I got a new bike and so far I am very happy with it. After I joined this board I started thinking about putting some modifications. My question is: how does one go about improving S40 power/speed if one is new to motorcycles?! Can Suzuki dealership install whatever mods you guys will tell me I need??
Thanks.

Adding a Supertrapp muffler or Raask exhaust coupled with the carb mods described here will make a huge difference in power and driveability. Adding a Supertrapp was not exactly easy as I had to cut off a bit of the header pipe for proper fit. The carb mods are not terribly difficult for an experienced mechanic.

The mods are very worthwhile. How someone who's inexperienced with mechanics accomplishes them...I have no idea. Find a friend or look for a mechanic. If you're willing to learn, folks on this board will walk you through it.