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  9. MOTO GUZZI V750 Ambassador User manual

MOTO GUZZI V750 Ambassador User manual

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Ambassadol'
rider's
handbook
Ambassador
V
750
RIDER
' S
HANDBOOK
2
INTRODUCTION This booklet
is
intended
to
provide owners
with the necessary information on
oper
ating
and
maintaining their machines for maximum
efficiency.
The manual should be read very carefully
as most troubles
and
failures arising from
neglect
or
poor
maintenance will be avoided
if
all the instructions herein contained
are
strictly followed.
Don't forget that all
major
overhaul jobs
and
repairs
are
best carried
out
by officially
appointed Moto Guzzi dealers
who
have the
necessary facilities to quickly
and
competen.
tly repair
your
Moto Guzzi.
IN
D E X Running
in
Controls and accessories
Identification
data
Tool
ki
t
Main features _ Engine
Frame
Instr
uments
and
controls
Ignition key
Starting
button
Ignition swit
ch
keys
Steering lock
Steering lock keys
Dimmer switch
and
horn
button
Clutch lever
Twist grip
throttle
control
Air lever
Gearshift lever
Front
brake
lever
Rear
brake
pedal
Riding instructions
lubrication
chart
lubrication
and
general m
ai
nte-
nance
Servicing instruc
ti
ons
lubrication
of
engine
Oil pressure relief valve
Oil pressure gauge
lubrication
of transmission
lubrication
of
rear
wheel drive
lubrication
of fr
ont
fork and hy-
draulic
dampers
lubrication
of bevels in
the
stee~
ring
....
~~
p,,.
5
• 6
•
JO
•
11
• 12
•
16
• 18
• 19
• 19
• 20
•
20
•
20
•
20
• 20
• 20
•
21
•
21
•
21
•
21
• 22
•
25
• 27
• 29
•
29
•
31
•
31
•
31
• 32
• 33
• 33
3
4
Lubrication of whee! bearings
Lubrication of rear fork bearings
C(!rburation
Air filter
Fuel
tank
Fuel
taps
Mufflers
Valve gearing
Tappet clearance
Checking valve riming
Ignition
Distributor
Spark plugs
Checking of ignition timing
Checking
of
ignition advance by
stroboscope lamp
Adjustments
Generator belt
Clutch lever
Steering
Steering lock
Front brake lever
Rear brake pedal
Rear suspension units
Removal of wheels
Front wheel
Rear wheel
Electrical equipment
Wiring diagram -
USA
model
Wiring diagram -European model
p ~
ge
33
•
33
• 35
•
40
•
40
•
41
•
42
•
43
•
43
•
43
•
46
•
46
•
47
•
47
•
48
•
51
•
51
•
51
•
51
• 54
• 55
•
57
•
57
•
60
•
60
• 60
• 62
•
71
• 72
RUNNING
IN
After the
first 500 kms.
(300 miles )
Ev
er
y 500 kms.
(300 mile
s)
"5iiJ
-
~
During the first 1600 kms.
(1000
miles),
a
new
or
overhauled machine ought to
be
used
with some intelligence as the efficiency, per-
formance, and life
of
the engine are largely
dependant on how it
is
run in.
The engine should never be allowed to reach
a high
number
of revolutions before it has
had a chance to
warm
up sufficiently. Never
ride the machine
at
the highest permissible
speeds for each gear before the machine has
been well broken in.
Should th eengine speed drop off consider-
ably on an uphill grade, a lower gear should
be immediately engaged.
In
case
of
overhea-
ting,
it
is
best to st
op
and allow the engine
to cool down.
Under no circumstances whatever should the
following speeds be exceeded
in
the running
in
period.
Maximum permissible
speeds:
Distance: up to 800 kms.
(500
miles):
in
low gear
45
kms.
(28
miles)
in
second gear
65
kms.
(40.5
miles)
in
third gear
85
kms.
(53
mile})
in
high gear 110 kms.
(68
miles')
from 800 to 1600 kms.
(500
to 1000
miles):
in
low ge(!( 55 kms.
(34.5
miles)
in
second gear 80 kms.
(50
miles)
in
third gear 105 kms.
(65
miles)
in
high gear 135 kms.
(84
miles)
From 1600 to 3000 kms.
(1000
to 1
800
miles) the speed can
be
gradually increased
up to the maximum permissible limits.
Change the engine oil.
Tighten all nuts and bolts.
Check valve clearance.
Check
distributor
points.
Check oil level. Correct level
is
in betwEIen
the minimum and maximum mark on the
filler
cap
dipstick.
