tubebender said:
I've had the City bag and electric tank ring for 1.5 years and never had a problem.
You would seem to be in the minority. How many miles of use?
I have the non-EVO rings and started with the powered rings. It was fine for a year or so, though I did have one of the small pins break and Twisted Throttle replaced the ring for me at about 6 months. The second ring started getting inconsistent, cutting power at various times, causing the GPS to re-boot, which was more than a little annoying when you needed the next turn info. IT continued to get worse and was not a pin issue this time, eventually getting to the point where I ran a new power connection and used a SAE connector to allow separation from the bike, leaving the lead long enough that I could still move the tank forward onto the bars when re-fueling. I spoke to Twisted Throttle, who was absolutely fantastic to work with, and they told me they were not going to import the new EVO style rings in the powered version until they had some good feedback that it worked better than the older version.
They sent me a pair of EVO rings, (non-powered), gratis, which I did not expect at all. I haven't used them yet, but ended up yanking all the powered bits off the lower non-EVO ring and am using that as an unpowered set up because I like the ease of use and though miss the simplicity of the powered ring, it's great to not have to worry about the GPS cutting out mid instruction.
I know some riders that have been successful in sticking a rolled up newspaper under the bottom of the bag at the rear to 'shim' it and avoid or reduce the intermittent power issue. I tried that, but it only helped for a short time before getting bad enough to give up and go with a separate power wire. FWIW, I picked up the SAE connectors on pigtails at the local NAPA store in the trailer wiring section. Cheap at ~$4.