MOTO GUZZI Stornello sport 125 cc Owner's manual

MOTO GUZZI
Brand
MOTO GUZZI
Model
Stornello sport 125 cc
Type
Owner's manual

This manual is also suitable for

STORNEllO
SPORI
125
cc
RIDER'S
HANDBOOK
s " ( l
lllil
110111.
OIL
MOTO
GUZZI
SOCIETA
PER
AZIONI
STAB
ILlMENt O E AMMINISTRAZIONE :
Mandello
del Lario
(C
o
mo)
Via Emanuele V. Parodi,
57
Te
l
efoni:
Mandello
L
ar
io
71
.112
(4
linee
con
ri
ce
r
ca
automa
t!
ca
)
Le
eco
22.691
Collegamento
ponte-radio
co
n
Mi
lano e Genova
Tel
egrammi:
Motoguzzi -
Mande
llo Lario
SEDE
LE
GA
LE :
Mi
l
an
o
Vi
a D
urini
N.
28
Telefoni :
705
.
784
-
705.785
- Tele
grammi:
Motoguzzi
Milano
FI
L
IALE
-
CEN
T
RO
R I
CAMBI
Mi
lano
(640)
- Via
Giovanni
da '
p,r-C;it
ida, 14
Tel
efoni:
.
<8
41.421
/34
1.
296/38
1
.997/384
.
033
Telegr
.:
Filialmotogu
zz
i - Milano
UFFICI :
Genova
- C.so
Aurelio
Saffi,
29
Telefoni :
55.242/55
.
243/55.244/55
.
245
T
elegrammi:
Peromer
• G
nova
Ro
ma
• Via
Barberlnl,
S6
. Telefono
484.758
T
elegremml:
Motoguzzi - Roma
Napoli - Piazza
Municipio,
84
- Telefono
310
.581
Tel
egrammi:
Motoguzzi - Napoli
Torino - Corso Unione Sovietica,
70
- T
elefono
500.
173
Tel
egrammi:
Motoguzzi - T
or
ino
STORNEllO
SPORT
125
cc
TOOL
KIT
Allen
wr
ench
, oil
drain
cap:
Screwdriver
.
Spanner,
tapp
et
ad
ju
stmen
t
Double
ended
spanner
8-10
mm
.
Double
ended
box
spanner
14
-17
mm.
Spanner
, h
exagona
l
grooved
cy
li
ndriCal
head
icrews.
Plug
sp
ann
er,
19
-21-22
mm.,
box.
Tyre levers,
2.
Tyre
inflator
.
Instru
ction
booklet.
ENGINE
AND
FRAME
NUMBERS
E
c:h
machine
has
a sing le
seri
al
number
for
both
frame
and
engine
. This
number
is
stamped
on
the
right
down
tube
of
the
frame
and
on
the
front
crankcase
cover. It is
the
only
numb
er
valid
for
e
ll
$elling
end
legal
purposes
and
it
app
ears
also
in
th
e
certlfleete
of
.
origin
and
the
circu
lation
boo
k.
This
number
should
always
be
referred
to
when
orde
ring
spa
re
parts
.
