I picked up a very used but nice running 650 and while looking at it late at night, I did not notice the hairline crack in the lower frame leg where the rear subframe is joined (actually two cracks).. I noticed it was fixed and painted but it is starting to crack again.. Anyone know what type of steel this is and what the best way to fix it is?? I think it was hit by the bumper of a car.. Previous owner told me it was knocked over in a parking lot and the resulting foot peg and handle bar damage is evident.. He didn't say anything about the frame repair. Please help as I plan to fix ASAP. Anyone know a good welder in Central Coast???