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Rotax Max 125cc Run-in PDF  | Print |  E-mail
Written by Vic R   

ITEM

Rotax Max

Fuel
Premium Unleaded
Oil
Synthetic
Fuel/Oil ration
40:1
Air Mixture
Jet – 168 (change depending on conditions) See Jet Chart


Tyre pressures (cold – in shade)
12.5 PSI
Front wheel spacers
20mm each side
Front wheel nut tension
Should be able to turn spacers with fingers
Camber
+2 mm
Wheel Alignment
+1 mm out
Rear Wheels
1385 mm
Chain Tension
15mm Slack
Water Temperature
Max 10,000 RPM until engine water temperature is greater than 45C.  Ideal temp 55C. Max Temp 75C
Run in procedure

1st Session of 10 minutes
5,000 – 7,000 RPM
2nd Session of 10 minutes
5,500 – 9, 00 RPM
3rd Session of 10 minutes
6,000 – 11,000 RPM
Maximum recommened RPM after run-in.
13,800

Continually change the revs over the range specified in the table above.  This should be done under full load.  For example – a Rotax should continuoully be accelerated from 5,000 to 7,000 revs during the first session.

Allow the engine to rest and cool for 5 – 10 minutes between each session.

Check all nut and bolt tension at the end of run-in

During the run-in period, excess fuel may accumulate in the air intake airbox.  Smoke will also be seen from the exhaust.  This is normal when engines are run at low revs.  The spark plug may foul due to excess oil in the engine.  Change plug if engine does not start.

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