Really loud THUNK
Posted July 09, 2009 - 03:21 PM
Posted July 09, 2009 - 04:47 PM
My bike is a '99 wr400 and has been running great. The last couple rides I've been hearing and feeling a really loud thunk. It sounds just like a large rock hitting my skid plate. As a matter of fact thats what I thought it was. What clued me in was that it only seems to happen on a hard landing or harsh bump. It's very random and has only happened a couple times but I want to catch the problem before it gets worse. On quick inspection the only thing I'm seeing is a slightly loose chain but not excessivly so. Anyone have any thoughts? Thanks
We are going to need more info to help, I think.
Put the bike up on a stand and inspect the steering head, forks, front and rear caliper retainers, swingarm and linkage, and the top bushing for the shock.
Maybe you have loose motor mounts?
Posted July 09, 2009 - 11:35 PM
Are they or have they been leaking ?
Posted July 10, 2009 - 04:32 AM