Specifications; Inspection - Yamaha YT175J 1982 Service Manual

Specifications
Type:
Main Jet:
Jet Needle:
Air Screw:
Pilot Jet:
Float Height:
Engine Idling Speed:
Inspection
VM24SS
#165
4K4-3
1 and 1/4
#40
25 ± 1 mm (0.98 ± 0.04 in)
1,600 ± 50 r/min
1.
Examine carburetor body and fuel
passages. If contaminated, wash car-
buretor in petroleum based solvent. Do
not use caustic carburetor cleaning solu-
tions. Blowout all passages and jets
with compressed air.
2. Examine condition of floats. If floats are
damaged, they should be replaced.
3. Inspect inlet float valve and seat for
wear or contamination. Replace these
components as a set.
1. Aoat valve
2. Valve seat
4. Inspect the jet needle for bends or wear.
If the needle is bent or severely worn,
replace it.
4-2
Adjustment
1. Float height
a. Reinstall components, except for the
flnat chamber.
Incline the carburetor until the float arm
tang lightly contacts the float valve (so
th?Jt the end of the float valve does not
hang down of float weight), and
measure the distance from the mating
surface of the float chamber (gasket
removed) and carburetor to the top of
the float using a gauge.
Float height:
25
±
1 mm (0.98
±
0.04 in)
NOTE: _ _ _ _ _ _ _ _ _ _ _ _
The float should be just resting on, but not
depressing the spring loaded inlet needle.
,
3
/
1. Float valve 2. Float arm 3. Float
1. Float level