help on tank ID...

[revolucien]

Trying to ID this tank so I can order parts to replace or repair the petcocks. It is mounted on an xs 650 bike, but I believe it may be an xs400 or xs360. The brown color looks to be stock and there is a petcock on both sides. Any help you guys could give would be greatly appreciated.
Thanks,
Lucien

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[LuckyEight]

It should be a XS500 tank...

 

[revolucien]

LuckyEight,
That's great at least I know what bike it is now. Would you possibly know what year that is?

Thanks,
Lucien