It's been a while since I last looked for it, but if I recall correctly there's more distance between the chain and the housing on the inside, I know it was for sure on that particular motor, but I haven't checked several since to definitively verify. On an earlier build I actually had the chain snap when the master link clipped the clutch cover - hurt like the ****ens when it whipped into my backside at 35+. Since then, I've always put the master link on the inside of the chain (on the side of the pedal chain), and it's been solid since.
On a different build I had a POP at what seemed to be the masterlink every full chain rotation when I was accelerating at very low (near idle) speeds. I played with the chain tension and I got the same results with under tight and over tight, I went through and remounted the sprocket thinking initially that it was just an offset driven sprocket, but even after I remounted it at dead center the popping remained. What worked for me was just moving the C-clip to the inside of the chain, but of course, every build is different. Depending on the frame and how your chain tensioner is angled to the chain, it may not solve your problem.
As well, your sprocket might not be right for your chain, is it standard bicycle chain, or is it 410/415? I'm not saying it's not clicking at the tensioner, but there's a possiblility it's clicking at the bottom of the sprocket because of the tooth length.
But, I would suggest checking out a few of those things and see if any line up with what you've got going on.