Ok, I,ve heard different things about this but havent found any instructions on how to do this. Here's how I did it and what you will need.

2x 5/8" plastic male tee's ( hardware store )
1x 2.5'-3' piece of 5/8" rubber hose ( I got fuel line hose from auto parts store)
1x small breather filter ( auto parts store )

total cost- about $9
time- 20 minutes

1. Remove airbox fairing
2. Take off top air box cover
3. Remove lower air box ( dont know what its called but there's 4 bolts holding it to the frame.
4. Disconnect the air sensor and take off lower air box and shove the 2 hoses back through their respective holes, it slides off the air intake ( big rubber horn looking piece)
5. I had to cut maybe 1" off the stock hose on the left side in order for the T's to fit and not pinch the hose
6. Connect the 2 hoses on the bike into 1 of the "T" connectors
7. Connect the piece of hose you bought to the other end of the "T" connector
8. Take the hose and run it under the frame towards the back of the bike so that it comes out near the swing arm in the rear. ( this is the hardest part and took me the longest, I used some black cable ties and connected the hose to existing wires to keep it off the engine )
9. Establish where you would like to put your breather filter ( mine is on the left side near where the swing arm and side rails meet )
10. Cut hose and connect the other "T" connector and breather filter
11. Connect the hose to the last spot on the "T" and run it down to somewhere on the inside of the swing arm ( a small bit of oil may drip out of here from time to time so make sure that it won't drip on the path of your tire. You can connect a catch can as well if you like but a minimal amount of oil will drip if any.)
11. Out of your leftover hose cut maybe a 6"-8" piece and shove one end through one of the empty holes in the lower air box. ( thats where you removed the hoses in the beginning ) Then shove the other end of the hose through the remaining hole.
12. Put everything back together and you're done, and remember to make sure that the new hose is secured and not rubbing-pinching any thing else

Sorry about not having the techincal terms for everything but hey i'm not a mechanic