When I put the key into the ignition the oil light goes on and disappears once I start the engine. I remember that when I turn off the bike (kill-switch) the light comes back. After I laid the bike down (only about 20mph) the light does not re-appear when I kill the engine. Is this a concern and should I stop riding immediately? However, when I turn the key to "on" the light appears and goes away after ignition normally.