INDEX
Control
s
and
accessories
Page
9
General
characteristics
»
10
Maintenance
instructions
»
14
f=uel
taps
»
14
Ignition
key
» 14
Starting
the
engine
15
Racing
th
e e
ngin
e
16
Starting
the
mo
t
or
cycle
16
Use
of
gear
box
»
16
Stopping
the
machine
»
17
Stopping
the
engin
e
17
Inspection
»
18
Storing
th
e
m
achIne
»
18
Carburat
ion
fau
l
ts
end
cures
»
18
Ignition
fault
s
and
c
ur
es
18
Loss
of
compressi
on
19
Overheating
19
III use
of
machine
»
20
Running
in
20
Important
notice
»
20
Table
for
peri
od
i
ca
l
maintenance
21
Lubrication
of
engin
e
gear-box
unit
23
Centrifugal
filter
»
26
Chain
lubrication
»
27
Telescopic
fr
'
ont
fork
»
28
Carburettor
»
31
Cleaning
of
silencer
Page
35
Valve
timing
»
35
Ignition
timing
»
38
Igniti
on
»
38
Spark
plug
»
40
Cylinder
h
ead
and
val
ves
»
40
Ta
ppet
adjustm
en
t
»
41
Clutch
adjus
tme
nt
»
41
Steering
h
ead
adjustment
»
41
Chain
adjustment
»
43
Adju
stment
of h
and
l
bar
contro
ls
»
44
Fr
ont
brllke
ad
j u
stment
"
44
Adju
stment
of
rear
brak
e
»
44
Removel
of
fron
t w h
ee
l
44
R
emove
l
of
rear
whee
l
»
46
Electrical
e
qui
pmen
t »
47
Wiring
diagram
»
47
Headlalllp
»
47
Changing
bulbs
end
fuses
»
47
Battery
»
47
Horn
and
dipper
switch
»
52
Elec
tric
horn
"
52
Cab
l
es
»
52
Genera
l
maintenance
»
52
Re-to
uch
i ng
paint
work
»
53
Tran
sfe
rs
»
53
H
ome
co
nce
ss
iona
ires
»
54
C
oncess
ionai
r
es
abro
ad
»
61
Punzonafura
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Fig
. 4 . Controls and accessories
CONTROLS and ACCESSORIES
(see
fig.
4)
Gr
e
en
lamp
for
city
light
s.
2
Ignition
key,
engine
starting
,
electrical
equipment,
and
lighting
system
.
3
Clutch
control
l
ever
4 Dip
switch
and
electric
horn
b
utton
5 P
etrol
fi
Il
er
cap
6
Rear
brak
e
peda
l
7
Ki
cks
tarter
8 R
ear
su
spe
nsion
and
hydrau
lic sh
oc
k
abs
o
rbe
rs
9
Speedometer
10 - Fr
on
·t
brak
e
lev
er
11
Twist
gr
ip
th
r
ot
tl
e
control
12
Gear
lev
er
13
Silencer
14
-
Rear
lam
p
for
plate
illuminati
on
an
d st
op
light
N.B. - I n
the
text
the
ter
ms
right
and
left are
used
in
the
sen
se
they
wo
uld
appear
to
one s
itting
in
the
saddle
.
9
Eng
i
ne
GENERAL CHARACTERISTICS
ENGINE
Single cyl
inder
f
our
stroke,
O.H.V.
Cylinder
In
lig
ht
alloy
with
special
cast
iron
inser
t
ed
l
iner,
25" incli-
n
ation
.
Cylinder he d
In
l
ight
a
ll
oy
with
valve
gear
runn
ing in
Valve r
opera
t
ion
Pu
sh
rod
and
rockers.
Stroke
Bore
Swept
vol
ume
R
tlng
Output
Compress
ion ratio
Ignition
o
il
bath
.
6
V -
:28
W
~
ywh
I a
lt
e
rn
ator
with
remote
H.T. coil.
58
mm.
52
m
m.
125
cc.
2 HP
8.5 HP
9.8
to 1
N.B. - Make sure the ba
tt
er
y I. alway. on whilst
ri
ding Or the rectifier
might soon get damaged.
Plug
Marelli
CW260L
Fuel
High
octa
ne
petrol.
Petrol
tank
capacity
ab
o
ut
14
.5
liters
(3
and
1
/4
gl
s. ). Tw
ist
grip
contr
olled
carburettor,
Dell'Orto
make
type
ME
18
BS
w
ith
air
filter a
nd
inlet
s
ilencer
type
B 20
B.
10
Lubrication
By
pressure
through
a
delivery
and
return
gear
pump.
The
oil is
contained
in
a
crankcase
well
of
about
1.9
liter
s
(7
/
16th
gls.)
capacity
.
Screen
pa
ttern
oi l
filter
in
the
crankcase,
centrifugal
filter
on
the
crankshaft.
Cooling
By
air
.
Cylinder
and
cyl
inder
head
extens
ively
finned
.
Clutch
Multipl
ate
clut
ch
in
oil
bath,
control
le
d by
handlebar
le
ver
.
Gear
box
Constant
me
sh
gears.
F
our
speeds
foot
operated.
Bott
om
gear
Second
gear
Thi
rd
gear
T
op
gear
Transmission
3.04
1.81
1.29
Primar
y
drive
by helical
gears.
