12
STEP
7:
Remove
the
3x23mm
cap-head
machine
screws
that
fasten
the
header
to
the
engine.
Carefully
remove
the
header
to
avoid
damaging
the
gasket.
To
s
ep
ar
at
e
th
e
en
gi
ne
f
ro
m
the
e
ng
in
e
mount,
remove
the
four
3x8mm
cap-head
machine
screws.
Rebuilding
the
Engine
STEP
1:
Remove
the
4mm
locknut
from
the
front
pipe
hanger.
Pull
the
pipe
from
the
rear
exhaust
header.
STEP
2:
Unplug
the
blue
wire
from
the
glow
plug.
Remove
the
fuel
line
from
the
carburetor
inlet
and
from
the
exhaust
header
pressure
fitting.
Disconnect
the
red
and
black
wires
from
the
EZ-Start
®
motor.
STEP
3:
Remove
the
EZ-Start
gearbox
by
removing
the
three
3x8mm
round-head
machine
screws.
STEP
4:
Use
a
2.5mm
hex
driver
to
remove
the
yellow
ground
wire
from
the
engine
mount.
Move
the
EZ-Start
wiring
harness
out
of
the
way.
STEP
5:
Use
a
2.5mm
hex
driver
to
remove
the
three
remaining
3x10mm
cap-head
machine
screws
from
the
engine
mount.
STEP
6:
Pull
the
engine
from
the
chassis.
Turn
the
engine
so
that
the
throttle
linkage
to
the
carburetor
will
come
out.
STEP
9:
Changing
the
piston
and
sleeve
assembly
Use
a
5/16
inch
nut
driver
to
remove
the
glow
plug
and
copper
gasket.
STEP
10:
Use
a
2.5mm
allen
wrench
to
remove
the
four
3x12mm
cap-head
screws
that
fasten
the
cylinder
head.
Rock
the
cylinder
head
gently
from
side
to
side
to
release
it
from
the
sleeve.
Note
the
thin
aluminum
head
gaskets.
We
recommend
that
you
replace
these
gaskets
with
new
ones
upon
reassembly.
STEP
11:
Remove
the
backplate
and
the
starter
shaft.
Replace
the
backplate
gasket
with
a
new
one
during
assembly.
STEP
12:
The
piston
and
sleeve
are
a
matched
set.
When
the
piston
and
sleeve
are
disassembled,
they
must
be
reassembled
in
the
same
orientation.
Use
a
hobby
knife
to
scratch
a
mark
to
indicate
the
location
of
the
piston
in
relation
to
the
pinning
of
the
sleeve.
STEP
8:
Removing
the
carburetor
is
not
necessary
to
rebuild
the
engine,
unless
you
intend
to
replace
the
internal
bearings
of
the
engine.
Remove
the
carburetor
by
loosening
the
3mm
locknut
and
pulling
the
carburetor
straight
up.
Содержание Nitro Stampede
Страница 1: ...OPERATING INSTRUCTIONS COVERS MODEL 4109 KC0532 R01 Part 4199X Rev 090731...
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