The 1300 Oil Level Sensor is a very basic system and not really to be relied on as I found out many years ago.
I had an A1 with the deep sump and the sensor fitted and number 5 cylinder seized at the crank which then snapped the con rod and came out throught the front of the crank cases...............all at around 90 mph on the M1.
Through all this the oil light never even flickered, yet there was only 3 litres in sump when I did the post mortem. The bike had burned 3 litres of oil over 400 miles before it happened...........and I was non the wiser as was relying on the light coming on in advance of an issue................how wrong I was.
Even if you have the correct amount of oil in the motor and accellerate hard, you often see the oil light come on as the oil level alters, which frightens the life out of anyone !!
Agreed that the only certain way is to use the Level Glass and keep the level up to near the top !!
Why Have Four When You Can Have Six ?
The following user(s) said Thank You: Neville, CWB
Now an interesting fact The Voyager crankcase has an oil passage already drilled, tapped and plugged in the location where the oil pressure switch is located on the KZ1300 crankcase, so an oil pressure switch could easily be incorporated on the Voyager.
Patzilla 1986 ZN1300 crankcase diagram item # 92066-059