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160
CHAPTER SEVEN
carburetor and bend the float tang (Figure 30)
as required to get the right fuel level. Install the
float bowl and recheck the fuel level.
NO7'E
lf>ou
want the fuel level lower (a greater
drstunce below the carburetor body) bend
the tang so the floats stick up hrgher
rvhen held upslde down.
IDLE hlIXTURE ADJUSTMENT
(NON-US. MODELS)
The idle fuel/air
mixture
affects low-speed
emissions. as well as idling stability and
response off idle. On motorcycles imported
into the United States. the idle
mixture
screw is
set and sealed at the factory (Figure 20) and
requires no adjustment.
For other models, use t h e following
procedure.
1. Adjust the idle speed to specification.
2.
Turn each idle mixture screw in until it seats
lightly, then back it out the number of turns
specified in Table 1.
C2 UTION
N e w turn the ldle mixture screw in
tight. You'll damage the screw or ~ t s soft
seat In the carburetor.
3.
Readjust idle speed to specification, if
necessary.
4. Turn each mixture screw slightly again to
see if the idle speed increases. Readjust idle
speed. if necessary.
FAST IDLE ADJUSTMENT
Adjustment of the fast idle linkage should
rarely be required, but if the engine stalls when
the choke is used on a cold engine or if the idle
speed is too high when the choke is used,
remove the carburetors from the engine and
check that there is about 0.07 in. (1.8 mm)
clearance beween the bottom of the throttle
slide and the bottom of the throttle bore when
the choke is fully ON.
If the clearance is incorrect, loosen the fast
idle adjuster locknut and turn the adjuster as
required (Figure 31). Tighten the locknut.
@
Tang
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Zx550Kz550Kzx550

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