Hey folks. Just booked track time for japfest 2 and now turning to look for a helmet... Got me mum to measure my head and came back with 65cm.. Looked on Demon Tweaks... All the XXL Helmets all stop at 64cm. Rang them and they said I can try any of them no problem... Did a bit more digging, and found endless amounts of motorbike helmets that go up to freaking 70cm... So my questions are: 1, What are the difference between Motorscycle and Motorsport Helmets...? In the Japfest 2 Guidlines it says: "An ACU/MSA approved crash helmet is compulsory" Does this rule out motorcycle helmets?? 2, Do you think a XXL 64cm helmet will fit me? It sucks being this big somtimes.. 6ft6 is a joke Any help or info on this would be cool!