MOTO GUZZI 850-T3 User manual

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S.C. R.A. mod . 052 . 6·75 . 4000 . Printed In Italy· Mariani · Alma ·Bergamo

Dear rider,
First of all we wish to thank you for choosing this motorcycle of our
production.
By following the instructions outlined in this' manual you will ensure
your
bike a long and troublefree life.
Before riding, please read throughly this manual in order to know your
motorcycle's features and how to operate it safely.
All major checking and overhaul jobs are best carried out by our dea-
lers who have the necessary facilities to quickly and competently repair
your Moto Guzzi.
Repais
or adjustments by other than a Guzzi dealer during the warranty
period could invalidate the warranty right.

INDEX
4 Main features
10 Controls and accessories
12 Identification data
13 Instruments and controls
20 Riding Instructions
21 Running in
23 Maintenance
29 Removal of wheels
32 Lubrication and maintenance chart
36 Lubrications
40 Carburation
43 Valve gearing
44 Ignition
48 Electrical equipment
50 LIGHTS (Europe model)
52 Wiring Diagram (Europe model)
54 LIGHTS (U.S.A. model)
57 Wiring Diagram (U.S.A. model)

4 MAIN FEATURES
Valve gear
Carburation
Lubrification
Generator
Ignition
2-cylinder 4-stroke
Cylinder disposition
Bore
Stroke
Displacement
Compression ratio
Output
«V" 90'
mm 83
mm 78
cc 844
9,5
HP 68 ,5 SAE at 7.000 r.p.m.
O.H .V. push rod operated.
2 Dell'Orto carburetors type VHB 30 CD (right),
VHB
30 CS (left).
Pressure, by gear pump.
Normal lubrication pressure 3,8
-;- 4,2 kg/sqcm
(controlled by relief-valve).
Electrically controlled oil pressure gauge.
Wire gauze and cartridge oil filters.
Front (14 V - 20 A) on the mainshaft.
By battery, with double contact breaker and auto-
matic advance.

Starting
Transmission
Clutch
Primary
drive
Gear box
Ignition data:
Initial advance (fixed) 2·
Automatic advance 31 ·
Full advance 33·
Contact breaker gap mm 0, 37 -7- 0,43
Spark plugs: .
Marelli CW 7 L; BOSCH W 225 ; AC - 44 XL
Plug points
gap mm 0,6
2 ignition coils.
Electri~ starter (12 V - 0,7 HP) with electromagne-
tic ratchet control. Ring gear bolted on flywheel.
Starter button, (START) right on the handlebar.
Dry type, multiplates, flywheel driven. Lever con-
trolled from handlebar (left).
via the gearbox.
Ratio :1:1,235
(Z = 17/21).
Five speeds, frontal engagement, constant mesh
gears. Gush drive incorporated.
5

6
Secondary
drive
Frame
Suspension
Pedal controlled from lett side of the motorycle
Ratioes:
low gear 1 : 2 (Z = 14/28)
2nd gear 1 : 1,388 (Z = 18/25)
2rd gear 1 : 1,047 (Z = 21/22)
4th. gear 1 : 0,869 (Z = 23/20)
top gear 1 : 0,750 (Z = 28/21)
cardan shaft (bevel gear set).-
Ratio: 1 : 4,714 (Z = 7/33).
Overall gear ratioes (engine/wheel):
low gear 1 : 11,643
2nd
gear 1 8,080
3rd.
gear 1 6,095
4th gear 1 ·5,059
top gear 1 4,366
Duplex cradle, tubular structure.
Telescopic front fork incorporating sealed hydrau-
lic dampers.
Rear swingin fork with externally adjustable
springs.

