first i would like to say hi to all . my problem is that i have a 1998 vulcan classic 1500 and lately it's been getting a realy loud whinning sound when the bike is going over 20 mph and you let go of the gas .if you put the clutch in it's not as loud but still loud and if you put it in neutral it goes away . i changed the clutch and no help. the oil in the bike is new and the oil for the shaft drive is new . any one have this problem or knows what it could be? thanks in advance.