MOTO GUZZI Stornello sport 125 cc Owner's manual

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

"6l1ZZIIGM

2279

Sn

645

~

180

50

68

75

10

34~

TUbO

sCd,.i,()

~

CO

C\a

...

QI

u

C

~

iii

til

u:::

.

~

u..

-

..t:

tn

"

;:

01

u

>-

u

...

o

:E

M

tn

i.L

9

1 -

----

-JC-_

2-

----t----<

r-

""-'"

_______

'"

10

3

--~~1m

~~~

~~

4

5

---

--I--+

~

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

MAINTENANCE

INSTRUCTIONS

Before st

arting

make

su

re th

ere

is

sufficie

nt

petro

l

in

tbe

crankcase

well. Oi l

le

vel

is

checked

by

means

of

the

di

pst

i

ck

we

ld

ed

on

to

the

fi

ll

er

cap.

Correct

o

il

level is in

between

the

minimum

and

maximum

marks

(fig. 5 ). Thi s c

heck

shou

ld

be

made

with

the

filler

cap

unscr

ewed.

Under

no

circumstances

should

hills

be

descended

with

the

g

ear

in

neutral

or

th

e

clutch

disengaged.

It

is

far

better

to

ut

ilize

th

e

braking

effect of

the

engine

w

ith

the

throt

tle

control

at

min

imum

ope

n.

in

g.

Steep

hills s

hould

be

descended

in

th

e

l

ower

g

ea

r

s,

as this will

save

ove

rhe

a

ting

of

the

drum

s

and

wear

of

th linings.

On

w t

or

slippery

roads

proceed

with

the

ut

most

cere,

avoidin

9 viole

nt

ac

cele

ration

and/or

fierce

br

ak

ln

gs

. In

suc

h

co

nditi

ons, it

Is

well to

conside

r

decreasing

slightly

the

tyre

pressure.

Hills s

hould

be

c

limbed

in

the

gear

which

allows

the

eng

ine

to

run

at

no

rmal

revolutions

.

Under

no

circumstances

whatever

sho

uld

hills

be

climbed

by

slipping

the

clutch

.

This

wo

uld

rep

i

dly

wear

the

plates

out.

Particu

l

ar

care

shou

ld be

taken

not

to

excee

d

the

maximum

speeds

in

the

diff r

nt

gears

specif

i

ed

in

« Pe

rform

ances:>.

Fuel taps

The left

tap

is

the

reserve

tap

and

s

hould

be

kept

closed

for

use

in

an

emergency

only

: H

owever,

it is

1)

goed ru le

to

oc

casionall

y

check

its efficiency

and

to

cl

ec:n

it

out

if

ob

s

tr

uc

ted

by

grit

or

other

foreign

matter

.

Ignition key

Before

the

eng

ine can

be

s

tarted

or

the

el

ectrica

l

equipment

used,

it is

necessa

ry

for

the

ignition

key to

be

pushed

right

14

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

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