Hello I have a 73 ts 250 that is running great. I just had it rebored and installed a new wiseco piston and rings. It now starts on about half a kick. The problem I´m having is it´s blowing smoke (white) and i notice it´s blowing some spots of oil on my rear fender and tire. The bike was doing this before I did the rebore also. Thought it was time for new piston and rings. I took it out and run it for 12 miles with no sign of letup. At a loss. any ideas?