I would give them a call as I think for initial break-in you may have to use a not so good an oil to enable the parts to bed-in properly , I may be mistaken so please call them to verify . Do you intend to do much of the maintenance work yourself ? I only ask as you said that you left Rotax as too expensive , but if an engine builder does it all for you every time then it will probably be no cheaper than your Rotax was if you intend to keep them in their very best tip top condition . I would suggest doing your own valve spring changes, oil changes, even valve grinding ( If your feeling adventerous then glaze bust and re-ring yourself ) if your mechanical knowledge will allow . Also remember that you only have around 11-12hp now not the 28-30 that you used to have so it will seem a lot slower but the racing will be closer and your driving will need to be smooth to maximise corner speed . Remenber anytime lost going sideways is less time spent going foward ...
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