Transmission knock

[chopper246]

I am a new owner of a 2005 1200gs and had a question. Here is the condition: engine idling, in first gear with clutch engaged. If I pop the clutch suddenly just enough to engage the clutch plate to the transmission, I hear and feel a knock in the transmission. If I repeat the same thing slowly, the clutch grabs as expected without any knock. I don't hear any knock when driving/shifting normally. Could this be from normal play in the drivetrain that is amplified by my rapid on and off clutching? Bike has 13,000 miles on it and well cared for. Thanks.

[marc]

To get a feel for exactly how much play you have put the bike in 1st while on the center stand with the engine off. Now rotate the rear wheel noting how much it moves from stop to stop. That covers transmission, drive line, and FD slop. On my bike it is about 4" of movement from stop to stop measured at the circumference of the tire.

You may be able to hear a clunk which sounds like it is coming from the transmission when doing this test.

And welcome to the forum.