I have an 2002 Eton 90 thunder the drive belt the dealer sent me is 1/2" smaller but he insist it is the right one my old one is 31.750" around new one 31.250" can anyone tell me how big a new belt measures /Feb4/04 dealer has called to tell me his supplier had sent him the wrong belts and he is sending me 2 new ones no charge with a big i'm sorry attached