MOTO GUZZI Le mans 1000 Instruction manual

WORKSHOP MANUAL
COD. 28920161
Additions totheWorkshopmanual for the models V1 000 G5 e 1000 SP -Cod. 179201 61

The illustrations and descriptions In this booklet are indicative only and the manufacturer reserves itself
the right to Introduce any modification it may deem necessary for betterperformance or for constructive
or co~merclal reasons at any time and without prior notice .
SEIMM MOTO GUZZI- TECHNICALPUBLICATIONS
COD.28920161
200 -4/ 87 -Printed in Italy-D.E.Ca -Ravenna

DIRECTION FORA CORRECT USEOFTHEVEHICLE
We remind that this model, due to its exceptional peculiarities, is almost a racing bike requiring a sport
riding. -
For this reason it meets so much fans'favour
but, as for racing bikes, the technique of its use must be
adequatG.
First of all we have to evaluate that it fits carburettors with fuel feed pumps and when throttle control is
not correctly operated in connection with engine revolutions per minute, a petrol overflood can be
determined, causing coming outbythe same carbs. and finishing insidethe aircleaner.
When riding at idle speed or better, at a low r.p.m. range, it is necessary that throttle valve opening is
graduated since a largerquantity of fuel could
be not absorbable by th~ engine; at averyhigh r.p.m. range,
also with strong accelerating action, fuel is totally absorbed and used, giving the bike that smart
acceleration itis famousfor.
243
305

INDEX
244
1 Dashboard
4
light switch -horn push-button and direction indicators
6 Startpush-button -engine stopand light control switches
18 Fuse holding box
23 Saddlelocking device
1 Clutch leveradjustment
2
R.H .front brake lever ad j us tment
4 Rearsuspensions adjustment
8 Headlightbeam adjustment
' M~III~NANCEANDLUBRICATI()NQP E RATIONS ' .... .. ··<. pa .\. h ./ ~ .·'·. 2 .. •• .••.••.5.• .. •'.•· ., .' .. ·. 2.• ·.' .. '·.···.,·.· .••..••. • .•.••. · •. i.· ..• • •.••.••. '.' ..•.•••...••• , ••.•.•. ' .•....•.••.•.•.••...• ' .•• , .•. · .• • •. 1
................... :: .. : ... ::. ... : .. :.:.::.; •. :.: .. -:::.:.:::,::'::<,.:;:,:".::.:::.;::::;.:.,::::.; ... ; •
b .'.··.·· •. •·.•.• •. · Ii: ·.·,,' . ·, •. ', .·.··.' ,b .".·,.".''.·.·.·.· t ·.'·".·· N .:.· . ·.·'.: .. ·.':.·· E·.'··. ····.·. : .. :',.,.:, ~ ,' ... , ... ,.' .... :,.' .•• ,.: ... ~ : .•.•....• ,. ·',·.' ··:·.' E :·'.'·. b .'.:.·.'.:.'· 'U .".·',,...'.:'.' A ·,··,'.·.····· .· 'U·'· .... ':.'·· ; ,'.·'···,',·. I '·.··: N ·'.·'.·,··'.'.·.·. ~ .·.·.·:.·.':.·.··. ' .'.·.' A '··.·.·.·.'·.'.'.'.·:.···. ~ .·.·.·.i l .·· D :.":'·.'.·'··.·.· C ·.".'·:·'.'.· H ·;.·,.·.'·· e '·.··.·.·.'.'.· "' .·.··· . ·,·.··:,· J(1 ... ·.:.·.·.·.' : ':·.'.·.·' N· .. ·.· ... ·G .·.'.··· ...... :.': ••.. ".' •.. :: .••.• ,•••..., •.... : ..•••.•. ,.' ..•....••.•.••.••.• :, •.. ' .•.. '.......... ... ......... . .' . •..... ··•••••· ·• ... 1
GUl Q ~¥ nn.a . ~ g u ~ uu .•. ",., .• y ·r.r.
u.
page? 53P d<r
6 Va lves and va l ve -guid es
8 Valve springs
12 Cylinders
13 Pistons
" ;. ;- . ." ". " .;. .' .'.,' . . '.' " . .'. ", '. ',' . . '. ', : - ":. . -; :.: ',:. :::. :. :. :' :: ::: . :: ;: ' ' : :.~: :. .: .:
. : :. ::~ :~: ~ ~ . } :~~ :~: :. :: .:: :: :; ::: ;: ::. "
... .. .. .. ... ·t~l~ltl~~~~.\~~1·l\tI11~;~-~x~
1 Timing data
7 Tappetclearance
1 Carburetors
6 Aircleanerreplacement
• •••••••••••

