wow when i saw you were the last reply to this thread I was certain it was going to be a "ah nothing a welder and a hacksaw can't do", if you say its not worth attempting its probably REALLY not worth attempting

the 1st and 2nd gen motors are different, but I think totally based off the same basic design, so it would be like swapping a B16A1 obi for a B16A3 obii(i just made that up from some letters and #'s in my head, not sure if those are real examples), an upgrade but just a case of bolt these parts directly into this bike, not a real serious motor swap