My bike is ticking...

[Dead Eye]

I'm pretty certain it needs the carbs balanced, I've been trying to convince my bank account that I can afford the necessary tool (I prefer to do the work myself). It picks up fine and revs freely once its warmed a little, it never starts on just the button though, I always have to give it some revs when starting even if I use the choke.

How do I attempt to reset the tensioner? I tried doing a little bit of Google search but came up empty