Section 04
FUEL SYSTEM
Subsection 03
(CARBURETOR AND AIR INTAKE SILENCER)
VMR2004_017_04_03A.FM
04-03-3
GENERAL
Before performing any job on fuel system, always
disconnect BLACK (-) cable from battery.
CARBURETOR
CAUTION:
Although some jets can be replaced
by other jets from other carburetors, such mod-
ifications shouldn’t be performed. They can
greatly affect engine calibration and can cause
severe damage to engine. Use only recommend-
ed jetting specific for this carburetor.
Removal
Remove seat.
Loosen both carburetor and air box clamps.
Unplug all hoses from carburetor
no. 1
.
NOTE:
To ease reinstallation, mark all hoses be-
fore unplugging.
Turn carburetor to place the throttle cable housing
on top, then remove the throttle cable. Refer to
THROTTLE CABLE further in this section.
Pull out carburetor.
Cleaning and Inspection
The entire carburetor should be cleaned with a
general solvent and dried with compressed air be-
fore disassembly.
CAUTION:
Heavy duty carburetor cleaner may
be harmful to the float material and to the rub-
ber parts, O-rings, etc. Therefore, it is recom-
mended to remove those parts prior to cleaning.
Carburetor body and jets should be cleaned in a
carburetor cleaner following manufacturer’s in-
structions.
Check the diaphragm for crack or other damages.
Replace if necessary.
Carburetor Float Level Adjustment
Correct fuel level in float chamber is vital toward
maximum engine efficiency. To check for correct
float level proceed as follows:
– Remove float bowl
no. 2
and gasket
no. 3
from
carburetor.
– Make sure that float arm
no. 4
is symmetric,
not distorted.
With carburetor chamber up side down:
– Measure height between bowl seat and the
top edge of float arm. Use float level gauge
(P/N 529 035 520).
– Keep float level gauge perfectly vertical and in line
with main jet hole.
Ensure that both float level gauge tips are properly
positioned on carburetor body and that “L” arm is
leaning on float with compressing valve spring.
Refer to following photos for proper float level gauge
positioning and to TECHNICAL DATA for proper
level.
TYPICAL
1. Gauge tips
2. “L” arm
A. Height
WARNING
Always disconnect battery exactly in the
specified order, BLACK (-) cable first. It is rec-
ommended to disconnect electrical connec-
tions prior to disconnecting fuel lines.
WARNING
Solvent with a low flash point such as gaso-
line, naphtha, benzol, etc., should not be used
as they are flammable and explosive.
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Содержание DS 650
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