I was out this weekend and the 02 650 ran great but I now have this strange snapping or a popping noise,not in the engine if i stand on the running boards and bounce this noise sounds like its coming just infront of the rear tires or if i am riding over bumps or ruts and the bike twists then the noise appears again what could it be???? Bearings ,shock,frame, any help would be greatful,also i was riding a freinds vinson and was doing 56km/hr side by side and my 650 was showing 47km does any one have a speedo thats out that much,could it be my outlaw tires that make that much of a difference.