UPDATE: I edited a few things on this one. THe most important is the threat. I removed a chamfer that made it impossible to srev the funel onto the engine. Additionaly to this I smoothed out the gripping surface for the fingers a bit..
This is an screw-in oil funel for old GSXR's from the late 80's and 90's. The good old oil colled and the first water cooled ones..
The Funel is desinged to be screwed into the oil inlet.
The funel has 3 venting holes and a grippy pattern to work oily hands.
Im pretty sure that the funel will also works with other models like the old bandits, the GSX-F's and so on..
I want to give credit to https://www.thingiverse.com/thing:857406 by MrPenn.