I have an oil pressure gauge that replaces the oil pressure switch for testing purposes.

Obviously its located down by the oil filler and so not visible whilst riding - ok, you could fit an elbow and have a good look down.

I got it off ebay but originaly it came from 'evoluzione cyclesports'
part no: 50102

The gauge looks pretty much like any generic 7 kg/cm2 or 100 lb/in2 fluid pressure gauge.

Some one like 'Pirtek' should have them fairly cheaply.

You could tee off the standard pressure switch and look down if the light came on.

:) Crust

Remove the oil light? That's the sort of thing unscrupulous sellers do!

No one believes them anway

thats why I bought the test gauge

unscrupulous sellers zap the bulb ;)

:) Crust