I currently have a Pro Circuit Platinum on my KX, I also still have the stock pipe which is pristine. I know it won't have the great look of an aftermarket pipe, but will with stock pipe perform as well or better than a gnarly. The PC moved the power from the low to mid and top, and I'm spending most of my time in the woods these days. I'm either going back to my stocker, or getting a gnarly. If I stay with the stock pipe, would I benefit from a Power Core II silencer, or Power Core II shorty? I remember the bike having a violent hit in the low end, which I don't mind, and kind of miss compared to the Pro Circuit. I'm definitely on a budget these days, so every dime counts, but, if the benefits are that great, I would be willing to pop for the Gnarly, and probably hold off on the silencer for a while. Might pop for a flywheel weight as well if I stick with the stock pipe. Any thoughts on that are welcome too. I've never added a flywheel weight to any bike I've ridden before. Is it harder on the crank, does it help in rideability when it comes to the woods? Pros and Cons please.