Carburation; Carburettors; Floats Levelling; Adjusting Idling Speed Without Vacuometer - MOTO GUZZI 850 Le Mans II Workshop Manual

217
160
m
CARBURATION
30.1 CARBURETTORS (fig . 217)
2 Dell' O rto car buretto rs " PHF 36 8( 0 )>> ( r ight),
.PHF 368(8). (lel1).
Controls
• Throttle control gri p on the right handlebar.
• Starter lever for col d eng ine starts on the left
hand cyli nder rocker cover .
.. A" Slart position .
.. 8.. Riding position.
Carburettor settings
Choke
Thro ttle valve
Atomi zer
Ma in jet
Idling jet
Starter jet
Pump je t
Taper needle
Float
36 mm 0
60
265 A B
140
60
70
38
K 5 (2nd notch )
10 grams
Idling screw :
1 112 turn open .
30.2
FLOATS LEVELLING
See para «15.2» in chapter "Carbu ration ».
The only difference is Ine checking template part
N. 14926950. Being these 10 grams floats the
size from the carburettor body to the float top
should be 23.5 mm (.96/1) see
fig .
84.
30.3 ADJUSTING IDLING SPEED WITHOUT
VACUOMETER
(fig . 217)
Proceed as follows:
1 Ensure that with starter lever in position «8 »
there is about 3 mm play ( .118/1) between the
starter cable ends and adjusting screws «E» for
both carburettors.
2 Ensure that with the throttl e grip fully closed
there is a play of about 1- 1.5 mm (.039-.059" ).
If not , loosen nuts «F" and sc rew in or out cable
tensio ners «E ». At the end of this ope ration tigh-
ten nuts «F» (fig . 209) .
3 Run the engine up to its normal operating
temperature. Sc rew idli ng screws «C o> full y in
and then screw them out one and a half turn.
4 Using both hand s at the same time, check if
the exhaust pipe pressu res are equal. If there is
any noticeable pressure difference, operate on
screw «0 " of one carbu rettor until the pressure
wil l be the same as the other (idl ing speed w ill
have to be kept at about 1000-1100 rpm and ac-
cordingly it may be necessary to screw in the
screw of the carburetlor for the cy linder giving
a lower exhaust p ressure, or screw out the sc rew
of the carburetlor for the cylinder giving a higher
exhaust pressu re.