Has anyone else had the oil light come on whist riding down a mountain road ?? We have a Mt Tamborine which I ride most weekends and the decent is a good 2 kms down hill . This is steep enough that the oil light will come on and the engine noticeably gets a rattle in the top end. Last 2 times I have actually turned engine off and coasted down hill. My oil level is full on the dipstick . Thoughts ???