I currently just purchased a pop up vented flush mount gas cap which I installed on the right side of my tank. Since I installed the new HD speedo/tach which includes a gas gauge, I do not have a need for the big stock gas cap on the left side. I'm looking for a matching pop up cap that would install on the left side of the tank similar to the one I have on the right. It looks like the threads are different on the left than they are on the right. Any advice would be appreciated.

Here's the one I just installed:

http://www.jpcycles.com/product/7200730

 

http://www.ebay.com/itm/Drag-Special...41dce5&vxp=mtr

This should do the trick. There is a set that comes with both for an exact match but I cant find the set right now. This is what I went with and it worked out good.