MOTO GUZZI 850 Le Mans III Instruction manual

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Additions to the \{orkshop maRual {«r thc s§$d*N* V'l§§S ffi§ and 1*S§ §P - §*dm"§?§§{}1§ï

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hiINT§ ON ïH§ PMSP§K $§§ s§ T§{l§ rd&Ys§§Yffik§
Due to its exceptionaily high featur*, this m*t*r*
tlicl* can be considered as in the raeing ma-
chine elass and as such has to be ridden in a
sËcrtsmanlike way. For this very reasön, ii has
met the ï*vour oÍ rnany motorcycie ians but,
§aÍ11s xs f*r eil racíng bikes, it has to be used ac-
enr*in§ly,
Ë*r inxtar:c*, íarir"lelfeed this model is fitted with
*nrburettnr* lvith §)um$l§ and if the twist grip is
nct L.sscd uCIrr*ci§y in aecordance with the en-
Ein* t*vnlutiuns, ther* nright be an excass of
fu*lr.,vhich is cject*d ï:y th* earhurefiors, ending
ir: th* air" fiiter box of the carburettors same.
When trav*lling at low speed or in other words at
low rsv§, it is necessary for the ihrottle grip to be
used with care since ihe immissron cÍ a greater
quantity of fuel might not be fully absorbed by
the engine.
At high speed, aiso in case oÍ abrupt accelera-
tions. the fuel is entirely absorbed and used up
by the engine. thus eliminating this risk and con-
ferring to this model the brilliant "krcking up"
qualities that make it one of its outstandir:g Íea-
tu res.

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Cyïlnders
Pis{*n*
*on*rcds
Crank*helft
Carbur*tt*rs
Float l*vel§ing
Replacins the air filter
=r'ont Íork lubrieati*n
Oil pneumatic shock nbg*rberc

