Charleston Custom Cycle

NOS parts for Harley-Davidson and Harley/Aermacchi motorcycles

How to read your American Serial Number


All American lighweight models use the old ID numbering system.

The serial number will be stamped into the crankcase, and will use the following format:

  XX         YY                ZZZZZ     
  ^          ^                    ^
YEAR     MODEL      INDIVIDUAL ID #


For example, if the serial number is 55B2655, then the motorcycle is a 1955 Model B (Hummer) and 2655 is its individual ID number.


To see more about what your serial number reveals, click here.



Charleston Custom Cycle
211 Washington Avenue
Charleston, Illinois  61920

217-345-2577