Im having a problem making it up the coal hills by my house. My friends and i have come to a conclusion that the predator has to much spin in the back wheels. The Coal hills by my house are long , steep , and high up so everytime i try to make it up it i fly up the half of it then theres like 3 quad links left be4 i hit the top and my tire just start digging rutts and get stuck in the coal and keep spinning . Any Suggestions to fixing this problem because i can make it up the coal hills with my friends 300 ex and 400ex and we all have trouble getting my predator up the hills and the 250 ex hardly makes it up but gets up there and the raptor it makes it up but it does get stuck like the predator sometimes ..... any suggestions bc i need to get this fix bc we are going to some other place where the coal hills are like a straight drop down and very long going up and i need to get this fix so i dont get stuck and stall out.... thanks