20 Frontwheel
21 Rearwheel
22 Tyres
23 Hydraulicbrakesystems
. ... . .......... . .... . ... \ .... . .. . ... .. ...• . ....... .. . ... ...... .. .. . .. ... .. .. ...
245

II MAINSPECIFICATIONS
ENGINE
-cylinderconfiguration
-bore
-stroke
-total capacity
-compression ratio
-max. torque
-fiscal rating
VALVETIMING
FUEL FEEDING
LUBRICATION
ALTERNATOR/GENERATOR
IGNITION
- ignition data
-breakerpointsgap
-ignition sparkplugs
-sparkplugselectrodes gap
-ignitioncoils
STARTING
TRANSMISSIONS
CLUTCH
PRIMARYTRANSMISSION
GEARBOX
-gearboxratios:
1st
2nd
3rd
4th
5th
246
4-stroke, twin cylinders
90° « V» twin
88mm
78mm
948. 8cc
10: 1
8.43 kgm a6250 r.p.m.
12HP
O.H.C.with rods and rocker arms
no. 2 Dell'Orto carbs. PHM 40
NO (R.H.)
PHM 40 NS (L.H.) type.
forced lubrication system with gear pump -wirenet and cartridge
filters installed
in the sump -standard lubricating pressure 3.8 +
4.2 kg/cmq (controlled by a special valve installed on the sump)
electric transmitter for insufficient pressure indication on
the
crankcase
installed on the front side ofcrankshaft (14V -20A)
by ignition distributor wi th double breaker and automatic advance
by centrifugal masses
first advance (fixed)
automatic advance
total advance (fixed + automatic)
0.37 + 0.43 mm
BOSCHW5DC
0.6mm
8° ±1 °
26°
±2 °
34°± 1°
no. 2installed on the frame abovethe engine
electric by start motor (12V -0.7KW) equipped with
electromagneticcontrol coupling
crown gear fixed to the engine flywheel START push button
placed rightsideon the handlebar
drytypewith twodriven discs
positionned on the engineflywheel
controlled by leveron the leftsideofhandlebar
bygears, ratio 1.235 :1(Z = 17/21)
five speed constant-mesh gearbox, front coupling. Built-in flexible
coupling;
control by pedal placed on the L.H. sideofvehicle
1 2
(Z
= 14/28)
1 1.388
(Z
= 18/25)
1 1.047
(Z
= 21 /22)
1 0.869
(Z
= 23/20)
1 0.750
(Z
= 28/ 21 )

