Installing The Cylinder - APRILIA RS4 125 Service Station Manual

Engine
•
Temporarily install the cylinder on the
piston, without the gasket of the cylin-
der's base.
•
Fit a dial gauge on the specific tool.
•
Take the piston to TDC.
•
Position the dial gauge on one side of
the cylinder and fasten it in order to de-
tect the zero position correctly.
Specific tooling
AP8140266 Dial gauge mounting
•
Move the dial gauge diagonally and
measure the piston protrusion in rela-
tion to the reference surface.
•
Calculate the necessary thickness of
the gasket, selecting it based on the
values shown in the table below.

Installing the cylinder

•
Fit a new cylinder base gasket of the
chosen thickness.
•
Refit the cylinder as indicated in the
figure using the specific clamp tighten-
er tool.
NOTE
BEFORE FITTING THE CYLINDER, CAREFULLY BLOW
AIR INTO THE LUBRICATION DUCT AND LUBRICATE THE
CYLINDER LINER.
Specific tooling
020287Y tool for sealing ring fitting
ENG - 190
RS4 125