The Tsubaki omega 530, 102 o-ring chain does come with a clip type master link, so you don't need to buy one separately.
Wow. Where did you find a torque wrench big enough to tighten it up again? Dumb question: the engine cover has to come off for this job, yes? Which means, I'll be draining the oil, yes?
My Tsubaki Omega O-ring chain came with a master link, and if I remember correctly, it was actually packaged in the plastic that contained the chain. This leads me to believe that they all come from the factory with the master link.
You will have to change the oil when you replace the sprocket. There's a fiber gasket that fits between the engine cover and engine. If you're careful, you can remove the engine cover without tearing it. Here's a link for a replacement, if it gets damaged:http://nfieldgear.com/enfield-store/10k-mile-lubrication-kit.html
MC-Superstore confirmed: "The Tsubaki Omega chains do not come with master links." I don't know what to think. I'll just buy one and have a spare - it's only a few bucks...
..........I've ordered a chain, and a master link. I'll either have a spare, or I won't.......