the H-D part # and sizing is correct that you listed. part # coincides with 65/27 toothed pulley combo....long swingarm.
there is no "updated" or "superseded" part #. fits: X, XT,SS, STT, XP models. falcon-goodyear also make excellent belt. price shop. retail as i recall was around $149
G0500.1ATB----- Drive Belt, 2009-2010 1125CR Only----does NOT fit R model.
can tell how much you appreciate me digging up the correct part numbers. you're welcome