MOTO GUZZI 850-T User manual

850 - T
OWNER'S MANUAL
Pt# 1790 0000

Dear rider,
First of all we wish to thank you for choosing this motorcycle of our
preduction.
By following the instructions outlined
in this manual you will ensure
your bike s long
and troublefree life.
Before riding, please read thoroughly this manual in order
to know your
motorcycle's feafures and how
to operate it safely.
All major checking and overhaul jobs are best carried out by our dea-
lers who have the necessary
fa cilities to quic /e ly and competently repair
your Mota Guzzi.
Repairs
or adjustments by other than a G uz zi dealer during the warranty
period
could invalidate th e wa rranty right.

INDEX
4 Main features
10 Controls and accessor ie s
12 Identification deta
13 Instruments and controls
19 Riding instructions
22 Maintenance
28 Removal or wheels
31 Lubrication and maintenance chart
36 Lubrications
39 Carburation
42 Valve gear ing
43 Ignition -Checking and ad justment of double contact breaker
45 Checking of ignition timing .. fixed ad '/ance ..
47 El ectr ic al eq uipment

4 MAIN FEATURES
Engine
Valve g ea r
C arbu ra li on
2-cylinder 4·stroke
C
ylinder ci isposition
Bore
Stroke
Disp la cemen t
Compression ratio
Revs. at max. engine speed
Maximum horsepower
O.H.V. push rod operated.
T
iming data:
inlet: opens 20"' before TOe
closes 52' aHer BOC
exhaust: opens 52* before SOC
clos es 20- after TOe
.v .. 9 0"
mm 83
mm 78
cc 844
9,5
7000 r.p. m.
H? 65
Recker clearance for valve timing mm 1. :.
Nor mal rocker clearance, ce ld engine, mm 0,22.
2 Oell'Orto carbu re tors type VHB 30 CD (right).
VHB 30 CS (left).

Lubr icati on
Ge nerat or
Ignillon
Ignition data
Starting
Pressure, by
gear pump.
Normal lubrication pressure 3, 8";- 4,2 kg /sqcm
(controlled by re li ef-valve).
El ectr ica lly controlled o il pressure gauge.
Front (14 V - 13 A) on the mainshaft.
By ba ttery, with double contact breaker and auto-
matic advance.
In
iti el advance
Automatic advance
Fu ll advance
Contact break
S' r gap mm 0,42 + 0,48
Spark plugs:
long th read (0 14 x 1,25)
Thermal degree
240
Plug points gap mm 0,6
2 ignition coil s.
S'
26'
Electric starter with el ectromagnet ic ra tchet con ·
trol. Ring gear bolted on flywheel. Starter button.
ri ght on the handlebar.
5

6 Trasmission
CIU ICh
Gear box
Frame
Suspen sio n
Wheels
Dry type, twin plates. flywheel driven. Contro ll ed
by lever, on the handlebar (left).
Fi ve speeds, frontal engagement. constant mesh
gears. Cush dr iv e incorporated.
Controlled by pedal on the left side of the mo-
torcycle.
Bevel gear ,a/io: 1 : 4,625 (Z =8-37 ).
Overall gear ratios:
low gear = 1 : 11 . 424
second gear = 1: 7,928
third gear = 1: 5, 9EO
fourth gear = 1: 4,963
top gear ::::: 1: 4,284
Duplex cradl e, tubular structure.
Telescopic front fork
incorpora t i n~ hydrau li c
dampers.
Rear swinging fork with externa
ll y ac j ustab le
springs.
Spoked rims, WM 3/ 2.15 x 18 front and l sa r.

Tires
Brakes
Dimensions and weights
Front 3,
50 H - 18 S 41 studded.
Rear 4.10 H -
18 S ~1 studded.
Pressure:
front $010
with passenger
r ear solo
with passenger
1.8 kg /sqcm
2.2
kg /sqcm
2 .5 kg /sqcm
The abovg data Bre for normal rid ing (cruising
speed). If us;ng Ihe motorcycle at consrant h; gh
speed or on mo/orNays, It is recommended to
increase pr~ssure by 0,2 kg/sqcm.
Fro nl: hydraulic di sc brake. Disc ~ mm 300.
Controlled by lever, right on the handlebar.
Rear: expansion type (0 220 x 25) . Controll ee by
pedal on th e right side of the motorcycle.
Wheelbase m
1,470
Max. wi dth m 0,780
Max. tength m 2 .200
Max. height m 1,OSO
Min. ground clearance m 0,150
Engine we ight (dry) with carburetors and elec-
7

