I just bought a 2010 Polaris 600 IQr and I am going to be racing cross country this winter. With the cost of racing fuel, I am trying to cut costs where I can. I'm suppose to run a 110/91 mix and I've heard of some people running straight 93 pump on race sleds. Is that something I could do or will I burn up my engine? Another question would be what do I have to do to covert the sled so I can run on straight pump?