My bike makes a little 1-2 second rattle right when I fully release the clutch in 1st gear. It is not real loud but I dont think it does it in any other gears. It does it right as I am fully releasing the lever, once it is all the way out it stops. The faster I let out the clutch the less it does it. Any body have any idea what this is? It does not slip at all just this little rattle.