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Checking individual parts
450 SEF-R
❱❘ Checking the freewheel sprocket
bearinge
• Visually check the needle bearing of the
freewheel sprocket.
• Change it if necessary.
• Check the visual aspect of the rolling raceway
of the freewheel sprocket (1).
• Change the pinion if necessary.
• Check the visual aspect of the freewheel, its
clearance with your hand, as well as its capacity to
freely rotate.
• Replace it if necessary; remove the outer
securing clip (2) and remove the freewheel.
WARNING
Replacing the freewheel systematically involves
replacing the freewheel sprocket and vice versa.
❱❘ Changing the crankshaft bearings
• Change the corresponding bearings (outer rings)
on the central crankcases.
• Pull out the distribution drive pinions with a
2-arm puller.
• Retrieve the inner rings of the crankshaft
bearings by heating the R464 tool and the ring.
WARNING
The radial clearance of the bearings must be
practically zero.
• To remove the drive pinion of the balancer shaft,
tighten 2 screws 8 x 125 in the holes provided for
this purpose.
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