41. CARBURETOR
A. Description
Air flow through the venturi is controlled by
a throttle slide (vacuum piston). The slide is
raised and lowered by engine vacuum rather
than a cable linked directly to the throttle
grip.
B. Specifications
Main jet
Jet needle
Needle jet
Starter jet
Fuel valve seat
Pilot jet
Fuel level
502-3
z - 2
2 m m
in)
(above gasket surface)
5.
6.
NOTE: 7.
The low speed mixture screw settings are
adjusted at the factory with the use of special-
ized equipment. Do not attempt to change
these settings.
C. Disassembly
1.
2.
3.
4.
Prepare to separate carburetors (separa-
tion not necessary if only float level
adjustment or throttle value inspection is
to be done). Remove starter lever. Loosen
starter lever securing screws and remove
starter lever rod.
Remove upper and lower brackets. Note
position of synchronizing screws for
guidance in reassembly. Separate car-
buretors.
Remove vacuum chamber cover. Remove
the spring, needle fitting clip, needle,
and diaphragm (piston valve).
Note that there is tab on the rubber
diaphragm. There are matching recesses
in the carburetor body for the diaphragm
tab.
8.
To inspect starter jet, remove three (3)
screws holding the starter body to the right
side of the carburetor.
Remove the four screws holding the float
bowl cover. Remove float bowl cover. The
main jet is located under a cover in the
float bowl.
Pull out float pivot pin. Remove the float
assembly. Be careful not to lose the float
valve needle located under the float level
adjustment tongue. Remove the needle
jet.
Reassemble in reverse order. Pay close
attention to the installation of the
vacuum piston diaphragm.
D. Inspection
1.
2.
3.
4.
Examine carburetor body and fuel passage-
s. If contaminated, wash carburetor in
petroleum-based solvent. Do not use
caustic carburetor cleaning solutions.
Blow out all passages and jets with com-
pressed air.
Examine condition of floats. If floats are
leaking or damaged, they should be re-
placed.
Inspect inlet needle valve and seat for
wear or contamination. Replace these
components as a set.
Inspect piston valve and rubber dia-
phragm. If the piston is scratched or the
diaphragm is torn, the assembly must be
replaced.
36
Summary of Contents for XS650 Series
Page 1: ......
Page 4: ...CHAPTER 1 GENERAL INFORMATION l l MACHINE IDENTIFICATION a 1 l 2 SPECIAL TOOLS ...
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Page 79: ...XS650E Supplementary FOR XS650E MODELS AFTER ENGINE SERIAL NO 2FO 006501 ...
Page 84: ... _ _ _I __ l i _ _ I l R ...
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Page 116: ...MAINTENANCE AND LUBRICATION CHART PERIODIC MAINTENANCE EMISSION CONTROL SYSTEM 3 ...
Page 117: ...t c c ...
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Page 141: ...Supplementary ...
Page 149: ...2 Troubleshooting inspection ...
Page 150: ...LOW BEAM DOES NOT LlGHT WHEN HIGH BEAM IS DEFECTIVE ...
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Page 165: ...Supplementary FOR XS650SE MODELS AFTER ENGINE SERIAL NUMBER 2FO 114241 ...
Page 174: ... R W wire to 118 ...
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Page 202: ...Torque Specifications A Nut ...
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