The engine is equipped with two oil pumps and a common oil circuit. A pressure pump supplies reliable lubrication to the crankshaft, piston, balancer shaft and valve controls. It also ensures cooling of the ignition and lubrication of the clutch. A suction pump draws oil from the crankcase and uses it to lubricate the transmission.
Developed for tough enduro conditions, the 510.4cc SOHC engine is characterised by an extremely compact design, very easy maintenance and outstanding robustness, with weight kept to a minimum. Together with the Keihin fuel injection system, this results in unrivalled performance and rideability - specially designed for enduro use.