Just bought a X650L, my first bike, and have put a thousand miles on it. Now I can't stop thinking about modifying it. Last weekend I took off all the smog stuff. It was very easy and I like being able to see the engine now. The next step is to do the air filter, snorkel, jetting, and exhaust. Let me know if this is a good plan: First, it sounds like you have to rejet if you change the intake or exhaust so I plan to do all of this in one sitting. So I will start by removing the snorkel (can't be hard, right?) and installing a Uni filter. Next I will disassemble the carb, replace the pilot and main jet, grind off the tab on the mixture screw, add a washer, grind down the slosh baffle, drill out the slide and put it back together again. Finally I will remove the baffle from the stock exhaust. Questions: Everyone says you have to rejet if you change the exhaust or intake. However most people seem to run a 26 series 55 pilot (part no. is N424-26-055) and a 158 main jet (#99101-393-158) no matter what exhaust they are using. Is the intake more important than the exhaust? I don't really understand what I'm supposed to do to the slosh baffle. I have heard people mention removing the baffle from the exhaust but I don't really know what that means. Looking in the end of the pipe, I notice two screws and a couple little tack welds. Is that the spark arrestor? Should I drill it out with a 2" drill or cut the welds, unscrew it, look for something that looks like a baffle, cut it off and then replace the arrestor? Any and all comments much appreciated. Thanks!