Hi guys just picked up this 2004 250r for dirt cheap, it has an odd noise which I think is the decomp working at very low RPM for some reason but I want other opinions. Video: The idle isn't great as you can tell, in the beginning I am saving it by giving it a little gas but at around 0:20 the idle starts to come down and around 0:22 you can hear it going to die and making the noise which I think is the decomp. It only ever happens at extremely low RPM as it's about to die and I think if I sorted the idle so it didn't drop down it would go away. Can someone confirm? I don't think it's the chain as I think for such an old motor it sounds pretty healthy!