converted mine to a needle roller bearing with built in seal, chopped of the bit of the bronze bearing with the thrust face on it and used that,, or if loads of end float make a thicker one, have to grind the shaft a little , seems to work just fine, no cork washer and the srm belt drive modded to fit an alton , got good lights and no oil leaks so far,
the oil seal is only at one end of the needle bearing and seems to get enough oil, no machining of case to get bearing in, there is one thats a nice press fit and crankcase side used one without the seal and used old bearing to make thrust face as needle roller is slightly shorter so cut it on lathe and put a slight taper on it and pressed it in.
