The pistons were also made of aluminium alloy and had floating gudgeon pins.

At the same time, the connecting rods were changed from clamped little ends to fully floating gudgeon pins.

Fully floating gudgeon pins of hardened nickel-chrome steel.

Also of note, the pistons were changed to accept a 20 mm fully floating gudgeon pin unlike the 18 mm pressed-in pins of the earlier versions.

BB Piston crown oil spray system, fully floating gudgeon pins and BB modified internal cooling system.