I am working on a 2002 xr200r. I have removed the camshaft and there are teeth marks on it from pliers. While shopping for a replacement I have noticed that some websites have xr200r AC models and xr200r A models. Does anyone know what the differences are or if there are any differences? An example is in the link below. http://www.partzilla.com/parts/detail/honda/HP-14101-446-000.html Thanks in advance.