MOTO GUZZI 850-T User manual

S.C . .R.A. · mod : 019 - 11-74 - Sao -Printed in Italy -Marlan l- Bergamo

Dear rider,
First ot all we wish to thank you tor choosing this motorcycle ot our
production.
By tollowing the instructions outlined in this manual you will ensure
your bike a long and troubletree lite.
Betore riding, please read thoroughly this manual in
order to know your
motorcycle's teatures and how to operate
it sately.
All major checking and overhaul jobs are best carried out by our dea-
lers who have the necessary tacilities to quickly and competently .r epair
your Moto Guzzi.
Repairs or adjustments
by other than a Guzzi dealer during the ,war pJ 1nty
period could invalidate the warranty 'right.

INDEX
4 Main features
10 Controls and accessories
12 Identification data
13 Instruments and controls
19 Riding instructions
22 Maintenance
28 Removal of wheels
31 Lubrication and maintenance chart
36 Lubrications
39 Carburation
42 Valve gearing
43 Ignition -Checking and adjustment of double contact breaker
45 Checking of ignition timing "fixed advance»
47 Electrical equipment

4 MAIN FEATURES
Engine
Valve gear
Carburation
2- cylinder 4- stroke
Cylinder disposition
Bore
Stroke
Displacement
Compress ion ratio
Revs. at max.
engine speed
Maximum horsepower
O.H.V. push rod operated .
Timing data :
inlet: opens
closes
exhaust: opens
closes
20 ° before TDC
52" after BDC
52 ° before BDC
20° after TDC
« V,. 900
mm 83
mm 78
cc 844
9,5
7000 r.p.m.
HP
68
Rocker clearance for valve timing mm 1, 5.
Normal rocker clearance, cold engine, mm 0,22.
2 Dell'
Orto carburetors type VHB 30 CD (right) .
VHB 30 CS (left).

Lubrication
Generator
Ignition
Ignition data
Starting
Pressure, by gear pump. 5
Normal. lubrication pressure 3,8 -;- 4,2 kg/sqcm
(controlled by relief-valve).
Electrically controlled oil pressure gauge.
Front
(14 V - 13 A) on the mainshaft.
By battery, with double
contact breaker and auto-
matic advance.
Initial advance
Automatic advance
Full advance
Contact breaker gap mm 0,42 -;- 0,48
Spark plugs:
long thread (0
14x1 , 2S)
Thermal degree 240
Plug points gap mm 0,6
2 ignition coils.
8'
26 °
34°
Electric starter with el
ectromagnetic ratchet con-
trol. Ring gear bolted on flywheel. Starter button,
right on the handlebar.

6 Trasmission
Clutch
Gear box
Frame
Suspension
Wheels
Dry type, twin plates, flywheel driven. Controlled
by lever, on the handlebar (left).
Five speeds, frontal engagement, constant mesh
gears. Cush drive incorporated.
Controlled by pedal on the left side of the mo-
torcycle.
Bevel gear ratio: 1 : 4,625 (Z = 8-37).
Overall gear ratios:
low gear = 1 : 11,424
second gear 1: 7,928
third gear 1: 5,980
fourth gear = 1 : 4, 963
top gear = 1 : 4,284
Duplex cradle, tubular structure.
Telescopic front fork incorporating hydraulic
dampers.
Rear swinging fork with externally
adjustable
springs.
Spoked rims, WM 3/2,15 x 18 front and rear.

Tires
Brakes
Dimensions and weights
Front
3,50H-18841 studded.
Rear 4,10H -
18841 studded.
Pressure:
front solo
kg/sqcm
with passenger 1,8
rear solo
2,2
kg/sqcm
with passenger
2,5
kg/sqcm
The above data are for normal riding (cruising
speed). If using the motorcycle at constant high '
speed or on motorways, it is recommended to
increase pressure
by 0,2 kg/sqcm.
Front: hydraulic disc brake. Disc 0 mm 300.
Controlled by lever, right on the handlebar.
Rear: expansion type
(0 220 x 25). Controlled by
pedal on the right side of the motorcycle.
Wheelbase m 1,470
Max. width m 0,780
Max. length m 2,200
Max. height m 1,060
Min. ground clearance m 0,150
Engine
weight (dry) with carburetors and elec-
7

8
Performances
Electrical equipment
trical equipment, without inlet silencers, exhaust
pipes and silencers kg 60,500
Curb weight
kg 235 a.
Maximum speed in each gear, solo riding:
Gears Speed
low gear km/h . 76 ( 47 m.p.h.)
second
gear km/h 110 ( 68 m.p.h.)
third
gear km/h 146 ( 90 m.p.h.)
fourth
gear km/h 176 (109 m.p.h.)
top gear
km/h 195 a. (121 m.p.h.)
Fuel consumption: I. 7,27 x 100 km (CUNA).
Battery
Headlight (lamp)
high and low beam
City
light
Rear light (lamp)
parking and stop
Turn signal lamps
Speedo and rev.
counter lamps
Neutral, generator, oil
and lights lamps
Horn
12 V - 32 Ah
12V - 45/40W
12 V - 5 W
12 V - 5/20W
12V - 21W
12V - 3 W
12V-1,2W
12 V

