Checking The Chain Tensioner; Checking The Chain; Cylinder-Piston Assembly - APRILIA RS4 125 Service Station Manual

Engine

Checking the chain tensioner

CHAIN TENSIONER
•
Remove the central screw with the
washer and the tensioner spring.
Check that the one-way mechanism is
not worn.
•
Check the condition of the tensioner
spring.
•
If signs of wear are found, replace the
whole assembly.

Checking the chain

•
Check that the guide slider and the ten-
sioner pad are not excessively worn.
•
Check that the chain assembly, the
camshaft driving pulleys and the
sprocket wheel are not worn.
•
Replace the parts if signs of wear are
found.

Cylinder-piston assembly

ENG - 184
RS4 125