The connecting rods are made from hardended
and tempered steel, with a copper bush (1) fitted for matching with
the gudgeon pin (2).The floating gudgeon pins are secured by
two circlips (3) seated in specific grooves in the piston skirts.
PISTONS
The aluminium-silicon alloy pistons are
graded into three sizes; to ensure correct assembly, an arrow is stamped
on the crown to show the direction of rotation of the engine.The piston crown is concave and has four
notches to prevent interference with the valve heads.