Malossi 3118213 Manual De Instrucciones página 11

the cylinder stud with the smaller
diameter in line with the exhaust.
Then, assemble all the other
components following the order
described below.
1) Assembling the piston
Take the piston and insert a
gudgeon pin circlip into one of the
two piston recesses and then insert
the gudgeon pin provided in the
kit into the opposite side. Place
the piston on the connecting rod
with the opening or openings of
the piston skirt facing the rear
transfer ports of the cylinder, or
with the arrow drawn on the piston
crown facing the exhaust.
Gently push the gudgeon pin
through the bearing and then,
using a tommy bar, keep pushing
it until it rests against the gudgeon
pin fitted earlier, applying just the
right amount of pressure with the
palm of your hand.
Then fit the second gudgeon pin
circlip properly into the other
piston recess, gently easing it into
position. Important: Please, ensure
both circlips are seated correctly.
2) Inserting the cylinder and
aligning the piston
Fit the base gasket and insert
the piston without rings into the
cylinder. Push it down to the
crankcase making sure that it goes
right in without any friction, leaving
a minimum of play in its crankcase
housing. If there is any friction look
for the causes of resistance and
remedy them. Then secure the
cylinder to the crankcase using the
relative nuts, inserting spacers in
place of the head. Turn the engine
over by hand a few times to see
whether the piston is well aligned
11
in the cylinder, checking with a
feeler gauge on the gudgeon pin
axis whether there is a diff erence in
the gap between the cylinder liner
and the piston on the two opposite
sides.
If the top part of the piston tends
always to rest on one side of
the cylinder, remove the latter
and check that the engine half
casings on the bottom of the
cylinder do not have any dents
or gasket residues on them, or
that they are not misaligned, i.e.
they create a step preventing the
cylinder from sitting correctly. If
the performed checks rule out the
possibility of imperfections in the
bottom of the cylinder it means
that the connecting rod is bent.
If you do not wish to replace it,
we recommend to insert a pin
in the hole and lever it slightly to
straighten the rod.