as stated before the manual will be your best friend here, but here is what you have to do. And if you have the "tools" that came with the bike you will be fine.
1) turn motorcycle off and on centerstand or stand of some sort bringing the rear tire off the ground.
2) remove the pin going through the rear axle bolt with pliers, most likely will need to buy another pin.
3) Put wrench on left side axle nut (the shifter) side of the bike.
4) Loosen the Right side of the axle nut.
5) Jar tire to loosen it a little
6) Then take an appropriate sized wrench and the 2 bolts at the end of the swingarms on both sides, turn them clockwise to tighten the chain and make sure the arrow is equal on both sides. There are little hash marks to make this easier
7) Then just do the reverse and lube chain up.
good luck