====== W ======
===== Watt =====
Unit for expressing electrical power. Watts= Volts x Current  ((Haynes Sportster manual 1970-2010 pg REF*53))
===== Wear Limit =====
===== Welsh Plug =====
A small solid dish shaped disc which is used to seal the hole in a case where it's been drilled, etc. ((http://www.vw-resource.com/welch_plugs.html))

===== Wet Liner =====
A liquid cooled engine design where the pistons run in liners that are surrounded by engine coolant  ((Haynes Sportster manual 1970-2010 pg REF*53))
===== Wet Sumping =====
AKA Sumping. A condition in which the engine oil collects in the bottom of the engine, or oil filter instead of being returned to the tank   ((mycle1000 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1649421&highlight=low+oil))
===== Wheel =====

===== Wheelbase =====
The distance from the center of the front wheel to the center of the rear wheel
===== Wheelie =====

===== Woodruff Key =====
A half moon shaped or square key set into a slot on a shaft used to keep a slotted gear from turning. 
===== Wrist Pin =====
Gudgeon pin or piston pin   ((Haynes Sportster manual 1970-2010 pg REF*49)) Holds the piston onto the connecting rod.


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