MOTO GUZZI V1000 G5 Workshop Manual page 67

4
Using both hands at the same time, check
if
the
pressure at both exhaust pipe ends is uniform. In
case it is different, operate on screw "0,, of one
carburetlor till the pressures are equal (since the
idling speed has to be kept at about 900-1000 rpm, it
might be necessary to screw ant the carburetlor
screw of the cylinder giving a higher pressure or
screw in the carburetlor screw of the cylinder giving
a lower
pressure.
S Operating on screws "E», adjust each cylinder to
pOint where carburation is best (this is perceived
by a slight increase of the engine revs) and then re-
set idling speed as described at 4.
6 Disconnect one plug lead at the lime and check
that in each instance that the engine stops after
firing the same number of strokes (S or 6). If not,
undo screw .. 0» of the carbureltor for the cylinder
firing too much or screw in the carburettor screw
of the cylinder firing less.
7
Adjust idling speed to about 900-1000 rpm" screw-
ing in or out both screws .. 0" by the same amount.
S
Check if the throttle slides open simultaneously,
as follows:
• With the assistance of a second person, slowly
and gradually turn the twist grip and with both hands
check if the pressure increase at each exhaust pipe
end is synchronous.
• If not, adjust carburation of the cylinder in ad-
vance (as compared to the other) by gradually scre-
wing in cable adjuster .. F .. (after loosening counter-
nut
~G
.. ) until the pressure is the same lor both ex-
haust pipes.
15.4 CHECKING CARBURATION WITH A
VACUO METER
(fig. 85)
1 Check that both starter cables have about 3 mm
(.118") idle run at tensioners " H" entry (fig . 83). This
play is adjusted by loosening nut "I" and screwing
in or out screws .. H" (see fig. 83) .
2 Check that at their fitting end both tensioners
.. F .. cable screws have about 1-1.5 mm (.039-.059")
end play.
To adjust this play, undo locknut
"G~
and screw in
or out tensioner " F" (fig. 83) .
Then tighten again locknut " G ...
3 Adjust screw " E" (fig.83) screwing it in fully
and then undoing it 11/1 turns (for both ca rburetlors).
Undoing screw .. E .. increases the fuel II ow and vice
versa decreases it.
4 Undo both rubber caps of intake pipes " A" and
in their place I ii pipes .. 8 .. of vacuometer .. C .. .
5. To adjust idling speed (hot engine) proceed as
follows:
• Start the engine with the throttle con trol at mini-
mum opening and obtain about 900-1000 rpm. ope·
rating on throttle adjusting screw .. 0 .. (fig. 83).
Ensure now that both vacuometer col umns .. 0 ..
(fig. 85) are at same height. If not operate on screw
.. 0» (fig. 83) till they are at same level.
6 Adjust pOSition of idl ing screws "A .. (fig. 83) to
obtain the highest possible idling speed .
Ae-check now the position of vacuometer columns
,, 0 .. (fig. 85) and if necessary repeat operation n. S.
7 Synchronize the carburettors, after adjusting
idling speed. Do this operation as follows :
• Start the engine and accelerate graduatly, obser-
ving mercury columns " 0,, on the vacuometer dial
are lined up to each other (fig. 85). If not, loosen
counternut "G .. (fig.
83)
and operate on tensioners
«F» of gas control cables .. L" till both columns are
at same height.
After this, screw out the tubi ngs from the intake
housings .. 8 .. (fig. 85) and relit the securing screws
with their washers.
•
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85