4. Maintenance
USE AND MAINTENANCE MANUAL
CHAPTER 4
MAINTENANCE
4-Strokes - Edition 00 / 2022
113
4
7
8
9
10
c
c
d
d
1
A
B
– Recover the guides “7” of the camshaft bearings, taking
care not to drop them inside the engine.
– Connect a metal wire “8” to the timing chain to prevent it
from falling inside the engine, then pull it off the camshaft
sprockets and tie it to the frame using the metal wire;
– Remove camshafts “9” and “10” from the head.
Installation (XXF 450 / XEF450 versions)
– Check that the top dead centre notch (TDC) “A” on the
flywheel is aligned with the reference “B” on the left
crankcase cover. If not, align it by turning the crankshaft
counter-clockwise.
– Install the intake and exhaust camshafts in the head.
– Install the timing chain “1” on the sprockets of both
camshafts. Make sure that notches “c” of the exhaust
and intake camshafts are aligned with plane “d” of the
camshaft supports.
