Valves And Valve Guides Check - APRILIA MXV 450 Service Station Manual

MXV 450
•
Use an internal micrometer to measure
the rocker inside diameter and replace
the lever if necessary.
Characteristic
Rocker inside diameter - maximum limit:
12.04 mm (0.4740 in)
•
Check that the outside diameter of the
rocker shaft does not show blue col-
ouring, cracks or scratches; otherwise,
replace the component.
•
Use a micrometer to measure the rock-
er shaft outside diameter and replace
the component if necessary.
Characteristic
Rocker shaft outside diameter: maximum limit
11.96 mm (0.4708 in)
•
Calculate the rocker - rocker shaft clearance.
NOTE
CALCULATE THE CLEARANCE SUBTRACTING THE OUTSIDE DIAMETER OF THE ROCKER
SHAFT FROM THE INSIDE DIAMETER OF THE ROCKER
•
Replace the component if the calculated clearance value exceeds the limit value indicated
in the table.
Characteristic
Rocker - rocker shaft clearance: maximum limit
0.08 mm (0.0031 in)
BUCKET TAPPETS CHECK
Characteristic
Bucket tappets diameter - maximum limit:
25.96 mm (1.022 in)
Bucket tappet seating diameter on head - maximum limit:
26.04 mm (1.025 in)
Valve check

VALVES AND VALVE GUIDES CHECK

NOTE
THE FOLLOWING PROCEDURE APPLIES TO ALL VALVES AND VALVE GUIDES.
Engine
ENG - 109