I bought a rear wheel for a 200 conversion on my 2001 nightrain but cant seem to find out what year it is 06 or 07. I called Harley and they said the part number is not always stamped on wheels, but the part numbers were different for 06 & 07 and they could not help me. What is the difference ( 06 & 07) and how can I tell? I already bought an 06 pulley I hope it will work if my wheel is an 07?