APRILIA MXV 450 - Specific Tooling

CHECK THAT THE CAMSHAFT IS FREE, NOT RESTING ON
THE BUCKET TAPPETS.
•
Release the front camshaft and the
crankshaft from the locking pins.
•
Undo and remove the timing slot
screw.
•
Tighten the screw in the timing hole.
SCREAMER TIMING
IF THE ENGINE IS TO BE TIMED WITH THE Screamer METHOD, IT IS COMPULSORY TO CHECK
WITH AXONE IF THE CONTROL UNIT IS MAPPED WITH THE SAME METHOD SO AS TO AVOID
ANY MALFUNCTION.
•
Preassemble chains, chain guide slid-
ers and chain tensioner and release
the free camshaft gears (fitted on not
keyed taper seats)
•
Remove the timing hole screw from its
seat.
•
Place the crankshaft lock (timing pin) in
its position.
Specific tooling
9100844 Crankshaft locking tool (timing pin)
•
Working on the main transmission nut,
make the crankshaft turn until the front
cylinder reaches the TDC in combus-
tion phase.
•
Insert the pin in the crankshaft lock
(timing pin) in order to block crankshaft
rotation.
NOTE
THE SPECIAL TOOL IS ONLY USED FOR IDENTIFYING
THE CORRECT CRANKSHAFT POSITION.
DO NOT USE IT FOR TIGHTENING OPERATIONS.
•
Make the timing shaft turn so that the timing shaft hole matches the head holes.
•
Position the pin so as to lock the front cylinder timing cam.
MXV 450 Engine
ENG - 123