I would like to know if anybody can tell me what date my bike is from? It is a Koga Miyata RoadRunner with an Alloy 7005 sticker under the saddle and the serial number is H8E06789. my problem is, the saddle bar is broken all the way around the weld on the bottom where it is welded to the part where the crankset goes in. I would like to know if I have one of the bikes that are guarantied for life. I appreciate any help you can give me.