I see 3 parts numbers and it refers to the engine serial number.
I have no idea what the difference is if any. Same bolts.... I used partzilla web site.
11340-MEM-305 = 2003 - 2004 S/C
11340-MEM-670 = 2003 - 2004 S/C
11340-MEM-671 = 2004 C to 2007 C/R/S
Improvements??? Different supplier???
General parts have a part number divided into 3 sections,
The first string of digits (1234-XXX-XXX) indicates the Honda function and component number for this part.
The second string of digits (XXXXX-456-XXX) is the product code, also known as Parts Classification Number in hondaspeak. This is the number that indicates the product (motorcycle) where this particular part was first used. The product code is probably the most interesting portion of the part number when trying to determine interchangeability of Honda parts between various models.
The third string of digits (XXXXX-XXX-789) is the Classification Number. It is mostly used to indicate various suppliers or improvements for the same part. Also any potential color code is tacked at the end of the classification number as digits (letters).
