I tried to print this both large end down and standing up. Without a doubt, it printed way better big end down.

This fits my 2018 Ural motorcycle. It is small, easy to clean, and travels in the tool bag. Keeps the oil in, not on the motorcycle :)

Update! 2.11.24
Have rebuilt this using a new modeling tool set (for me) and this version is much cleaner and prints great.
No supports. Print with big end down