thanks for your condolences casper, after much inspection and soul searching i think i may have 2 seperate problems here. what ithought was valve contact at 7 looks to be a manufacturing mark, and the torn up bearings and crank look like foreign metal, thinking back i don't remember cleaning out the oil passages in the crank when i got it back from the machine shop, those bearings could have been damaged at first startup after the rebuild. anyway spare crank looks ok, clean it, new bearings and away i go again