8
Performances
Electrical equipment
Passing ability
tr ical equipme nt , without inlet silencers. exhaust
pi pes and s il encers kg 60 ,5 00
Cu rb wei gh t kg 235 a.
Maximum speed in each gear. 5010 riding:
Gears Spe ed
1 01'1 gear km / h 76 ( 47 m.p.h .)
second gear km / h 110 ( 63 m. p. h.)
thi rd gear km / h 146 ( 90 m.p. h.)
fourth gear km / h 176 (109 m.p. h. )
top gear km / h 195 a. (12 m.p.h .)
Fuel consumption: I. 7.27 x 100 km (CUNA ).
Battery
Headlight of sea l ed beam type
Rear light (lamp)
parki ng and slop
Turn signal lamps
Spesdo and rev . counter lam ps
Neutral, generator, o il
and lights tamps
Horn
12 V - 32Ah
12V-S / '<OW
12V - 21 W
12 '1 - 3 W
12 '1 -1.2 W
12V
Passi ng of a 55 fes! long t ru ck travelling at
20 m.p.h.
-Time:
- Distance trave
ll ed: 6,5 seconds
334 fe2t

Braking ability
Passing of a 55 fee! long truck travelling at 9
50 m.p.h.
-Time:
- Oistanc~ travelled: 8,7 seconds
900 feet
The above includes a safe ty distance of 40 and
1 00 feet respectively between the passing and
pace vehicle at the beginning and end of the
manoeuvre.
Slopping distance from 60 m.p.h. (so l o, using
both brak es ): 17i feel.
Stoppi
ng distance with passenger from SO m.p.h.
(us ing both brakes): 193 1eet.
Fuel and oil capacities
Group or part
Fuel tank
Reserve
Sump
Gear box
Rear dr ive box
(bevel set lubrication)
Fr ont f ork (each leg)
Front brake
Quantity Recommendation
I. 25
I. 4
I. 3.5
I. 0,750
I. 0.340
I. 0.02
I. 0.050
Pe trol 98 / 100 NO -AM
Ag ip F .1 Supermotoroil
SA: 20 W/ 50 .
Ag ip F .1 Rotta MP SAE S
Ag ip F .l Rotra MP SA: 90
Molykote type A
Ag ip 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 contro l lever.
S
Throttle contro l grip.
6 Starter and engine emergency stop.
7 Key switch .
8 Fuel filler cap.
9 Rear brake pedal.
10 Footrest
11 Footrest passenger.
12 Head ligh t.
13 Fro nt turn si gna ls.
14 Indicator panel.
15 Mile counter.
16 Rev·counter.
17 Clutch control lever.
18 Horn. flashi ng light and turn sig r. als bueons.
19 Lighting switch.
20 Gearshift pedal.
21 Rear turn signals.
22 Rear light.
Right and lelt ars Imsnded as if se~n in tiding
position.

11
12 13 14 15
18 19
21
22
2

12 IDENTIFICATION DATA
(fig. 3)
E'lery
motorcyc le is identified by a se rial numoei
which Is stamped on the frame downtube and
on the crankcase.
T
he nu mber on the frame downtube appears
also in the certificate
of conformity and is .... a ~
lid to legal effects for the identification of the
motorcycle.

INSTRUMENTS AND CONTROLS
Instrument pan el
(fig. 4)
M ile counter.
2 RS 'I. -counter.
3 Red warning light i nd ica iing insufficient cu r-
fant from the generator for battery c haige. It
m ust go o ut wh en t he eng in e reaches e cer tain
number of revo lutions.
4 Orange neutral Indicator. It lights when t he
gearbox is in neutral position. It may be we ll to
ma ke sure that th is positi on is correc!. In an y
c:~ se It is a good practice to pu ll the clutch be -
fore starting.
5 Re d wa rn in g light. Oil press ure gaug e. It g oes
13

14 out when the pressure is sufficient for normal
engine
lubr ication. Should it not go out, the pre~·
sure is not correc t; in this case the angine has
to be stopped and su itable chec kings are to be
carried o
ut
Ig nition key and steering loc k
The key has fQur positions (fig. 5):
6 High beam warning light (red).
By da y riding all warning lighls ar e to be out.
·0 · Standstill. key not
re movable.
· 1.
(i ntermediate)
Turned anticlockwise, standstill, key removable. Steering locked on removal of
key and turning of
th e handlebar right or refl
Turned clockwise, be!ween position -0 .. and position -2 ., key removable. In
this position the key can be remov ed without locki ng the steering.
Turned c
lock wi se . raaey to start, all controls are in.

