The frame number is C100 DO 87563, the engine is C100E 14621. The engine in it now is C100E 364982. All the internal parts interchange, the cases are very different as far as the baffles go. The old one doesn't have the baffle chambers and the required case gasket is different. Wire looms for many Hondas, were used for several different years in a row, with the same year tag. I know this because I used to work in a Honda shop as a mechanic in the 60s. The bike was in the boneyard of the shop when I returned back to work, after a stint in the Army. This was in 1971 and have owned it ever since. I used a make shift baffle out of the dip stick, drilling a hole in the top with washers on the stem, to try and separate the oil, didn't work well. E Bay Japan? I'll try that, hope it's in English. Thanks