Engine lubrication system for a vehicle

Motorcycle engine oil filter (71) and the oil cooler (73) of (E) are arranged side by side in the lateral direction to the outer surface of the engine body (EB). First engine lubrication passage extending in the lateral direction (148) is connected to the outlet passage of the oil cooler (73) (142). Second engine lubricating passageway (150) is connected to a first engine lubrication passage (148) extends forward, it is arranged parallel to the inflow passage (132) and outlet channel and (136) of the oil filter (71) ing. The third engine lubrication passage (154) is connected to a second engine lubricating passageway (150) extending upwardly from the second engine lubricating passageway in front than the first engine lubrication passage (148) (150) ing.