DOes any 1 know of better tire for woods ,cross country riding that doesnt spin like a crispy cream donut on a greased hill while nearly killing the rider cause it couldnt get grip to get over the top of the hill?The other question is I have built motor ,Dave at east coast said to run Race gas at 108+octane I couldnt get cam 2 so I used some premium w yamalube synthetic.Is this safe to use in a pinch for a half of tankful etc?