Hints On "Running-In" A New Motor Cycle; To Engage First Gear; To Move Off; To Change Gear (Up/Down) - BSA B31 Instruction Manual

slighlly
and
open
the twist-grip a small amounL
Depr€ss
the kickstarter
ped4l
until
comp.ession
is felt, nise
the
crhaust
valve
lifter
and
depress
the kickstarter
fredal
a
little more,
Release
the
valve
lifter. allow
the kickstarter
pedal to letum to
the
top of
its
stoke
aDd
then give it
a
vigorous kick downwards.
This starting procedwe should
alwaF
be adopted as
it
arllows the engine
to gather sumcient
momentum to over-
come the resistance
of
the next compression
stloke,
Nore that while
it
is
necessary
to
close the
ah
levea
when startiog from cold, this
should not be
necessary
when the engine is
walm.
During
normal ruoning th€
air
lever should
always
be kept fully
open, although
a slight gain
in
power at
low
speeds
on hills Eay
sometimes
be
obtaiDed
if
the
levet
is closed a very
small amount.
The ignition
lever should
be
fully
advanced
for
normal
running. It
may havc
to
be
retarded
slightly if
the
engine
is
under an inc.eased
load.
The rrtanipulation of this control
is
largely
a matter of experience.
'lo
engl|ge
Filst
Cear.
I)cprcss the clutch l€ver (i.e., declutch),
and move the
gcnr change trcdø,| pwards
to its limit.
ff
difficulty
is
cxpcrienccd when engaging
fiIst gear
when stationary,
rock
the
rnachine backwards and
forwards
mahtaining
slight
pressure on the gcar change pedal until
the gear is felt
to
cngage.
To
Molc
Ofr.
Open the throttle slightly
aDd
gently
release the clutch
lever. As the clutch
engages, open the
throttle a little
turther,
and when the
clutch
is
fully
engaged the machine
cao be
accelerated
to a
suitabte
road
speed,
ready for
ohanging
into
the
next gear.
To ChrIge
Gear
(Up).
Close
tho throttle,
disengage
the clutch and
prese
the
gea.
change
pedal downwards
to
its
limit, all
these
operatioN being p€rformed simultaneously.
Engage
the
clutch
and re-open the
throttle
together, immediately after
changinS. lvot?. Violent pressure on the gpar
chango
pedal is
neither ne.€ssary Dor desirable.
To Chstrg€
Gc{r (Dortr).
Open
the throtde
slightly,
disengage
the clutch
and
raise
the ge3r changs p€dal upwards
to
its limit,
all
these
operations being performed
simultdFously. Re.
cngage the clutch immediately.
Not?.-The
above moverDelts
zue
quito
easy
to
pedotn
aDd
a litde practise
lrill
ctEure
a lapid atrd quiet
gear
change, When charging
gear,
either
up
or
down,
it
i9
plgferable-aft€r
moving the
pedal-to
hold
it
mom€n-
tarily
itr position
with the
foot unril
after the
clutch
lever
has b€en released,
when the
gears will
b€
felt to
engage,
Do not
use
aD excessive
opening
of
the
tbrottlc
when starting, and
do not allow
the engine
to
racE when
st4tionary. Usc the tbrottle cootrol
to govem the
sp€ed
of
the
Eachire,
e,9.,
vhen
descending
a
steep
hi[, if
a
lowet gear
is
eDgaged
and the
tbrottle closed, the
engift
will contol
the
speed
of
descent. Oo very
geasy
ro4d0
the
use
of
the
enSine as
a
brake
ii
to
be
advocated,
particularly in
conjunction with
a change
to
a lower
geaL
It
is
never advisable, except
in
cases
of
emergercy,
eitåer to
accelecate
or to
btake fierc€ly; when thc roadi
are grcasy
both are extr€mely dangerous.
TIINTS
ON
'RTJNNING-IN
'
A
NEW MOTOR CYCLE
The
dder
who
has
just
purchased
a new machide
will
do well
to
remember that
all
the intemal
parts
are
just
as new as tho
enamel
atrd plating which can b€
se€q
aod that they must be well "run-in"
befoæ
the
eogioo
ca.a
be given aoy
really hard
wo*.
The "ruDning-in"
process is the
most important pcriod
in
the
life
of
the
engine,
and the
handling
it
rccsiv€s
dudng the
frst
1,000
to
1,500
miles will
determine tho
service
it will provide
in retum.
It
is
advisable not to
exceed
half
tbrottle
in any
gear.
Il
excessive speeds
aae
used there
is risk
of piston
seizuro
and other
troubles, and
in any ev€rt until
the &achine
has been
"ruo-io" it
caDnot be
expected
to give
its
b€€t
perfonnance.
In
particular,
avoid rapid
acc€leration,
cspecially when the
edgine
is
not
under
load
atrd
do not
l0
u