Because when I try to order parts I get all sorts of conflicting responses.
Mine is a DT125R 2002 DE03. The engine says 3BN03. Cylinder diameter is supposedly 56.40 mm for "early models (3DB1)" and 56.00 mm "later models (3RN1 onward).
But when I search for those numbers, I get everything from "1988-2001" to "1991-1999" to whatever. Not to mention the differences between the DE03 and others.
There does not seem to be any resource online listing the variants with their various idiosyncracies, so this ought to be the proper place to do it.
Shall we write up a list and pin it at the top here somewhere?