How much white smoke are you talking about? If the white smoke is constant and coming directly out the exhaust, you possibly have water mixed in with your oil. You need to check the dipstick and see if the oil looks like chacolate mike. If so you there can be a few reasons why that can occur. It can anything from a broken head gasket seal, to a warped head. If your bike is running hotter than usual you need to definately have that checked out. But it sounds like the smoke is coming form underneath your bike. There is a drain line coming out your radiator plastic over flow tank that runs along side your bike. You might just have a bit of overflow running out of the tank.