Lights swi tch
Left, on the handlebar, -4 positions (fig. 6 .. a .. ).
.. , .. OFF Lights oH.
.. 2 .. PARK Rear light.
• 3. L Low beam.
.. 4 .. H High beam.
•5. Safety (to come back to posit ion
OFF press the button towards 1he
lelt).
~ 'I . f~ .:: - .... -: .. - .--:-: -~ . -
. ...-. --':" .
_l~;
Horn, flashing light
and turn signals
left, on th o handlebar (fig. 6 -C o) .
• 6 .. HO RN Horn button.
.. 7 .. F LASH Fl ash i ng light button.
.. 8 .. Turn signals button.
.. 9 .. When turned to the right operates t he right
sig na ls.
- 10. When turned to the l eft operates: the le ft
signalS.
.... '"';.' ". -:- -.-
15

16 Starting and engine
emergency stop
Righ t. on the handle bar (fig. 7 .A· ).
With the i gn ition key in pos ition . 2 .. the motor·
cycle is ready to be started. To start the engi ne
(see -A.) press the button .. 1 .. START.
To s top the ~ ng i ne (in case of emergency) turn
the butten in pos itio n .. 3 .. or .4. OFF.
Carburetor starter control
T he two levers for starting a cold engi na are
located left on t he left ca rburetor and right on
the right c arbu retor (fig. 23).
.. A .. S tarting ~os jti on .
•8 .. R idi ng pos ition
Throttle control
Right on the ha ndleb ar; thr o tt le is opened by
turni ng toward the rider and closed viceversa.
Clutch control lever
.Left on the ha ndlebar, to be used for starti ng
and gearshifting only.
Front brake control lever
Right on the handlebar. connected with the brake
pump fluid reservoir.
Rear brake pedal
On the right side of the motor cyc le.

Gearshift pedal
On the left sice of ~he motorcycle (fig. 8).
l ow gear: pedal down.
2. 3, 4. and top geer : peda l up.
Neutral position: between low and 2nd gear.
B elo re op~ rat i ng the gears hift pedal, the clutch
lever has to be camp/staiy pu ll ed in.
,.
•
-,' 10
Fuel filler cap
To open it. press the control button .A. (fig. 9).
Fuel taps
They are loca ted fear , under the fuel tank
(I ig. 10 ).
Pos itions:
-A.. Open (vertica l) .
-R oo Reserve (horizontal) see cR_ on the tap s.
.C. Closed (horizontal) see • C· on the taps.
17

18 Terminal b lock with fuses
It is located under the seat (fig. 11 ) and ho l ds
n. 6 15 A fuses .
11

RIDING INSTRUCTIONS
Chec :<ing
Befo re start i ng the engine ensure t hat:
• there is sufficient fuel in the tank;
• the o il in th e eng in e sump is at correct le vel;
• the ig nit ion ke y is in po sition -2- (s ee fig. 5 );
• the wa rning li gh ts: r ed (o il pressure 9au9';
and generator ); or ange { neutra l i nd i cator } are lit;
• the sta rt er levers 0 :1 the car bure t ors , for col d
eng in e are in starting position (v ertical ) see -A ..
in fig. 23 .
Engine starting.
Aft er t he f ir st checking. tt!r Q. the tw ist gr ip 1 / ~
towards the ri der and push the start butto(l . ri gh t
on the ha nd l eb ar -1- S TA RT in fig. 7.
After the eng i ne has been starIsd. bef ore ret urn -
i ng the staner con!rol levers into riding position
(horizontal) see .8 .. in fig. 23. let the engine id le
a short while in the hot season and a few minu-
tes in the co ld season.
S:,ould the cont ro l starter levers be left In start-
ing pos iti on . An In fig. 2 3) by rid ing, there would
be Irregu lar carburction and Increas ed luel con-
sumption and ev en worse. there could be the pos-
s ibili ty 01 seizures because of too much pe lrol
going in lo the cylinders.
Do
nOi forget t h ~ t if the engine is in gear. the
neutral i nd i cator lig ht (orange) is not lit: to start
th e ~ n g i n s in sue .; co nd itions could be very dan-
gerous, unless the clutch Is kept lu lly disenga-
ged, as the motorcycle
itsell may stan off .
Starting a hot engine
In this C2se it is not necessary to set the sta i! er
control levers on the carburetors in startin s; pc-
s ition ( .. A .. in fig. 23 ) as this wo uld richen t he
carburati oio tco much.
19