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4-1 CARBURETOR
A. Description
The XS750D is equipped with three "constant velocity" (C V) carburetors mounted on rubber intake manifolds.
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 t o the throttle grip. This type of carburetor Compensates auto-
matically for atmospheric pressure changes such as those encountered when riding t o high altitudes.
B. Specifications
Main j et
Jet needle
Needle jet
Starter jet
Float height
Pilot jet
Low speed screw
Fuel valve seat
NOTE: The low speed mixture screw settings are
adjusted at the factory with the use of specialized
equipment. Do not attempt t o change these set-
tings.
C. Disassembly
1. Prepare t o separate carburetors (separation not
necessary if only float level adjustment or
throttle slide inspection i s to be done).
move starter lever ( 1 ). Loosen starter lever (2)
securing screws and remove starter lever rod.
2.
Remove upper and lower brackets. Note posi-
tion of synchronizing screws for guidance in
reassembly. Separate carburetors.
CAR B U R ETION
#145
4 H 1 1 - 3
Y-2
#45
26.6mm (abovegasket
surface)
#17.5
preset
2.0mm
Remove vacuum chamber cover. Remove the
3.
spring, needle fitting plate, needle, and dia-
phragm (vacuum piston).
4. Note that there
phragm. There are matching recesses in the
carburetor body for the diaphragm tabs.
T
Re-
To inspect starter jet, remove three
5.
holding the starter body t o the left side of the
carburetor.
are tabs on the rubber dia-
screws
(3)
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