Join Date: Aug 2008
Location: The Alps... the original ones!
I take your are referring to 2004-2005 MY bikes right? These came with both polished and black frames.
If I remember correctly earlier bikes, built in 2003-2004, had the polished frame, same as the 2002-2003 MY. Somewhere during 2004 Honda switched to a black painted frame, chiefly to save money (painting a frame is cheaper than polishing it).
Given bikes are built months in advance and Honda didn't officially introduce a 2005 MY for the SP2 (it was listed as the same as the 2004, at least here), we got an admixture of frame colors on the same MY.
Of course there's always the possibility the owner had the frame painted to cover dents and scratches, but that's easy to check: just get the frame number, go to a Honda dealer and they will tell you the original frame color.
Shame on me, my heart is black.