Ive noticed a clattering, just above idle. Ive seen a couple of threads that referred to the balancer key. Did it make a noise first? It doesnt seem to come from that side of the engine. But that doesnt mean anything though. Id really love any input on this, this noise is a little unsettling. If anybody has any experience with piston rattle on these bikes Id like to hear about it. It seems to run fine, but the rattle seems either new or more noticable now.