Motobecane 40 - Page 27

DECARBONIZING
THE ENGINE
Remove
the
exhaust
(See
page
24).
Remove
left
and
right
hand
covers.
Remove
the suppressor
c3p.
I
Disconnect
the
decompressor
cable
using
a
screwdriver.
Loosen
but
do not
remove
cylinder
head
nuts.
Loosen
the
upper
engine
mounting
nut.
Drive
out
the
upper engine
mounting
axle as
far
as the first
spacer
only.
Tilt
the engine
and
remove
it from
the
axle.
Disconnect
the
wires
at the
terminals
behind
the flywheel
magneto
stator
plate
and slide
them
through
the
guide
spring.
-
Place
a
block
under
the engine
to
prevent
the lower mounting
flexible
bush-
ing
from
being
damaged.
Remove the
cylinder
head
nuts
using
a
l0nrm socket,
Remove
the
cylinder
head
and
the
gasket.
NEVER
USE HARDENED
TOOLS
THAT
WILL
SCRATCH
OR
NICK THE
COMBUSTION
CHAMBER
AND PISTON
DOME.
Bring
piston
to T.D.C.
Scrape
the
carbon deposits
from
the ex-
haust
port (fig.
l.).
A'lways fit
a
new
cylinder,
head,
and ex-
haust
gasket.
REASSEMBLING
AND REINSTALLING
THE
ENGINE:
See
pages
8, 9,
15, 16,
22.
Fig.
1
R0
23
www.butkus.org/information