Some guys fill their filters with fresh oil when installing to make sure this doesn't happen. What filter did you use? I'm a fan of K&N because of the welded nut on front.
I read this works well on another N1K forum.When you change your oil, the oil pump sometimes doesn't get enough oil into it when the engine is filled back up. Thus the oil pump just spins in a pocket of air when you start it up & it doesn't pump any oil. This is called "Cavitation". Get rid of the air and the light should go out. Aka as burping your bike. Open up the oil filler cap. Turn the oil filter to release air from the oil system. Its a possibilty thats your problem.
The Service Manual calls for light hand tightening initially, followed by the burp procedure, then tightening more than hand tight - 17 ft lb. There is actually a warning in the manual that hand tightening is insufficient.I'll probably use kawasaki dino oil 10x40 and a k&n oil filter for maintenance...question...I know what the torque value recommended on the filter is..but..secure hand tight should be fine...right? I guess I don't remember what 13 foot lbs of torque feels like in my hand
Talked to the Kawi tech from where I got the bike, sure enough this is a common occurrence. On his advice I started the engine, loosened the filter, got oil dribble, shut off the engine and tightened the filter. Problem solved. Kawasaki needs to list this in the owners manual, it's unnerving for new owners. I've changed all my many bike's oil/filters. Both my Aprilia and Suzuki have horizontal mount filters and neither one has this issue.Just changed my oil by the book. 4 qts. oil, primed the oil filter with oil, "burped" the engine with removing the oil filler plug and loosening the oil filter. The engine oil light remains on. Any feedback?