Wheels
Tires
Brakes
Spoked rims, WM 3/ 2,15 x 18 front and rear.
Front 3,50 H - 18 H
or 100/ 90 H - 18 H.
Rear 4,10 H - 18 H
or 110/ 90 H - 18 H.
Front:
Hydraulic
disc brake, (right) twin braking cylinder
caliper. Hand lever controlled from the handlebar
(R/H).
Hydraulic transmission, free from rear
braking system.
Disc dia.
300 mm.
Braking
cylinder dia. 38 mm.
Master
cylinder dia. 12,7 mm.
Twin hydraul
ic disc brake, (left) featured and di-
mensioned as above. Pedal lever controlled from
the motor cycle (R /H). Hydraulic transmission,
bound to rear braking system.
Rear:
Hydraulic
disc brake, twin braking cylinder ca-
liper . Pedal lever controlled from the motorcycle
(R/H).
Disc dia.
242 mm.
Braking
cylinder dia . 38 mm.
Master
cylinder dia. 15,857 mm.
Pedal
control actuates both twin front (left) and
rear brakes
at the same time .
7

8 Dimensions and weights
Performances
Fuel and oil capacities
Group or part
Fuel tank
(Reserve
I. 4)
Sump
Gear box
Wheelbase
Max. width
Max. length
Max. height
Min. ground clearance
Curb weight
m 1,470
m 0,780
m 2,200
m 1,060
m 0,150
kg 243
Maximum speed in each gear,
solo ri ding:
Gears Speed
low gear km/ h 71 , 837
second gear km/ h 103,502
third
gear km/ h 137, 339
fourth gear km/ h 165, 329
top gear km/ h 195
Fuel consumption: I. 6 x 100 km.
I. 24 Petrol 98 /100 NO-RM
I. 3 Agip SINT 2000
SAE
10 W/50
!. 0,750 Agip F.1 Rotra MP SAE 90

Rear drive box
(bevel set lubrification)
Front
fork (each leg)
Front and Rear Brakes
Passing ability
(U.S. Standards)
Braking ability
(U.S. Standards)
I. 0,230
I. 0, 020
Agip F.1 Rotra MP SAE 90
Molykote type A
I. 0,050
Agip F.1 ATF Dexron
Agip F.1 Brake fluid
Passing of a
55 feet long truck travelling at 20
m.p.h.
-Time:
-Distance travelled:
Passing of a 55 feet
50 m.p. h.
-Time:
-Distance travelled:
6,5 seconds
334 feet
long
truck travelling at
8,7 seconds
900 feet
The above includes a safety distance of 40 and
10,0 feet respectively between the passing and
pace vehicle at the beginning and end
of the
manoeuvre.
Stopping distance from
60 m.p.h. (solo, using
both brakes): 177 feet.
Stopping distance with passenger from 60 m.p.
h.
(using both brakes): 190 feet.
9

10 CONTROLS AND ACCESSORIES
(fig. 2)
1 Master cylinder (rig ht fr o nt brake)
2 Control lever (right
fr o nt brake)
3 Throttle control grip
4 Engine starting and e
mer gen cy stopping
button
5 Key switch
6 Fuel tank filler cap
7 Brake control pedal (left
front brak e and rear
brake)
8 Foot-rest
9 Pillion foot-rest
10 Headlight
11 Fro,nt turn signals
12 Instrument panel
13 Km or mile counter
14 Rev . counter
15 Clutch control lever
16 Buttons controlling horn. flashing light and
turn signals
17 Lighting switch
18 Gear change control rever
16 Buttons controlling horn; flashing light and
turn signals
Lighting switch
17 Gear change control lever
18 Rear turn signals
19 Tail lig ht
20 Master cylinder (left front and rear .brakes)
Right and left hand as seen in riding position.

11
20 18
18
19
2

12 IDENTIFICATION DATA
Every motorcycle is identified by a serial number
which
iJ) stamped on the frame downtube and
on the crankcase.
The number on the frame downtube appears
also in the certificate
of conformit y and is va-
lid to leg
al effects for the identification of the
motorcy
cle .
_ 1iilI1IItoli~-=' ________ ---.J 3
Spare parts
In case of parts replacement, make it sure that
«Original Moto Guzzi Spare Parts» only are used.
The use of non-genuine parts invalidates the
warranty right.

