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TROUBLESHOOTING
strong spark, per
form
Step
7.
If
there is
no spark or
if
the spark
is
very
we
ak,
test
the
ignit
ion syste m
as
described
in
Chapter
Eleven
.
7.
Check cylinder co
mpressio
n
as
fo
llow s:
NOTE
Refer
10
Chapter Three/or sp
ark
p
lug
removal information.
a.
Remo
ve
and
ground the
s
park plug
shell
agai
nst
the cylinde r head cover.
39
CAUTION
To pre
vent damage
to
the
ign
ition
.'1)'5 -
tent,
ground
the
spark
plug when per-
forming the fill/owing s
teps.
h.
Place
yo ur finger
over the
spark
plug hole
.
c.
Operate the
start button. W
hen
the piston
co-
mes
up on the compression
stroke.
pressure in
the cy
linde
r
should be
felt coming from
the
spark
plu
g ho
le.
If so, the cy
linde r
probab
ly
bas suffi
ci
ent co
m pres
sion
to star
t
the engine.
NOTE
There
may
still
he
a compression
p
roblem even/hough
it
passes
th
e
pre-
vious
tes t. The
compression cann ot
be
tested
with a
ga
uge
all
this engine due
to
the
compress ion
releas e mecha-
nism
within/he camshaft
.
d
.
Insta ll
thc spark
plug
and cap.
Engine
Fail s
to St
art
(S p a r k Test )
Perform the following
spark test
to
determine if
the ignition
sy
stem
is
ope
rating properly.
CAUTION
Before
remo ving
the
spark
plugs
in
Step
I
, clean
all
dirt
and
debris
a
way
f
rom
the plug
base.
Dirt
that
fa
lls
into
the
cylin
der
will ca
use rapid engine
wem
:
I.
Refer to
C
hapte r
T
hree
and
disconnect
the spark
plug wire
and
remov
e thc
spark
plug
.
NOTE
A
spark
tester
is a
use/III tool /or
test-
ing
the
ignitio n
systems
sp ark
output.
Figure
8
sho ws
the
Motion Pro Igni-
tion
S
ystem
Tesl er
(p art
No.
08-(1 22) .
This too
l
is
inserted
ill
the
spark
p
lug
cap and
its base is
grounded against
the
cylinder
tread.
The
tool
s
air
gap
is
adjustable.
and
it allows
the
visual in-
spection
ofthe
spa rk
while testing
the
intensi ty of
the spark. This
to
ol
is
available
through most motorcycle
and
ATV dealerships.
2. Insen
the spar k
pl
ug
(Figure
9),
or
spark
teste
r
(Figure (0
),
into
its
cap
and
touch
the
spark
plug
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Table of Contents
Troubleshooting
