Thanks to all the guys that helped me make up my mind on buying an ATV.
It's a 2011 Can-Am DS 90. I measured about 15 times and it just goes inbetween the 2 GTO's If anyone can help I'm looking for a 4X open faced helmet. The 3X is to tight. I'm not going to buy my ATV until I find something that fits. I got a 4X from the States and it fits my son ughhh