Originally Posted by groundrules
That is a Scott's steering damper, and is quite a desirable bit if aftermarket kit. I'm sure any inmate here would gladly trade you that get-up for a stock oil filler cap :)
There is a procedure to check oil on from the bottom end of the motor, but it must be done when cold. A running or warm bike moves oil up into a reservoir in the frame, which is where one would check oil level on a warmed up bike.
We're posting at the same time :)
The procedure to check oil when cold isn't really a good check. You take out the phillips screw down near the bottom of the clutch side, below and to the front of where the kick start is (or would be on e-start).
If oil does NOT leak out, you don't have enough to safely run the motor....but it doesn't really tell you how much you DO have....