Triumph TR4 - RUNNING ADJUSTMENTS - JET CENTRALISATION; Jet and Air Valve Alignment Procedure

RUNNING
ADJUSTMENTS
t ig.
49
Jet
Centralisation
tfficient
operaliorl
,\l
lhe
c'fburellor
dcPcnJs
Ltf\on
J
ireel\
n\o\in('xir
\al\e xnJ
il
corrcctl)
centreLl
needle
|.l.l^
Ihe
iet
oiiriue. lhe
uir
rrrlre
rrray be
checled
lor
lrecdom
b\
lrllrng
ifr"
r.ii'"
"i,ft
thc
.pring
lirrderl pin
{9'
A
!al\c lailrng
to
i.lt
ir.el,
inoicnLc'
a itic[ing
ral'e
or an
L]ll-centrcd
jel'
rnd
or,
rhc
nec.lie
(l0t
iuuling
thc
let
orilice
Rcrtif)
b)
remo\rng
urr'l
cleuning
thc
r.rlre anJ
bore
tn prtrlhn'
or
b\ re-centrJll\lng
thc
needle
in
the
jet.
\Otf
:
Wherl
requi|ed.
the
jet necdlc
nlu\l
bc
rencued
b\
-o^
t"rtinc
thc'
satlre
cod(
nrlnlner'
I hc :houldcr
ol
thr'
n".af"
n,ui
bc
httcJ
llu\h
\\ilh Ihc
lo\\cr
fucc
ctl
the rrir
valvc.
Procedure
l.
Litl the
air
vaLve
(18)
and
fully tighten
the
jet
asscmbly
(l2l
L
Screw
up
thc orifice.rdiuster
unlil
the
top
of
the orilicc
(19)
is
iust
aLove
thc
bridge
(28)'
3.
Slackcn
off
thc
iet
asscn.rbl-v
(12)
aPProximately
one
hali
turn
to release
ti-re
orifice
bush
(21)'
4.
Allow
the
ai|
valve
(18)
to
lblli
the
needle
uill then
onter
thc
orifice
and
thus
centralise
it'
5.
Slo!tl\
tiRhlcn
lhe
a.scrrrbl)
{llr'
chccking
lrequently
thr't
rhe
niedli
remains
frec
in
the orificc
Check
b)
rul'rrlg
lne
dir
\al\e uppro\imatel)
;
und
allo$ing-it.
ro lirll
lreel)
The
piston
ihould
then'stoP
firmly
on the
bridgc'
6.
Re-set
thc engine
idling.
Fis.50
36