INSTRUMENTS AND CONTROLS -U.S.A. Model
Instrument panel (fig. 4)
1 Mile counter .
2 Rev.-counter.
3 Orange neutral indicator. It lights when the
gearbox is in neutral position.
It may be well to
make sure that this position is correct. In any
case it is a good practice to pull the-clutch be-
fore starting.
4 Red
light indicating parking light on.
5 Red warning light. Oil pressure gauge. It goes
out when the pressure is sufficient for normal
engine lubrification. Should it not go out , the pres-
sure is not
correct; in this case the engine has
to be stopped and suitable checkings are to be
carried out.
S High beam warning light (red).
7 Red warning
light indicating insufficient cur-
13

14 rent from the generator
for battery charge. It must
go out when the engine reaches a certain number
of revolutions.
By day riding all warning lights are to be out.
By
night riding the parking warning light only
and eventually the high beam warning light
are on.
Key Switch (fig. 5)
The key has three positions.
CHANGES FOR «EUROPE
MODEL»
1 Km counter.
4 Green town driving light.
S High beam warni ng light (blue).
By night riding the town driv ing warning light, only
and eventually the high beam warning light are
on.
«1 » (turned anticlockwise) Standstill, key removable.
«
0» (vertical) Standstill, key not removable.
«2 » (turned clockwise) Ready to start, all controls .are in. Key not removable.

Lighting switch (LIGHTS) (fig. 6 "A,,)
Left, on the handlebar, 4· positions.
~(1 ) OFF Lights off.
« 2,.
PARK Parking li ght (USA).
Town driving
light (Europe).
«3» L
Low beam.
«4 »)
H High beam.
«5» To
come back to position OFF press
the button towards the lefts.
6
Horn, flashing light
and turn signal controls (fig. 6 ,,8,,)
Left, on the handlebar.
"6,, HORN Horn button.
"7 ,, FLASH Flashing light button.
« 8" OFF Turn signals button.
«9" When turned to the right operates the right
signals.
<<10" When turned to the left operates the left
signals.
15

16 Engine starting and
emergency stopping (fig. 7 «A»)
Right, on the handlebar.
With the ignition key in position «2» in fig. 5, the
motorcycle is ready to be started. To start the
engine (see «A») presse the button
«1 » START.
To stop the engine (in case of emergency) turn
the button in position
«3» or «4 .. OFF.
After engine stopping reset key in position «0 ..
fig.5.
Starter control (fig. 27)
The control lever for starting a cold engine is
fixed to one
of screws securing rocker box cover
to left
cylinder head.
«A» Starting position.
«8» Riding position.
Throttle control (8 ,in fig. 27)
Right on the handlebar; throttle is opened by
turning toward the rider and closed viceversa. 8
Clutch control lever (C in fig. 6)
Left on the handlebar, to be used for starting
and gearshifting
only .
Front brake control lever (right)
(C in fig. 7)
Right on the handlebar, connected to its master
ylinder.

Brake control pedal (F in fig. 16)
On the rigth side of the motorcycle .
It controls both rear and left front brakes, link
connected to its master cylinder.
Gearshift pedal (fig. 8)
On the left side of the motorcycle (fig. 8).
Low gear: pedal down.
2.
3. 4. and top gear : pedal up.
9
Neutral position: between low and 2 nd gear. 17
Before operating the gearshift pedal, the clutch
lever has to be completely pulled in.
Fuel filler cap (fig. 9).
'To open it, press the control button «A ».
Fuel taps (fig. 10)
They are located rear; under the fuel tank

18 Positions:
«A» Open (vertical).
«R» Reserve (horizontal) see «R» on the taps.
«C» Closed (horizontal) see «C» on the taps.
Terminal block with fuses (fig. 11)
It is located under the seat (fig. 11) and holds n. 6
15A fuses.
«1» Rear stop light horn, flashing light.
«2» Starting relay. Turn sign'als.
11
12
«3» Warning lights. Oil-gen-N Low -High beam
with warning light.
«4» Parking or town driving lights -Instruments.
«56') ~ Spare fuse.
« » )
Steering locking (<<A» in fig. 12)
To lock:
-turn handlebar fully to the right.
-insert key into lock set, turn it anticlockwise