Hi Stephen,
We are running our bikes with full specs using unleaded fuel 105 or 115.
I am used to deal with www.racingfuel.es
They have Sunoco fuels with some interesting offers. Usually I bought to them the fuel delivering the tanks to the nearest courier office to the circuit. Only reason for that is to save some space during our transport!
If you need some support with them, just let me know
Regards, Deltona
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Two Strokes forever!