I have a 98 Trailboss 250 and it acts like the brakes are on when going forward. I blocked up the back and the bike was in neutral and when I turn the wheels forward it feels like the brakes are on, it gets very hard to turn over. When I turn the wheels backwards there is some resistance but nothing compared to forward. I checked to make sure the rear brake was loose and not hanging up and the chain seem to be adjusted about right. ANy ideas? Thanks.