my quad is pulling very hard to the left sometimes it is good and then it just pulls. I jaked it up and the brake is not stuck but the left wheel is not free wheeling when in 2wd or nutral when i run it in 2wd on the jake the left wheel is turning with the back wons. It is not drive able it pulls so hard. please give me some of your thoughts it is a1996 polaris 300 4x4 just bought road it about 10hrs.