APRILIA TUONO V4 R 2010 Service Station Manual page 281

TUONO V4 R
•
Remove the front head, slipping it off
the stud bolts.
•
Collect the gasket and the two dowel
pins.
•
Remove the chain tensioner complete
with O-ring using the specific tool.
•
If the O-ring is not on the chain ten-
sioner, make sure it was not left in the
crankcase seat.
REPLACE THE O RING UPON EACH REMOVAL.
Specific tooling
020883Y Tool for fitting/removing the timing
chain tensioner
Front head check
Check that:
•
The contact surfaces with the cover and the crankcase are not scored or damaged so they
jeopardise a perfect seal.
•
Check the status of the valve seats.
•
Check that the routing of the oil pipes is free and if required, clean them by blowing a jet of
compressed air.
Engine
ENG - 281