hello,a friend of mine who knows in a triumph nut just gave me a set of pre unit engine cases the serial numbers are 5T-9106890 ..o.k. i do know that theyre speed twin and I THINK speed twin was from '37 to'39 and then '48 to58... my question is ..what year are these cases??? any body know???
thanks in advance
IF IT AINT BROKE ...DONT KEEP FIXING IT TILL IT IS..