ROTAX 125 MAX evo, Junior MAX evo, Mini MAX evo, Micro MAX evo
Fit thrust washer (pos. 13) and hex. nut (pos. 14) and tighten nut to 60 Nm / 530
in.lb.
Remove fixation tool.
5. Changing or renewal of the chain sprocket on the clutch drum
See Fig. 4. The chain sprocket (pos. 2) is attached to the clutch drum (pos. 4) with a hex. nut (pos.
5) and torque is transmitted by a needle pin (pos. 3) (see fig. 4). The proper changing or renewal of
the chain sprocket is only feasible, when using the appropriate fixture (pos. 1, part no. 277364). To
change or renew the chain sprocket proceed as follows:
Note: The fixture is furnished on one side with a centering pin for the chain sprocket with
11 teeth (17 mm diameter) and on the other side with a centering pin for the chain
sprocket with 12, 13 and 14 teeth (19 mm diameter / 0.75 in).
Note: On the chain sprocket with 11 teeth, the plain
bearing must be pressed out first (the plain
bearing must be renewed after pressing out).
Clamp fixture (pos. 1) for the chain sprocket in
a vice.
Place the clutch drum with chain sprocket
on the respective centering pin so that the
clutch drum is secured by the fixation pin.
Fig. 4
Remove the hex. nut (pos. 5) from the chain sprocket.
Clean all remains of the securing agent from the components.
Degrease the chain sprocket, the clutch hub and the hex. nut.
Place the new chain sprocket or the chain sprocket with required number of teeth
on the respective centering pin of the fixture.
Place the needle pin (pos. 3) into the relevant bore of the chain sprocket.
Apply LOCTITE 243 on the contact face of the chain sprocket and on hex. nut of
clutch drum.
Note: Fit the hex. nut (pos. 5) such that the machined face of the nut points towards the
clutch drum.
Attach the chain sprocket with the hex. nut (pos. 5) on the clutch drum.
Tightening torque 120 Nm / 89 lb ft.
Remove surplus securing agent.
Page 43/53
Edition 07/2016
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