Seco
ndary
drive
by
roller
chain.
Gear
ratios:
from
engine
to
gear
box
from
gear
box
to
chain
wheel
Overall
gear
rati
os
(
engine·rear
wheel)
:
Bottom
gear
Second
gear
Top
gear
Third
gear
2.8
2.94
(25
·
70)
( 16·
47)
25
14,9
10,6
8,2
11
Overa
ll
dimens
i
ons:
Wheelbase
Length
Width
Height
(dr
y ) .
F
RAM
E
Minimum
grou
nd
cl
ea
rance
(light
fr
om l
owe
st pa
rt
of
fra
me
)
Dry
we
igh
t
Susp
e
Ion
1.2
S0
1.9
00
O.
SS
O
0.900
0.160
about
m.
(SO
" )
m.
(76
" )
m.
(22')
m.
(36
" )
m.
(6
%
")
92 kgs
(202
Pr
on : , I s
copic
fo
rk
with hydra
ul
ic
dam
pers
.
Ibs. )
Rear:
swin
ging
fork
with
coil
springs
in hy
draulic
shock
ab
s
orbe
rs.
Wheels
Spoked
wh
ee
l rims 17 x 2 'I • .
Ty"
Fro
nt
2 '/2 x 17 rlbbe
d,
r
ea
r
2.75
x 17 R studd
ed
.
Brakes
E
xpand
ing t
ype.
T
wo
brakes:
one
on
the
front
whee
l
operated
by
lever
on
the
right
handlebar,
the
other
on
the
rear
wheel
operated
by
a
pedal
on
the
le
ft
hand
side
of
the
machine
.
Electrical equipment
Generator :
flywheel
alternator
.
Rectifier for
battery
charge
in
the
headlam
p.
12
Headlamp
with
key
for
engine
start
ing
and
operation
of
the
lighting
system.
This key is
also
used
as a
switch
for
city
and
country
lights.
5 inch
es
headlamp
. Dipp
er
sw
itch
and
electric
horn
button
on
handlebar
.
Rear
lamp
for
plate
i
llumin
ation,
parking,
and
stop
light.
Electric
horn
.
6 V 7
ampere
battery
.
Speedometer
Inc
orporat
ed in the h
ead
l
amp.
Performances
Gradients
clim
babl
e:
31 %
so
lo
on
goo
d s
urf
aced
roads.
Fuel
con
s
um
p
ti
on : 2.7 lit
ers
per
1
00
km
s. (
abo
ut 104
m.p.g.),
measu r
ed
acco
rding
to
CUNA
s
tand
a
rd
s.
Maximum
speed
s pe
rmi
ss
ibl
e in t
he
vario
us
gears
:
bott
om
gear
km
s.
33
(20.5
mil
es
)
second
ge
ar
})
55
(34.1
miles )
thire!
gear
})
77
(47
.8
miles)
top
gear
.
})
110
(ab
o
ut
70
miles)
13
down
in its «
contact»
position.
To
stop
the
engine,
the
key
should
always
be
withdrawn
from
contact.
Starting the engine
To
start
the
eng
ine
from
cold:
open
right
hand
fuel
tap,
check
if
gear
le
ver
is in
neutra
l,
push
ignition
key
down
in
its
Fig.
5
15
co
ntact
positi
on,
turn
twist
gr
ip
li
ght
ly,
push
down
ca
rburettor
a
ir
slide
(Fig
.
11
A)
,
and
depress
th
e
kickstarte
r
sha
rply.
One
or
two
kick
are
genera
lly s
ufficient
to
start
the
eng
ine.
When
s
tarti
ng
fr
om
co
ld,
and
especia
ll
y in w
int
er
tim
e,
it is
conven
i
ent
to
sl i
ghtly
fl
oo
d
the
carburettor,
taking
care
not
to
ove
rd
o this
as
it
may
th
en
make
star
ting
rather
dif-
ficult.
This is
unnecessary
to
start
a
hot
-
eng
ine.
In
the
cold
s
eason,
it is well
to
l
et
the
engine
idle a
shor
t
while
to
allow
the oil to
war
m
up
befo re
taking
off.
