APRILIA RSV4 Factory a-PRC 2009 Service Station Manual page 374

THERE ARE THREE TYPES OF PISTON MARKINGS ON

PISTON WITHOUT MARKING.

PISTON WITH MARKING "A" OR "B".

PISTON WITH MARKING "AW" OR "BW".

ACCORDING TO THE TYPE OF PISTON MARKING, SE-

LECT THE CORRESPONDING RING.

Preassemble the pistons on the workbench with

the connecting rod shank and the respective semi-

The pre-assembly procedure is identical for all four

pistons and must be done as follows:

with the piston crown parallel to the

workbench and the arrow (1) posi-

tioned from the side opposite of the

operator, fit the connecting rod shank

with the bevelling (2), on the hole of the

big end, on the right side.

Position the special tool on the crank-

Partially insert the connecting rod

shank - piston assembly in the corre-

sponding cylinder with the arrow (on

the piston) twisted 45°towards the ex-

When the connecting rod head is low,

and has exceed its lubricating jet, ro-

tate the connecting rod shank - piston

assembly with the arrow on the piston

crown towards the exhaust; the bevel-

RSV4 Factory a-PRC