So I thought my chain might have been loose and been hitting a little bit while i was accelerating, but after i tightened my chain i still noticed the same noise. It seems to be coming from my left foot peg area, and it happens when I accelerate through 1st gear to 4th. The clunking noise will happen about 3 or 4 times and then stop, then it will do it again when I shift up. I will hear it every once and a while in 5th and 6th gear but not much. Help please, I want to get out and ride.

 

Maybe your chain is too tight, or not lubed enough. Same thing happened to me under both those circumstances.

 

Maybe by being loose you stretched the chain (loose in some spots tight in others). Check your slack the rotate a bit and check, etc.

 

I noticed the same when i do really aggressive breaking with my bike.
I adjusted my chain to spec. I think it use to do it before but i had the plastic oem chainguard which make it not as noticable as it now is. Just have to lighten up on the brakes i guess.

 

Sounds like the clutch to me, same thing going on with my bike currently.

 

I think ive got the same problem....its loud and other people can hear it driving behind me....it also makes the noise when the clutch is in an im deaccellerating...mine just started 5 days ago. I also just tightened the chain recently. I dont like the sound of it being a clutch issue. my bike has 19k on it.