Be
s
ure
to
res
tore
the
air
s
li
de to its o
rigin
al r
idin
g
po
si
tion
.
N.B. - This engine can also
be
star
ted
wi
th
an
engaged
gear
by
depressing
the
kickst
arter
with
the
clutch
withdrawn
.
Racing the engine
Un
de
r
no
c
ir
cu
mste
nc s wh
ateve
r should
th
e
eng
i
ne
be
al l
ow
d
to
run
at
high
revo
lutions b
efo
re ta
king
off.
Starting
the
motor
cycle
Afte
r
the
engine is sta
rt
ed , w
ithdraw
fully
the
clutch
l
ever,
engage
bo
tt
om
gea
r,
and
sl
ow
ly re lease
th
e c
lutch
accelerating
the
engine at
th
sam
ti
me
as
th
e c
lut
ch s
tarts
to
« bite ».
U
se
of
gear- box
(s fig.
6)
To
change
to a
high
er
gear,
the
thr
o
tt
le sho
uld
be
s
hut
a
nd
th
e cl
utch
s
imultane
ously w
ith
drawn,
moving
the
gear
lever in
the
ne
xt p
osi
ti
on.
The
clut
ch
shou
ld then
be
rele
ased
slowly
and
the
thr
o
ttl
e
gradually
re-op
ened.
To
change
down,
the
pr
ocedure
is reve r
sed,
exce
pt
th
at
the
thr
o
ttle
sho
uld
not
be
co
mpl
etely cl
ose
d.
Change
up
rather
than
l
et
the
engine
race.
Change
d
ow
n
rather
than
let is slog.
16
Stopping the machine
To
come
to
a
standsti
II,
close
the
throttle
and
apply
bo
th
brakes
evenly.
Just
before
the
machine
stops,
pull
the
c
lutch
and
select
neutral.
In
case
of
an
emergency
stop
whi
l
st
go
ing in a
straight
line,
it is
advisable
to
use
both
brakes
sim
ult
aneously
to
avoid
wheel
lock
which
might
lead
to
the
danger
of
a fall.
Stopping the engine
To
stop
the
en
gin
e,
di
sco
nn
ec
t
the
ignition
key
from
its
«
contact
})
pos
iti
on
and
turn
off
the
fuel
tap.
Fig.
6
17
Inspection
After
a
wet
rid
e
or
one
over
particularly
bad
roads,
the
machine
should
always
be
checked
over
externally
and
dried.
Storing the machine
If
the
machine
is
being
pu
t
away
for
a fairly
long
period
:
-
Thoroughl
y
clean
the
mach
ine
«see
Periodical
Main-
tenance
».
-
Intr
oduce
a
li
t
tl
e o
il
into
the
cylind
er
through
the
plug
hole
and
r
evo
lve the
eng
ine a
few
times
to
even
ly
distribute
the
oil
over
the cy
li
nder
wa
lls.
- Raise
the
machine
so
that
the
tyres
are
out
of
contact
with
the
grou
nd,
espec
ia
ll
y if
the
fl
oo
r is
slippery
or
greasy.
~
Cover
with V s lin
or
ant
i
rust
co
mpound
all
metal
parts
not
name
ll
ed.
Carburation faults and cures
If
the
engine will not
sta
rt
or
s
tops
suddenly,
the
cause
may
be
one of
th
e
following
:
-
Lack
of
fu
I.
Ch
ck
if
there
is fuel in
the
tank,
also
if
the
tap
is
open.
--
Ob$truc-tlon 0
blow
throu
gh 0 r
fu I
pipes
and/o
r
filters.
Clean
and
th
ob
true
Ion .
-
Carbu
rettor
I ts
obstruet
d. CI
an
with
a
ir
jet.
Ignition faults and cures
If
the
engine
will
not
start
and
the
carburation
is in
order,
s
uspect
the
fault
in
the
ignition.
Check
if
there
is
a
spark
at
the
plug
by
holding
its
body
aga
i
nst
the
cylinder
and
revolving the
eng
ine
with
the
kicks
tarter
.
18
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MOTO GUZZI Stornello sport 125 cc Owner's manual

MOTO GUZZI
Brand
MOTO GUZZI
Model
Stornello sport 125 cc
Type
Owner's manual
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