You guys talk about the system being louder than stock. I haven't seen an aftermarket exhaust system for any of the recent high-performance four-bangers yet that isn't MUCH louder than stock, especially for YZF/WR 4xx bikes. I ride with two friends, one has a WR 400, one has a YZ 400, both with FMF exhausts, and if I am right with them, I can't even hear my own bike. The aftermarket needs to address this noise issue, and so does Yamaha, their YZF's are way too loud, even stock. Ktm and Suzuki managed to make good exhaust systems for their four-strokes that have reasonable sound levels, and riders everywhere are yanking them off to put on loud aftermarket systems. We recently lost another good riding area near here, the reason? Too many loud bikes bothering the houses that where a couple of miles from the area. Don't get me wrong, this isn't just a four-stroke issue, there are too many loud two-strokes also. We as a group have to take this seriously.
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1992 KDX 250-FMF porting,two-stage power reeds, Fatty pipe, Power Core silencer,titanium rod,Wiseco Ultra-lite, Pro-Action suspension...Why didn't I take the blue pill???