There was a point I tried to spec an A8-A14 cams but found that you can spec an 5 A-12 cam and they all spec differently. When a cam is ground the the specs are dialed into the cam grinder as the cam is ground spec plated are also made. The spec plates insure that each cam is ground to the same specs. The problem is they than press the sprockets on they can be off as much as .003" which changes the cam profile. This is why they do not spec the same. You would need the specs off the plates so that you could properly dial in the cam. But the Chinese for some reason will not supply the specs . For instance when I had my cam ground I was given a spec sheet so that when I pressed on the sprocket I could check for accuracy using the degree wheel and dial indicator. Being just .002" on these small engine cams can drastically change the cams profile.
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