I just bought an '04 DR-Z400S, it runs like a bat out of hell and I have been having a blast ripping around fire trails where I live in the Panhandle of Florida. There are a few issues that I think are all just carb setting/jetting issues. Any help or input is welcome. Problems: 1. The bike idles rough. Pretty sure it actually misses combustion every now and then at idle. If left alone, it will sometimes stall. 2. When I'm cruising at the low end of the rpm range, maybe 1/4 throttle, the bike will hesitate and surge. It's been hot and humid here, as usual. 3. When I let off the throttle and clutch when I am coming to a stop, occasionally the engine will cut out. 4. Sometimes when I clutch and let off the throttle, or even put it in neutral the engine won't come all the way down to idle. Setup: Stock exhaust 3x3 mod Keihin FCR (pretty sure it's the 39mm) If there are other mods, I'm not yet aware of them. I don't know how it's jetted. Thanks!