I start the GS up just to keep it happy and give it a quick lap of the shed and yesterday the oil pressure switch came on and it died. No suprises really but what could be the immediate cause of failure? I examined the dipstick to see if all that oil that is leaking resulted in no oil and the stick showed plenty of oil, nice black filthy oil. I plan to whip the motor out and do a rebuild but it had me wondering what might cause the problem, I can only think there is so much filth in the oil, strainer pipes or wherever and it just went no you need to clean me out! I hope I haven't seized it.