Braking ability
Passing of a 55 feet long truck travelling at 9
50 m.p.h.
-Time:
8,7 seconds
-Distance travelled: 900 feet
The above includes a safety
distance of 40 and
100 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): 193 feet.
Fuel and oil capacities
Group or part
Fuel tank
Reserve
Sump
Gear box
Rear drive box
(bevel set lubrication)
Front fork (each leg)
Front brake
Quantity Recommendation
I. 25
I. 4
I. 3,5
I. 0,750
I. 0,340
I. 0,020
I. 0,050
Petrol 98/100 NO-RM
Agip F.1 Supermotoroil
SAE 20W/50
Agip F.1 Rotra MP SAE 90
Agip F.1 Rotra MP SAE 90
Molykote type A
Agip F.1 ATF Dexron
Agip F.1 Brake fluid

10 CONTROLS AND ACCESSORIES
(fig. 2)
1 Front brake disc.
2 Front brake pliers.
3 Pump and fluid reservoir, front brake.
4 Front brake control lever.
5 Throttle control
grip .
6 Starter and engine emergency stop.
7 Key switch.
8 Fuel filler cap.
9 Rear brake pedal.
10 Footrest
11 Footrest passenger.
12
Headlight.
13
Front turn signals.
14 Indicator panel.
15 Speedometer
16
Rev-counter.
17 Clutch control lever.
18 Horn, flashing light and turn signals buttons.
19 Lighting switch.
20 Gearshift pedal.
21 Rear turn signals.
22 Rear light.
Right and left are intended as if seen in riding
position.

11
1 2 3 4 5 6 7 8 9 i 1
12 13 14 15 16 17 18 19 20 22
2

12 IDENTIFICATION DATA
(fig. 3)
Every motorcycle is identified by a serial numbei
which is stamped
on the frame downtube and
on the crankcase.
The number on the frame
downtube appears
also in the certificate of conformity and is va-
lid to legal effects for the identification of the
motorcycle.
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 war-
ranty right.
Warranty
The warranty Is valid for a period of 6 months
with a limitation of
10000 km from the seiling
date and expires In case of modifications to
the motorcycle
or participation to racing com-
petitions.
Tyres as well as parts
or accessories which are
not manufactured
In the factory «SEIMM Moto
Guzzi» are out of warranty.
Each new motorcycle is supplied with a «cou-
pon-book».
This book has to be carefully kept with all other
circulation papers as this is the only document
entitling the owner to be recognized of the war-
ranty right from SEIMM Moto Guzzi on the basis
_ _ _ .... _...;;....;.;.. ___ .....J 3 of the general sale conditions.

INSTRUMENTS AND CONTROLS
Instrument panel
(fig. 4)
Mile counter.
2 Rev.-counter.
3 Red warning
light indicating insufficient cur-
rent from the generator for battery charge. It
must go out when the engine reaches a certain
number of revolutions.
4
4 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.
S Red warning light. Oil pressure gauge. It goes
13

14 out when the pressure is sufficient for normal
engine lubrication. 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.
Ignition key and steering lock
The key has four positions (fig. 5):
6 Green light indicating lights on.
By day riding
all warning lights are to be out;
by night only the green warning light is on.
Standstill, key not removable.
«I»
(intermediate)
Turned anticlockwise, standstill, key removable. Steering locked on removal of
key and turning
of the handlebar right or left.
Turned clockwise, between position «0» and position «2», key removable. In
this position the key can be removed without locking the steering.
Turned clockwise, ready to start, all controls are in.

Lights switch
Left, on the handlebar, 4 positions (fig. 6 «8 » ).
«1» OFF Lights off.
«2» PARK Rear light.
«3» L
«5»
Low beam.
High beam.
Safety
(to come back to position
OFF press the button towards the
left).
6
Horn, flashing light
and turn signals
Left, on the handlebar (fig. 6 «C»).
« 6 » HORN Horn button.
« 7 » FLASH Flashing light button.
« 8» 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 Starting and engine
emergency stop
Right, on the handlebar (fig. 7 «A»).
With the ignition key in position « 2» the motor-
cycle is ready to be started. To start the engine
(see «A») press the button «
1» START.
To stop the engine (in case of emergency) turn
the button in position
«3» or «4» OFF.
Carburetor starter control
The two levers for starting a cold engine are
located left on the left
carburetor and right on
the right car
buretor (fig. 23).
«A» Starting position.
«8» Riding position
Throttle control
Right on the handlebar; throttle is opened by
turning toward the rider and closed viceversa.
Clutch control lever
Left on the handlebar, to be used for starting
and gearshifting
only .
Front brake control lever
Right on the handlebar, connected with the brake
pump fluid reservoir.
Rear brake pedal
On the ri ght side of the motorcycle.

Gearshift pedal
On the left side of the motorcycle (fig. 8).
Low gear: pedal down.
2. 3. 4. and top gear: pedal up.
Neutral position: between low and 2nd gear.
Before operating the gearshift pedal, the clutch
lever has to be completely pulled in.
9
10
Fuel filler cap
To open it, press the control button «A» (fig. 9).
Fuel taps
They are l ocated rear , under the fuel tank
(fig. 10).
Positions:
«A» Open (vertical).
«R» Reserve (horizontal) see «R» on the taps.
« C» Closed (horizontal) see «C» on the taps.
17

18 Terminal block with fuses
It is located under the seat (fig. 11) and holds
n. 6 15 A fuses.
11