EIO-LCA Web Forum

I was wondering if there was any more in depth information about the motorcycle-bicycle GHG/ EIO-LCA. I am trying to get the bicycle information, specifically and was wondering why two items that seem substantially different in weight would be estimated together. Is there any assumption used in the calculation that deals with the weight of motor- vs. bi-cycles and/or is there a reliable way that anyone knows of to derive a reliable estimate for bicycles only from the joint motorcycle/ bicycle results?