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MOTO GUZZI Stornello sportcc, Stornello sport 125 cc Owner's manual

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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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~
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12
7
-
--
--==~
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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