Fuel Cap for XS400S

[Peter Y]

So I have been looking for a XS400SJ/XS400SG fuel caps because they are different than XS400. Through my research, I came to a realization that XS650S fuel caps fit the XS400S. I have found one on Ebay, but I believe they have the OEM# wrong. The OEM# they have specified is for a small rubber cap that belongs on a starter motor. Will you guys confirm this?
http://www.ebay.ca/itm/KR-Tankdecke...128333?hash=item23801b4d8d:g:anoAAOSw4YdYyS4c

 

[Noodles]

Gas cap for all "specials" will fit, "standards" will not. From my understanding. I need one also for my 1981 xs400sh. Mikes XS has em' in stock, ships from Florida. $33.00 though.. you can get em' elsewhere too...