Yes. I normally check that the oil is over the metal bar in the oil filler. It often needs topping up so it’s going somewhere.Sorry, You may know this,
But if we find the engine oil low after a layoff, We drain the sump ,
The sump is called a dry sump, But there is always a small cup full of oil in there !,
The engine drain bung is in a round cutaway in the left " Sitting on the bike ",
Front prop stand holding plate,
It has been known to get a few PINTS out of there !,
So get a big tin underneath.
Normaly you should just see a metal bar about 3 .1/2 " Down the oil tank filler hole,
That's what I use as to the highest I want the oil level to be.
I’ve never drained any oil from the sump. I think the plug is brass.
Spoke to a mechanic recently who suggested draining off all the oil and then filling with the correct quantity.
Also mentioned that leaks could be down to insufficient engine breathing and the oil then finds it’s way to the first
gap.