I use one of these.....easy to attach to handlebars and remove....

Nite Ize HandleBand Universal Smartphone Bar Mount | REI Co-op

 

I will have to try this setup when I start riding again in the spring. I didn't think that the transponder could be read through the plastic lid.
With my RKS, I did not want to mount it to the windshield. Not only would it look like ***, but I ride most of the summer without the windshield on. And I sure as hell won't mount it to the headlight nacelle!
I have been using one of those cell phone holders that wrap around your upper arm with Velcro, like many joggers and gym rats use. It has worked well, but it would be nice to not need to do that anymore, so I will definitely try your setup.

 

If works behind a windshield, why wouldn't it work through plastic? BTW, the windshield is a glass and plastic laminate.

 

Mine is top center inside the outer fairing

 

Oh, I don't know, maybe because I am one of those rare people that actually read the mounting instructions that came with the transponder. The instructions stated that mounting the thing in any location other than the windshield may result in it not being read by the sensor. So, I didn't bother to try, since around here, if it doesn't read, we get charged the full fare instead of the reduced fare. I just figured that it must have something to do with it needing to be behind something clear, like the windshield, or out in the open, like on my arm. After all, I am not a transponder expert. But, thanks anyway.

 

Yes, I am quoting myself.
Sorry to jake24 if I seemed snappy with my reply. I should know better than to post while in a $hitty mood. Like driving drunk, never a good idea.

 

I had mine mounted inside the top lid of my tour pack and it never worked for some reason. Went back to mounting it on the windshield

 

I see that you are from NH as well. Before I came up with the arm band idea, which does work, I tried to zip tie it to the top of the backpack I was wearing on the ride to work. (I have since ditched the backpack.) Even though it was on top, it wouldn't read. I have found, from talking to others, that the transponder readers at the toll plazas sometimes won't read it, even when mounted according to instructions. I had even gone to the EZPass office to have my transponder tested, to make sure it wasn't defective. IMHO, I don't think the NH DOT has the sensitivity level set high enough, if that is even adjustable. It seems that other nearby states don't have any issue reading it, even if it is sitting in the console of your cage. I have even been charged incorrectly when driving my truck. It would read that I was towing a trailer, which charges you a higher toll, even though I have never towed a trailer on that stretch of the toll road.

 

I have a few tools, a bottle of oil and my rain gear in the right saddlebag. I just leave my transponder on top of the rain gear. Not sure what I will do if I need to wear the rain gear and go on a toll road.

 

Double sided tape on the "chesty" go pro mount works. But, I don't ride in many toll areas. Usually just the Chesapeake bay bridge tunnel and they require motorcycles to hand the transponder to the toll operator and they scan the bar code.