Exhaust systems are one of the most popular after market parts. Buying one of these will make the your bike loud and fast. Their are many popular brands of exhaust systems. Among the most popular are FMF, Pro Circuit, White Brothers, Yoshimura, and  many other less popular brands.
  In the handlebar industry Renthal and Pro Taper dominate the market. Handlebars are among the most popular after market parts. They are less expensive than exhaust systems, usually around $60 for Renthals, FMF(909),or Pro Tapers
  Goggles are an important part of riding gear. They protect your eyes from mud, rocks, and tree branches. Some people have goggles with tear-offs which get rid of the mud by tearing of a small piece of plastic.
  Helmets are the most important part of riding gear. Obviously, helmets protect your head and brain. They are availible in all different colors and can cost anywhere from $70-$425, popular brands are KBC, HJC, TLD, Shoei, Fox, and Fly.
  Boots are another important part of gear. You bang your feet off of the ground all the time and without them you would break your feet and toes almost every time you were to go riding. Popular brands are Alpinestars, Fox, Thor, Sidi, and Gaerne.
  Jerseys, pants, and gloves are other pieces of riding gear that most people wear. Popular brands are Fox, Thor, Shift, O'Neal, and TLD. 

 

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