How much of the head-pipes from the headers are left? I made this one using parts cut from an aftermarket Kawasaki 550 header, along the larger tubing recycled from a White Bros XR 500 exhaust. Once you merge each pair of head-pipes together, it gets easier with only one pipe on each side. You can buy mandrel bent u-bends and cut and fit sections together to the shape you want. I suggest buying more than you think you need. 
theres just a small pile of bits left plus the "4 into 1" that was welded together ( without a jig ) which without major surgery will never fit onto the head. the plan was to have the header from cylinder 4 go straight across the front of the other 3 cylinders and have a stub join into it and then it would turn round the cylinders at the left end and head back to a muffler at the rear of the bike.
could be a plan for the future but for the moment it's a delkevic set of headers with an angled joiner pipe into a supertrapp muffler to lift it as high as i can
