Doesn't even need to be a bike hack, but thought it might be amusing (and perhaps helpful, in a dangerous way), to see--what's the ugliest hack you've contrived?

I'll start:


Fugly as sin, but first time I've had the cover on for years, nobody will know, and it should last me at least until I purchase a better used side cover.

Okay, here's mine.  It repairs the pin at the rear of the battery cover.  The one that goes in the hole in the rear cowl.  I broke the pin removing the cover.  I reattached it with a small screw threaded into a hole I drilled in the pin. 

I don't have a photo, but on another bike, the battery cover pin was gone.  In that case, I ran the screw into a Blue wiring crimp butt splice. 

When ready to start Big Block up back in early 2015 (has it really been over five years!?) I realised I'd forgotten about a coolant overflow receptacle. There was a garage-use baby bottle lying about nearby so I snipped off the end of the sucky bit and slipped the tube inside with a splash of BMW blue coolant. A quick tie wrap 'secures' it to the frame rail. I see no reason to replace it now.

One of the three sockets on my mirror bracket broke, so...



Hard to see, but I used an old spoke wheel weight as a bushing--the wire passes through the slit so I can tighten the threaded rod down without crushing the wire:



Probably more secure than it's actually supposed to be!