Electrical is by FAR not my speciality so I'm hoping others will weigh in here but...I would think if the igniter was the sole culprit, the bike would turn over but not start.
I would first take off all the stuff you did to perform your "bypass" & get it back to stock. Since you are hearing a clicking sound I would think the starter relay is bad, which appears to be what you might have bypassed in the first place. Have you replaced this or eliminate it as the problem? Search the forum as I know there have been several threads on this.
While some igniters are interchangable most are not. For instance you could use one off a ZX9 B model, but the max. RPMs are lower than the ZX7s. So verify the P/N on your igniter with the one you are looking at purchasing, especially when buying off eBay.

I would first take off all the stuff you did to perform your "bypass" & get it back to stock. Since you are hearing a clicking sound I would think the starter relay is bad, which appears to be what you might have bypassed in the first place. Have you replaced this or eliminate it as the problem? Search the forum as I know there have been several threads on this.
While some igniters are interchangable most are not. For instance you could use one off a ZX9 B model, but the max. RPMs are lower than the ZX7s. So verify the P/N on your igniter with the one you are looking at purchasing, especially when buying off eBay.