Lubricant supply for two cycle engine
 An apparatus and method for maintaining the control of lubricant to a two cycle engine so as to provide adequate lubrication without over lubrication and deleterious exhaust conditions, such as smoke. The system includes a lubricant pump that has both its output and its timing of discharge variable. Under one range of running conditions, the normal conditions, the output of the pump is maintained constant and the timing of the output is varied. Under high speed, high load conditions, the time of operation of the pump is held constant and the output time of the pump is varied. 
Yamaha Hatsudoki Kabushiki Kaisha
F F F
F01M F02B F02B
inventional additional additional
Hideaki Noritaka
Ito Matsuo