thc
spindle slightly
by means ofa
to@ny bar at C.
Slacken
ofr the hexagoD B on
the
left-hand
side of
the hub dren
screw
the
adjusters D in
or out as the case may
be, until
the
chain
tensioD is correct, with not
less than
i
in. total
up-and-do\rn
movement,
at the ceDtre of the
bottom run
of the
chain
*itlr the machine
oD its central stand.
so
that
the
rear
wheel is in its lowest
positiotr.
Resr Chain
Adiurboe[t
(Comp.
and
Swinging Arm
models). Uascrqw
the spindle
4
Fig.
8,
slightiy
with a
tomDy bar then slacken
ofr the hexagon ,4 oD the
left
hand
side
of the hub, Release
the locknuts C and søew
the
adjusters D
in
or out as the
case may be, until the
chain ten3ion
is correct, with not less
than I
I
in.
(Comp.
l
in.) total
up-and-down movemeDt at
the centre of the
bottom ru!
of ihe chaio.
To
allow
for any variation in
chain tensioD the
wheel
should be rotated by hand until
the
tightest
pointis
fouad,
with the wheel in
its
lowest
positiotr.
Front Brake Adiustmeot
The
lenSth
ofthe
brake cable can
be altered at its lower end
by means of a knurled thumbnut
on the cable stop,
(For
Gold Står Racing,
see HaDdlebar
lcvers,
page
57.)
Resr Brake Adiustment
Finger adjustment is
provided
at
the end
of brake rod.
Do not
set the blakes too closely, since,
particularly
in
tho case of the
front brake,
its
action may
be
too
power{ul.
Any friction
between
lining
and drum will obviously
impair the macbine's
pedomanc€.
In addition, if carded
to extremes, the heat may
melt the
grease
in the hubs
and
this may find its way to the
brak€
linhgs.
(For
lub cation
see
page
16.)
Centralising
(7in.
Brakes only). Slacken the nut
on thc
brake cover
plate,
thus loosening the fulcrum
pin
in its
slotted hole. Apply brake,
when
fulcrum
pin
will auto-
matically
c€ntralise the assembly, and
keeping lhc brake
on, finally lock
up the nut.
(See
also
page
19.)
Brrkc
Crm Spindlcs. Thesc
arc
lubricated
with oil scc
fugc
lli.
32
Sprking
Plugs.
The spdking
plug
is of
Sleat
importance
in satisfactory
engine
perfomalce,
and every
care should
be taken
to fit
the
correct
type when
replacements
arc
necessary.
There
is little 1o be
gained
by experimenting
with
different
plugs
as
the make and
twe fitted by
u$ as
official factory
equipment is best suited
to the rcquire-
ments
of the motor.
This is Champion
Type No. L10S
(competition models NA8.
Gold Stars, see
page
56).
Fis.14, The
spa*ing
plug
Remove
each sparking
plug
every 1,000
miles
(1,500
km.)
or so for
idspection. lf
the carbu.ation
system
is in
correct
adjustment
the sparking
plug
points
should
Emain clean
ahnost indefinitely.
An
ovel- ch
mixtwe
fiom
the carburetter
will, however,
cause
the fomation
of a sooty
deposit on the
points,
and,
later, on the
plug
end face
(!s
upper view, Fig.
14). If
thereforc
such a
deposit
is found, clean
it off carefully
and
check
your
carbuletter.
The continued
use of
leaded fuel
may also
evettually
produce
a
deposit on
the
plug-this
time of
a
geyish
colouf.
3l
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