A Tank Bra - not like they are flopping around or you need the support so it won't sag.
Yes I have one, i was given as a gift, and it's still in the box.

 

A radio on a bike.

 

Or tangle up in the rear wheel.

 

I put a cup/bottle holder on my bike. I used it once and realized that i didn't like it. Gave it to a friend to accessorize his Honda.

 

Back in the day, I actually had one do that to me. Locked up the rear wheel and put me down on the road. It was a then new 1970 Honda CB350.

 

Cobra fi2000 piggyback tuner.

My own fault probably; I researched these before buying one and, from reviews, determined they work great on bikes without a stage II or cam upgrade. It was a couple of years before I got around to installing the Cobra fi2000 and yessiree, by then I'd installed a complete stage II with SEST and SE204 cam. I got lots of surging and hesitation for my money till I took the Cobra off. That was that !

 

..... oh well
......... then, i s'pose it's the genuine, HD branded, handlebar mounted coin holder
............ said holder does not give up coins easily once inserted. 'Specially w/gloves on

... how many ?

 

pine scented air freshner, they don't hang to well off the bars

 

Hypercharger by Kuryakyn.
Biggest POS I've ever bolted onto a bike!!!!!!!!

 

I agree, I installed one on a friends bike and rejetted his carb for him. I had to squelch my desire to laugh the whole time I was installing it.