5
CONTROLS AND ACCESSORIES
(See
fig. I )
•
1. Front
brake
lever
2. Air control lever
3.
Throttle
control
grip
4.
Slarter
button
5. Filler
cap
6. Gearshift lever
7. Pillion footrests
8. Pillion handgrip
9. Headlight
10. Speedometer
11. Ignition key
12. Rev-counter
13. Clutch lever
14.
light
switch
and
horn
button
15
. Side
stand
16. Rear
brake
pedal
17
. Footrests
18. Center
sland
19. Tail light
The machine can also be supplied with gear-
shift lever
on
the
left
and
rear
brake
pedal!
on
the
right.
N.B, •
TIM
I
...
ml
...
ri
ght
" a
nd
• 1ft,,, In
,he
lui
If.
uo.-d In 1M
..
n
..
t
...
.,
would
app-a
.
10
one
IIUi",
In ,
...
udell
•.
1
tt<:"'--"
- 2
~
---
3
::-----
4
14
5
15
16
17
1
Fig
. 1
7
8 9
Identification
data
(See
fig.
4)
10
Every machine
is
identified with a serial num-
ber which
is
stamped on the frame down tube
end
on
the left hend crankcase cover.
Fig
. 4
Tool kit
(See fig.
5)
1.
Box
wrench, 19-21-22 mm.
2.
Open ended wrench, 17-19 mm.
3.
Open ended wrench, 10·11 mm.
4. Tappet adjusting wrench
5.
Box
wrench, 8-9
mm.
6. Allen
key
(5
hex)
7.
Box
wrench, 10·14 mm.
8. Universal pliers
9. Adjustable wrench
10. Screwdriver
11. Ring wrench, 27 mm.
12. Rear
damper
adjusting wrench
13.
Tool
bag
Fig.
5
11
MAIN
FEATURES
ENGINE
(
Se
a
fig.
5/1)
12
Cycle
Number
of cylinders
Cylinder
dispo
sition
Bore
Stroke
Disp
l
a~emenl
4
strokes
,
«v,. 90"
83
mm
.
(3
.
26")
70
mm.
(2.75
" )
757.486
ce.
( 46.21
cll.in.)
Fig
. 5/ 1
Valve gear
Compression
ratio:
9 to 1
Re
vs
at
maximum
engine speed 6500 r.p.m.
Outpu
t
at
mi)Kimum
engine speed
Crankcase
Cylinders
Cy
l
inder
heads
Crankshaft
Crankshaft
supports
Conne<:ting rods
Pistons
60
HP
5AE
in
light
alloy
in light alloy
with
hard
chr
omed barrels
in
light
alloy,
hemisphe-
rical, with special cast
iron
inserted
seats.
steel construction
in
anti·friction
mate
rial
pressed
in 2
suitable
housings
(as
used
in
al
l
Fl
race
ca
r
s)
steel construction with
AL·TIN alloy
thin
wa
ll
bearings
in
light
alloy
O.H.v., push
rod
operated
via
the
camshaf
t
in
the crankcase
and
gear driven by
the
crankshaft.
Inlet:
- opens 24
<>
before
Toe
-closes
58
<>
after
BOC
E)(haust:
-opens 58" after
BDC
-closes 22'"
after
TDC
Rocker clearance for valve
timing:
-
0.5
mm.
(.0196")
Normal rocker clearance
(co
ld
engine):
inlet
0.15
mm.
(.0059")
-e)(haust
0.25
mm.
(.0098")
Lubrication
Cooling
Ignilion
14
2 DeIl'Orto
carburetors
type
VHB
29
CD
(right)
and
VHB
29
CS
(left)
both gravity
fed from
the
tank.
Standard
ca
rburetor
$etting
Ch
oke
29
mm.
Throttle slide
60
-Atomizer 265
-Main jet 1
45
-Pilot jet 45
-
Starter
atomizer
80
With needle SV9 set
at
second notch from
top:
idling screw open I
and
112
turns
for
the
left
carbu
r
etor
and
I
and
3n . 2
turns
for the right
carburetor.
With needle SV5 third notch from
top:
idling screw open
1
1f~
to 2
turns
for the
left
carburetor
and
2.21
12
turns
for the right
carburetor.
Air intake provided with
dry
f
il
ler
.
Pressure, by gear
pump
driven by
the
crank-
shaft.
Oil
strainer
in
crankcase.
No
rmal lubrication
pressure
3.8·
4
.2
kgs/sq.
cm.
(54
to
60
Ibs sq.in.) controlled by relief
villive.
