I have a question. I have a 08 ZX10R with a BMC Race filter and M4 GP slipon. I also have a Healtech X-Tre. I have been running this setup for a little over a year now. I noticed on decel the bike would pop so I bought some Ivans block off plates. These helped for a little while but the popping is getting more persistent. I know the bike is running a little lean. My question is "Do I need a PCV, PCIII, or something equivalent?" I dont want to spend $300-$400 dollars on a PCV and AutoTune if I dont need to but I also want to ensure my bike is running good and the engine wont wear sooner than later. Also, for those of you that have either of these installed, do I need to take it to a shop for tuning or can I just use one of the pre programmed maps since my modifictaions are minimal? Any advice you can give me would be greatly appreciated.