Checking coolant F650 without removing sidecover
I have a 2000 F650GS Dakar. Not sure how many other models this applies to, but despite all the cute engineering from BMW including an inspection slot cut into the LHS plastic cover, it's impossible to see the coolant level! Yeah, very lame. (Maybe others have different experience? Perhaps possible with very dark green coolant?)
Anyway, I'll cut to the tip...
What I do is take a small torch (say AA MAGLITE) and direct it from behind the sidecover, up/under/behind the reservoir. This back lighting provides the required contrast and when you shake the bike about a bit you can see the level!
Probably works best in the shade/in doors.