I was asked today how well a Honda CX500 Standard/Deluxe/Shadow tank fits on a CX650E Eurosport frame; I assume that the same applies to the CX500E Sports, GL500 and GL650 as they share similar frames. The blue tank is the CX500 tank, the off-white is the 650 tank for comparison. Looking for a Deluxe/Standard/Shadow tank? Check out eBay US or eBay AU.
You can see more of the neck of the frame with the CX500 tank:
The rear mounting hole lines up neatly, however:
The mounting points on the tank which grab the rubber bumpers are farther apart on the CX500 tank, so if you were to do this I think that adding some material to stop it from shifting from side to side would be advisable… or as Murray has pointed out, you can use the rubbers from a different bike – check them out on eBay. Pics with stock rubbers:
The line down the bike is definitely different – it looks as though it would expose more of the top of the motor:
Hope that helps! And thanks Murray for the CB900 fuel tank rubber mounts tip… just ignore the search results which bring up the rubber mount used for the rear of the tank!