I am getting 2 Honda SL125s back into action, and am wondering- will the 1-piece Honda 100 (SL,CL,CB) work on the 125? It looks like the combustion chamber is the same size (the 100 piston is domed to keep the same compression as the 125, in what appears to be the same designed head). The valves also seem the same. The trouble is- i see different part numbers between heads when i look them up. Has anyone tried the 100 head on 125? This can help solve a lot of ´loose cam´ woes, since the 100 head would work also! Thanks Bob