For the love of god, I swear I meant not to ride this season. I was out riding last night and at around 4000rpm I started getting some kind of engine knock. The best way I can describe it, is it sounds like a jake brake running on a rig when I accelerate. Its like a really loud slapping or vibrating sound. I just had my valves done 2 months ago could it have something to do with that? God I hope it just a busted spring.. And of course it has to freakin happen 2 days before the memorial ride.. Any suggestions or idea's would be much appreciated..