Lubrication system for two cycle engine
 A lubricating system for a two cycle crankcase compression engine wherein a recirculating lubricating system is provided for lubricating at least one main bearing of the crankshaft and a second non recirculating lubricating system is provided for lubricating other components of the engine. A drain system drains lubricant accumulating within the crankcase back to the engine through its induction system upstream of a check valve contained therein. 
Yamaha Hatsudoki Kabushiki Kaisha
F F F F F F F
F01M F01M F01M F02B F01M F02B F02B
inventional inventional inventional inventional inventional additional additional
Masanori Hideaki
Miyamoto Ito