Electrically controlled oil
pressure
gauge.
By
air. Cylinder
and
cylinder head deeply
finned.
By
battery
with
automatic
advance distri-
butor.
Initial
advance:
10".
Automatic advillnce: 28".
Ignition timing 38" full advance.
Starting
Exh
aust system
TRANSMISSION
Clutch
Gear box
Se<o
ndary
drive
Contact
breaker
gap:
0.42-0.48
mm
.
(.016"-
.0IS·').
Spark
plug:
n. 225
in
Bosch-Marelli scale or
equivalent_
Plugs point
gap:
0.6 mm.
(.023")
Ignitioo coil.
Electric
starter
with
electromagnetic ratchet
control.
Ring
gear
bolted
on
flwheel.
Operated
by
sta
rter
button.
Dual exhaust pipes
and
mufflers.
Twin driven plates, dry type, locillted on the
flywheel. Controlled by lever
on
l
eft
hand-
lebar.
Four speeds, frontal engagement. Conslllnt
mesh gears. Cush drive incorporated.
Separate case bolted
on
crankclls
fI
, ope
rated
by
rocker pedal on
the
right side of
the
machine.
Engine gear-box
ratio:
Inlernal gear
ratios:
-
Low
gear
-Serond
gear
-Third gear .
-High gear
to 1.375
(16-22)
to 2.230
(13·29)
to
1.333
(18
·
24)
to 0.954
(22·21)
to 0.750
(24-18)
By
constant speed double joint
cardan
shaft
lllyshaft bevel gears-rear wheel
ratio:
Overall gear
ralios:
-
Low
gear .
-Serond gear
-Third gear
-High
gear
_
4.375
(8-35)
to
13
.4
15
to
8.0
18
10
5.738
to
4.511
15
ijljW1!l
®m
FRAME
Suspension
Wheels
Tires
Tire pressure
Brakes
Overall
dimensions
and weight
16
Duplex cradle, tubular structure.
Telescopic front fork incorporating hydraulic
dampers.
Rear swinging fork with externally adjustable
springs.
18)(3
rims, front and rear.
4.00)(18 front and rear, block type (high
speed).
Front
tire:
solo p<lssenger !
with 1.5 kgs/sq.cm. =
21
p.s.i.
Rear
tire:
solo
with passenger 1.8 kgs/sq.cm. = 25 p.s.i.
2.0 kgs/sq.cm. = 28 p.s.i.
N.
S
..
The
~bove
rec
om
me
nd
ation is for
norm
at
riding (
uui
sing
spee
d).
If
using
the
machi
ne
~
t
con. l
an
t h
ig
h
speed
Or
On
motorw
ly",
th
e
~
bov
e
pr
euu
r
e.
should
be
i
ncr
eao
ed
by 0 .2 kg
./l
q.
cm
.
( 2.8 p
.•.
i.
J.
Twin leading shoes front brake operated by
hand lever
on
the right handlebar.
Large rear
brake
operat
ed
on left hand side
of machine.
Wheelbase 1.470 mts. (about 57.8"
Length 2.245 mts.
{about
88.3"'
Width 0.830 mts.
(about
32.6"
Height (
dry)
1.070 mts.
(about
4
2.1"
Minimum ground
clearance 0.150 mts. (about
5.9"
Curb weight 228 kgs.
(about
502 Ibs.)
Performance Maximum permissible speeds and gradients
climbable
in
each gear, solo riding.
Low
gear:
62
kms/h
( 38.5
m.p.h.)
climbing ability:
90%
Second
gear:
104.250
kms/h
(64
.6 m.p.h.
climbing ability:
40%
Third
gear:
145.250
kms/h
(89.2
m.p.h.)
climbing ability:
20%
High
gear:
185.276
kms/h
(liS
m.p.h.)
climbing ability:
8%
Fuel consumption Measured according to
CUNA
standards:
37 m.p.g. (US).
Fuel .
Hld
oil
Fuel
tank:
22.5 liters
(5.84
US
gls.) inclu-
ca
pacities ding about 4 liters reserve
(about
1
US
gl.).
Petrol 98
NO
(Regular
octane)
-
Sump
3 liters
(3
1j
-l
quarts)
Shell Super Motor Oil 100 -
Transmission 0.750 liters
(1
%
pints)
Shell
Spirax 90 E.P. -
Re<lr
wheel drive 0.300 liters
(5/8
pints) Shell Spirax 90
E.P.
-Front fork
dampers 0.160 liters = 5.4 oz
US
Shell Tel-
lux 33.
17