When you look at it you should be able to figure it out. Basically you will have to large bolts that hold the axle carrier to the swingarm. You will need to loosen both of those bolts first, and it will probably take a good bit of torque to get them loose. I believe you will need a 17 mm socket, an extension, and a 14 and 17mm wrench for this. Other combinations can be used, but that's how I did it.
After you loosen the carrier bolts, you will need to loosen the lock nuts on the adjuster bolts, i think this is an 11mm nut. There will be one on each side, and the bolts will be pointing straight out the back from the lower carrier bolt.
Now, to tighten the chain, turn those adjuster bolts in. Count your turns, and make sure you turn each one in the same amount, or your axle can end up angled sideways. Only do a little at a time, your goal is to get about an inch and a half of slack in the chain at the middle. Too much and you'll have problems like it slapping around, and possibly jumping off the sprockets. Too little slack is just as bad, because the chain will get tighter as the rear suspension compresses because of the angles the sprocket is at in relation to the swingarm pivot.
But anyways, once you get your slack set where you want it, tighten everything back up. I would start with the lower carrier bolt, then the upper, then the lock nuts on the adjusters. Make sure you torque the **** out of the carrier bolts. Torque it to "holy crap" ft/lbs and then go a few clicks past that to be sure. If it's not tight enough, the carrier can move and re-adjust itself.