&§§,§§§ §§&§&§§§§
§Nffi§N§
* *yli{'}{§*r *is$}**i§i*n
* à:mr*
* §lreKë
* e$ix5:la*em*nt
* ssr§$)rsssi*n n*ti*
* m{}x t*rqu*
v&tv{ï &Ë&§l§ts
*AIïrlurEAïlö§l
rli§§q{fiÀï}*§t
§§t l§§EAïf; § ÀL裏ï§IAïS§
i§§ïl*§l
* igrriti*n data
* *n*'ltm*t bremkmr poin{s 6ap
* spmrk piuq;*
* p{{rs p*int* 6*p
* igr"lill** uuilx
$ï&§ïiN{*
ï§-&NS§tïl§§t§r\{s
§LUïÖ§
$3§§MA$qY §&lV§
§§A§§OX
* §*er ratios:
§**w gear
fnd pear
Jrn gear
dth np;rr
§th g*mr
s§fisr'imÀÍïY *ntvE
* rmtio
* overail g*ar ratios
i*ngine-v,rh**l)
I nr", ncrc
{-\/ §Y V\-í.r,
Ënc§ g**r
§rd Ee*r
§th g*xn
§th g*mr
{win *y{ind*r - 4-strsk§
*V" §$*
Ë't crrl
ï§ rnrn
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u"tq* {-/'"r
l)Qtni
ï.§ ksrx ut §*fi§ rpm
O i"lV. 5rush roti operated
n" * enrhursttor§ "De{l'*rto*,typs plilï §S ï§ {S} (r}*ht}
rH$r SS § {§} {}efï}
$)r*§§{;r§, hy §*nr pu§1p
lvir"* 6mun* xnei *mrtrieig* {ilt*rs in níl surn{:
nsrrn&l ïr.*hrimxti*n sr*§surs §.* t* 4.Ë kg/.sr1 crn
{pres§}"}rs relie§ **n{r*§ v*lv* in th* sunr§;
*ii pre**ur* s*n*trr unit in the *ranlc,*x**
fitt*d in th* frmnt §:art *f th* crank.si:nft {14V - §SAi
eail-battery igni{icn with eiruhl* e*ntaet breaker
ancJ autorr:atic advan*e xrith a*ntrifugal ríxa$$e§
ignition advance (Íixee$) §*
autnmatrc advance ftSo
full *civance {f. * a") 3.,l
0"3ï +"0.43 rnm
§on*h W § »
L*elgc § |-{t*NY
*.§ mm
n. Ë iitt*e* *n ths frarnc
el*ttri* §t*rtsr {1§V - S.f KWi wit§ ele*tr*nïssrl§ti*
r*tshet **ntrmt ri*"lg qear balted *n the flywheei
§t§lrtsr butt*n {SïÀ§Aï} fitt*S *r'i thq §l§-{ side cf hans{eh*xr
twin driu*r'r pl&ts§, dry type
titte* nn tho flyrvh*ei side
hand rontrn§Nee$ by l*v*r un {eft handiebar
by gears, raticl 1 to 1.235 {Z- 17121)
S x5:**t$s, fr*nt*,i smsess§'ílsnt, cnnsiar"lt n'l«g$r seess.
Cush drivu' ir"lcorporateci
§)§*el s§)*rstsd *r"l tl"le t*/§'{ side *f the §ik*
fr {X * 1,§l§§}
1 .*§S {X * 'ïS,rtr§}
I .S4ï {l * Ë11§#}
§,§§§ {X * X§l§§}
§.?S§ {{ * ËSlà1i
by cardan shaït, trev*í gear set
1 1o 4.7'14 {Z : 7i33)
1 to 1 1.543
1 to 8.080
i to 6.095
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FRAME
§USPENSICN§
- front
* rear
WHEËL§
- front
- IUCII
TIRES
- front
_ róar
BRAKE§
- front
- rear
DrMËNSt*t,l§ ÀN\}il W§lffii-{ïs
- wheel base lloaded)
- max length
- max width
- max heigl'rt
- min. ground uï*aran*e
- dry weight abt
PERFORMAN§§§
- top speed
* Íuel consumptisn
- :rl surnp
- gËar Dox
- i?ar Jrive box
sevel gear set lubrieatl*n)
- í';r:i :ork ieach leg)
- ir;. k\aÍ a r^rriie
..^^- )^4 lorr\
eluplex *r§*§*, tubular strr"*cti*r*
t*l*scopi* f*rlc "M§ï§ GUfm Setsnt*
with *il sn*u{§*tis sh*ck absorhers
svringlnq f*rlc and r*ar r*mmper§ \.,{i{h aS,}us,tabl* extmrnsi
spi'inEs ssnËsntris t* the *i{ Bneumnfi* sh*ek ahsorbers
lighl xll*y *estinss with rirn*:
WM §là.1§ x 1§. *P*
Wf'4 §lX.1S x 1S" §Ft
1fifi/§0
1X fil§*
di*e §p* wlth **liper having 3 eylind*rs, *o*tr*llcd
by hand |ev*r *n the §l§ sidq ci the hancllebar
hyeir*r.r*l* trmnsrnissi*n indepenSent frcrn tNte rear brake:
cJise §ia. §*S r*rx
br'aking syliridsr dia. §§ r:trn
,ï'l&§tsr sylin*§r clia't§.ï rnrir
*isc ty§:* with fixeeJ c*liper witl"r two sylindsr§
foot *nntrclled with ssd*t **r the §ll"{ *ide of t}t* h*ke:
eJi** dim" *4à rnrn
brnking *ylineler *Jla" §S mrn
m**ter eylinc$*r din, 1§"§ï§ mnr
the r*ar brake is *onne*t*d by an hydraulic
{rarrsrnission tel a seeond brake on the front w}"reei
havíng the *nme featxres and sixs às ths hsfid
**ntn*iled frunt brak*
'ï"§0§ m
§.1§* rn
§.S4§ rn
'ï,1§0 m
S.1ï§ rn
§i)§ ks
230 kmlh (144 mph), solo
§.7 lx 100 km
3 ï tS"'114 qi"rmrts) *ii ",&§ip §lillT 2000 §A§ 10 Wl4§"
* ï§S i {1.§/4. p:intsi nii ",{§ip So{ra MP §A§ SS"
t).3§§ I {§ *e *bi} *il of which: 0"3§0 } i8 114 oz abt)
"Àsi§: §. 1 lï*tr* Mp §AË §§" amd 0"SË0 i 1314 ozt
"Àsi§: §oe*l ,E§tri$E" *r §,'ï*lik*te "4" ty§s
*.*§S I (3 *a *hti fluid "ÀsiË Àïlï ilexr*n"
fluirS -,À6ip ffir;rk* fluiel - Super l-{ffi"
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FU=L AND CIIL CAPACITI˧
-:;ei iank §§ §{§.1§ U§ gls} supergrade petrol (97/100 NO-§M)
rreS€rvÉ 3 I abcut) {§.X14 quarts}
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ENGINE OVËRHAULIN§ &N§ §I.N§*KIT,{§
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§YL§NM§ffi§
§§§-§§-r§§N §§ §y§-§Nm§§ m*&§§§ï§R
m§ïmN§
§ffir-§§Y§§{\t sF p§§Ytrf\* m§&M§r§§
G§iA§ll{§ *
82.968:82.974 mm j
l.ZA6,í ' 3.266$" i
*FïANIN§ §
St.§fd * §l.SS0 rnnt
§.?§§s -+- §"˧$§"
§NÀNIN,Jfi §
SË"S8n * &3.§§§ mrn
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G§lA§I}\JG AG§AStr*§ mGRAD|NG C
§§.0SS: §§"S*§ mrn
§"3§rr-* §.3§ï§" S§.SS§ -! §§.fl1§ rnr"n
§.Ë§ï§ *-3"§S§'tr '§*"§1Ë*§*.SJ§v'nm
AA^^{.À^^ór!,
"1.1 §öI-ó.loö4+
ïhe piston* *f an *nEi*e mu§{ bë ba}an**d; a
weight dlf{*ren** betw*en them alf .1.§ sr {s al*
iow*cJ.
When fittÍng a pist*n Ëhëck that th* class mark
starnped nn the pistnn and the word "§CA"
iexh*ust) are {acinq the exhaust hole in the cy-
iinder"
Ë ??.0§0 +22.00ó
N.§" * ïhe above sclection valuo* are valid for
th* rn*d*l &§S Le h,{ans ll starting lrcm
engine n. §CI3$(}"
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t-1*lu*s in mnr

