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The camshafts.

All 750cc engines which have 68mm bore, the valve lift height is 7.60mm for INtake and 7.45mm for EXhaust.
The valve timings are

  IN open BTDC IN close ABDC EX open BBDC EX close ATDC Overlap
1FM 33 63 63 33 66
2LM/2AK 32 52 59 29 62
3KS/3XF 33 63 59 29 62

There are 2 types for each of the intake and exhaust cams.
The one for 1FM must be the set for the highest top end power supposdly going by the exhaust cam timing and biggest overlap.
The cams for 1000cc or 72mm bore should have the different phase pattern or to large a lift which 1FM's head can't be adapted to. So basicvally you haver to choose the camshafts from the above list of 2 INtakes and 2 EXhausts.
The phase pattern means the distortion of the 3 intake cams for adopting the difference of the intake valve angles between the center and the sides. There is 3 degrees difference between 1FM's one and 2GH's. The difference must cause the malfunction and may make pistons and valves run. For OW01 may be same.
He had made a test for the 912cc engine with 2GH's IN cam and 2AK's EX cam. In the result, he found that the STD INtake cam is the best. For EX, STD is the best too, Although, if you want an engine to perform in higher end of the rev range then the 5 degrees delayed may be considerable. He said another combinations were No good because the performance in lower and middle range came to be so poor.
His current settings is the set of STD IN and EX and he set up them as INlet is delayed slightly and EXhaust is advanced slightly.

4JD(YZF750SP) INtake camshaft is really interesting. It has the different phase of 0.75 deg from 1FM. Its timings are BTDC37deg in open and ABDC67 in close. The lift is not confirmed but it seems unlikely to be usefull for 1FN engine.