P Parker Member Mar 7, 2011 #1 I am putting a 1979 rotax 503 fan cooled engine in a go kart for summertime use and I'm wondering what the correct jetting would be? Much leaner I would assume, but how much? Temperature to be around 70-80 degrees.
I am putting a 1979 rotax 503 fan cooled engine in a go kart for summertime use and I'm wondering what the correct jetting would be? Much leaner I would assume, but how much? Temperature to be around 70-80 degrees.