It would be nice to have "current part numbers"...
I find it very difficult to order many parts from out of date fiches, and receive parts (especially bearings) with different part numbers that all look similar.
As I said, you don't need current part numbers.
A part is superseded when either a) a modification has been made -for technical or quality reasons- or b) the original part is no longer available and a substitute is offered.
case A) is, for example, fork seals. Original ones had one single lip. New ones have two lips. The seals are different between them, and therefore, the part numbers should be different, but the latter one is an improvement. If you order the part number of a single-lip seal, you will be sold a double-lip seal, totally compatible.
case B) is the handlebar switch. First ones had the knob in red -if memory serves me-. Latter ones had the knob in black, but the switch performs the same, it is just a cosmetic variation. The part number is changed but the new part is perfectly compatible, unless you are a purist restorer and want your handlebar switch with the red knob.
