click when let out the clutch at low throttle

[dannylightning]

i just noticed this this clicking this morning when i was just putting around on the bike, i always gave it a good amount of throttle before. my chain is a little on the loose side, probably over a inch to a inch and a half of play. could it just be the chain catching and making a click, i notice in this video when i hit first gear the chain jerks. I'm gonna tension the chain today or tomorrow, its gonna be a rainy weekend so i probably wont get to ride again till Monday..

this seems to only happen when I'm up shifting and only when i barley give it any throttle while letting out the clutch.. if i give it more throttle no click, the clicking sounds almost exactly like the little click you get when you tap the gear shifter with your foot going in to second

the clutch grabs like it should no slipping.

[youtube:fefxvsya]http://www.youtube.com/watch?v=kfCOjckjmK0[/youtube:fefxvsya]