Pisser/water indicator - Tells you if water is being forced through the engine as coolant.
Waterbox - It is the last chamber the exhaust gases go through before exiting the exhaust system. It also makes the ski quieter like a muffler on a car.
Kill Switch - It is usually located on the left side of the handle bars and stops the engine when pressed.
B-Pipe - Is a exhaust pipe made by Factory Pipes and comes in two design's: Limited (for stock engines) or Mod. (For ported engines)
OEM Yamaha Parts - Original Equipment Manufacturer Yamaha Parts - Parts made by Yamaha and that are already on the ski.