Do you carry a range of plugs for the hot down to the cold temp range ? If not best you do . As far as jetting goes the cheap alternative is Dartford Kartings Aptare jet calculator , although a weather station will be required also unless you do what the next paragraph says . As a new starter to Rotax check the temp and barometric pressure on-line where you are going and jet your carb to match these conditions , it wont be perfect but it will be a good starting point for the day . Never run less than 50:1 in fact 45:1 fully synthetic , preferably coloured as well so you can never make the mistake of unmixed fuel , would mean lubrication wont be an issue !
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