If foreign matter is caught between the valve seat and the nee-
dle valve, the gasoline will continue flowing and overflow. If the
needle valve is worn beyond the permissible limit, similar trouble
will occur. Conversely, if the needle valve sticks, the gasoline
will not flow into the float chamber. Clean the float chamber and
float parts with gasoline.
If the needle valve is worn, as shown in the illustration, replace
the needle valve assembly with a new one. Clean the fuel pas-
sage of the mixing chamber with compressed air.
FLOAT HEIGHT ADJUSTMENT
To check the float height, turn the carburetor upside down. Mea-
sure the float height A while the float arm is just contacting the
needle valve with vernier calipers.
NOTE:
When measuring the float height, remove the gasket.
Float height A: 23.4 ± 1.0 mm (0.92 ± 0.04 in)
09900-20102: Vernier calipers
• If the float height A is out of specification, bend the float arm
1 to bring the float height A to the standard range.
• After adjusting, check the float height A .
* Gasket and O-rings
* Pilot passageway
* Starter passageway
* Needle jet
* Needle jet holder
* Throttle stop screw
* Needle valve
FUEL SYSTEM 4-10