SECONDARY TRANSMISSION byshaftwith universaljointand gears
-ratio 1 : 4.714 (Z = 7/33)
-final drive ratio (engine-to-wheel):
1stspeed 1 : 11 .647
2nd speed 1': 8.088
3rd speed 1 : 6.100
4th speed 1 : 5.063
5th speed 1 : 4.367
FRAME
SUSPENSIONS
-front
-rear
WHEELS
-front
-rear
TYRES
-front
-rear
BRAKES
-front
-rear
DIMENSIONS AND WEIGHTS
-pitch (laden)
max. length
- max .width
-max.
height (windscreen)
-min.
height from ground
-
dryweight
PERFORMANCES
-max. speed
-fuel consumption
REFUELINGS
-fuel tank
(4
I. reserve)
-
engine sump
- gearbox
-transmission
(bevel gears lubrication)
-
telescopic fork(each leg)
- front and rear brakes
decomposabledoublecradlewith tubularstructure
telescopic fork "MOTOGUZZI patent"with hydraulic shock-absor-
bers
swinging fork with adjustable springs concentric to the hydraulic
shock-absorbers
in lightalloywith rims
16MT2.50H2
18 MT3 .00 H2
120/80 V 16"
130/80 V 18"
Type: Tubeless or Tube-Type
floating disc with fixed caliper and twin braking cylinder -manually
controlled by handlever placed R.
H. on the handlebar -hydraulic
transmission independentfrom the rearbrake:
0disc270mm
obraking cylinder38 mm
opump 12.7 mm
floating disc with fixed caliper and twin braking cylinder -pedal
control placed on the R.H. centre ofthe vehicle:
0disc270mm
obraking cylinder38 mm
opump 15.875mm
the rear brake is connected by hydraulic transmission to the L.H.
front brake having in its components the same dimensions as
the
R.H. front brake, handcontrolled
1.514m
2.160 m
0.680m
1.220m
0.120m
215Kg.
230 Km/hwith driveronly
5.41.1100 Km
241. Superpetrol (97 NO-RM/min)
31. of «Agip SINT 2000 SAE 10W/50» oil
0.750 I. of «AGIP Rotra MP SAE 80 W/90» oil
0.250
I. of which: 0.230 I. of «AgipRotraMP SAE80W/90»
and 0. 20 I. of «Agip Rocol ASO/R» typeoil
0.150 L of «Agip F.1 ATF Dexron» fluid
«Agip F.1Brake Fluid -
SAE J 1703»fluid
247

II CHECKING DEVICESAND CONTROLS
5.1 DASHBOARD(fig. 306)
1 Key switch forconnection as follows:
"OFF» in linewith
"C» mark: stopped vehicle. Key
maybe removed (no connection).
"A» in line with "C» mark (key turned in clockwise
direction): vehicle ready to start. All devices are
connected. Key cannotbe removed.
,,8» in line with "C» mark (key turned in clockwise
direction): stopped vehicle. With "A» switch offig.
307 in "PARK» position parking light is on. Key
mayberemoved.
2 Voltmeter.
3 Rev. counter
4 Speedometer.
5 Trip recorderzeroing knob.
6 Warn.light (green light) for
l.H. blinker.
7 Warn. light (green light) R.H.blinker.
8 Warn. light (bleu light) high beam on.
9 Warn.light(green light) parking lights on.
10 Warn. light ("Neutral» green light) neutral
pos. of gearbox. It is on only when gearbox is in
this position.
11 Warn light(red light) generatorcurrent delive-
ry. To be off when engine has reached a certain
r.p.
m. range.
12 Warn. light (red light) oil pressure. To be off
when pressure is sufficient to insure engine lubri-
cation. If the warn. light does not estinguish, pres-
sure is not the prescribed one;
in this case it is ne-
cessary to stop engine at once and investigate for
the reason.
13 Warn. light (red light) starting the insufficient
fluid level in the front l.H . and rear brake master
cylinder. When this indicatoris lit, fluid level has to
be restored, at the same time checking that there
isnot leakagefrom the hydraulicsystem.
14 Emergency flashers switch (placed on the
l.H. supportofheadlight).
5.4 LIGHTS SWITCH -HORN PUSH-BUTTON
AND DIRECTIONINDICATORS (fig.307)
Placed L.H. on the handlebar.
ccA» switch
"PARK »position
"ON» position
«OFF» position
ccB» switch
parking lights.
biluxlampon.
lightsoff.
~ position R.H. turn indicator.
~ position l.H. turn indicator.
ccC» push-button
horn control.
248
306
~ ______________________________ ~307