CON.RODS
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Values in mm
CRANKSHAF:T
Crankpin diameter;
S*:i{l:FD PRODUCTI0N ËlN
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44 0C8
i Jzo - 44.020 mm
-:7331"
*^?§6 mrs I .SiS'
S3.ï§d * 4§.ïS§ rsrn
{ annr " i ?n^Aii
t I / /\ Y t / /-1t,
IJ$]D§§§1ͧ§ OF
i (5;i,hm; nr/'li ö,ïSë $m,'.$§*"
, +: SOC + 43.5'l? mm 43 246 -* 43.258 mn".
, : ïr^A .
i rIr20*17130" 17025*17030'' I
I 3§.*7§ + ï4§.S?§
I mu prrallelixm and mmplanxi§ |
i diíerrnw §nNwecn bst§ sxis moauurad i
at a distance ol ?ÍI0 mm " t),10
Ï3.§SS * §§"§§* *§,§§S-r 3§.§§S
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I lnrr rnrssru$ iH coo.nCItt
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§LUË ilOT
oil §ïEÍll
47.r30 - 47.13§
jLLAˤ - n -
lïfifït §sï
0il §ïïllt
47.136 * 47.14?
Vaiues in mm
ï0TAr. ïHtcl(llEss I
í5TËtL ; AHï1Ffl.) 1.535 - i.5.í{l
§{"À§§§§
Mair:shaft Ciarreter, timing side
}cCC,_CïlCr.J P['t u§§*n§lí§n *ir
I .: ïr .' 015;l'
3, 3l) ' J/ §3y Íïm
n.4ïS$ * 1.4ï§ï"
< 7 U- - -
{ i^_.
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n ) "-,s ' ln'7§"
37 775 * §ï.ï$§ mm
14872 j- 1.4S§§*
§,§ nm r .§*rls}"
{ "í { t\ - {; "4\u nrff
v LuuJ ,rrrir
37.959 rnm
'!..13.14" , 1 4/15 -" 14707"
."L___..-*-*_- l

l\lainshaft drameter', dnve sicie.
§ï§td§ÀËi) §í:r*sucïl*ti ilti\,1 il.Ë *rrn i .i)§ïS" {J§1il§{:1§tx§§ *§
ö.4 mrr r 015F4' §.§ *rsn I "$§*§f"
§§"§7§ * §*.§§§ rnm
§.§§4"§3 * §.'1à4§. S§.fï§ * §*.ï§1 rnm Ë.1 ï SS -& §.§ 1S§" 5iJ.)1U - 53.55,] n'Irn §.x*s§ -*- *.1s*§" §§.§ï§ * §§.§§§ mm
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§§§SK§T{§ §NÀNK§HAFï BALANCING
ïo hmlmnne s{atieally the crankshaft it is neces-
sery tCI mdcl m weigtrt öÍ 1.650 * 1.652 kg.
§§tm §i-§À§À!{§§
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