5.6 START PUSH-BUTTON LIGHTS CON-
TROL SWITCH AND ENGINE STOP
SWITCH (fig. 308)
Installedon the
R. H.sideofhandlebar.
With
"A" markon the key in line with the "C" mark
(see fig. 306) vehicle is ready to start. To start en-
gineact as follows:
• make sure that "B" switch is on central posi-
tion;
• strongly pull the clutch lever ("0,, in fig. 307);
• is engine is cold, bring the
"starter" lever on
starting position;
• press on "A" startpush-button.
To stop engine acton the ignition switch placed on
dashboard.
To stop in an emergency case, "B" switch has to
be turned upwards or downwards.
Once engine is stopped, turn key in the switch (fig.
306) in anticlockwise direction until the "OFF"
mark is not in line with "C" mark, then extract the
key.
«E" switch
With "A" switch (fig. 307) in " ON" position:
"LO" position lowbeam.
"HI" position high beam.
"Flash" position flashing light.
5.18 FUSE HOLDER (fig. 309)
Placed
in the central zone of motorcycle; to have
accessto it,removethe saddle.
In this seatyou will find five fuses of 15 A.
Before replacing one fuse or more, the fault deter-
mining the blowing up must be detected (see
"Electricsystem legend").
. 1 Emergencyflashers.
2 Direction indicators -Parking lights -Instru-
mentclusterlights-Parking lights indicator.
3 High and low beams -Front brake "stop" light
hydraulic control- Voltmeter-Brake fluid level,en-
gine oil pressure, generator and neutral warn.
lights.
4 Horn solenoid.
5 Starting solenoid and rearbrake"stop"light hy-
draulicswitch.
5.23 SADDLE LOCKING DEVICE (fig.310)
Saddle is locked by a ,<A" special lockset placed
L.H.in the rearsideofmotorcycle.
To unlock it, turn key a quarter of a turn in anti-
clockwise direction and strongly push the lockset.
Saddle will be automatically lifted, so being remo-
vable.
To lock it, it is necessary to insert it into its seat on
the frame and presson it.
L...--- ____________ ---l 308
\,
\'
\, \
,
\. \
, \,
"
~---~~~~~-- ____ ---l309
UNLOCKING LOCKING
~-------------------- ______ ~310
249

II MAINTENANCEAND ADJUSTMENTS
6.1 CLUTCH LEVER ADJUSTMENT(fig. 311)
To adjust play between lever and handlebar con-
nection, if higher or lower than 3 -;- 4 mm., act as
follows: have the rubber diaphragm pulled back
and actuate
«A» setscrew up to the prescribed fi-
gures. Adjustment may be arranged also on «9"
wire-stretcher, after having loosened «G" coun-
ternutsplaced R. H. on the gearbox.
6.2 R.H. FRONT BRAKE LEVER ADJUST-
MENT(fig. 312)
Acertain play
is foreseen between mastercylinder
float and control leverend.
It is possible to adjust this play,changing the "9,,
washers quantity placed on the STOP «A» switch
positionned underthe mastercylinder transparent
body.
6.4 REAR DAMPERS ADJUSTMENT (figg. 313
and314)
Rear suspension spring load can
be adjusted in
three different positions, using special wrench «A"
shown in fig. 313.
Moreover
it is possible to adjustthe damping effect
ofrearsuspensions actuating
"A" disc in fig. 314.
In accoradance with the specific needs and the
bike load, there are four adjusting positions:
• 1position very soft for a light load;
• 2 position for bike use as solo or pilot plus pil-
lion on good roads (forinstance: highways);
• 3 position for sport use as solo or pilot plus
pillion with luggage;
• 4 position very stiff, for use as pilot plus pillion
and heavyluggage.
After some time of use and long journeys, to com-
pensate the natural lo~s of damping effect, an hi-
gher adjustment of rear suspension could be ne-
cessary.
If you ascertain that damping effect of shock-ab-
sorbers is not correct or regular, have them chec-
ked at an authorized workshop ofourdealers.
N.B. -Fora good stability of motorcycle it is al-
ways advisable to ascertain that both shock-
absorbers are adjusted on the same pOSition,
for what concerns the setting disc and the
spring chargeas well.
250
~ ______________________________ ~ 311
~ ____________________________ ~312
L....- _____________________________ ..l 313
~ ____________________________ ~314