LED Hyperflash

Anyone know the secret to eliminating the hyperflash when installing aftermarket led front signals? I know the non-US market bikes come with them, but the enormous incandescent front signals on the US bikes are hideous. I've installed similar-looking but much smaller & nicer CNC Racing led signals, but cannot find resistors to make them happy. The ones that came with the signals were over 3 ohm, and the leds would not light at all; I've tried 4 more versions of the 1.5 ohm/10 watt resistors, which should mimic the original bulbs, but I only get one flash then nothing or still hyperflash. The only option which works is a homemade resistor using a small incandescent with wires soldered on, wrapped in high temp insulation.. but even that isn't dependable as the tungsten's resistance changes as it gets hotter. I had to deal with something like this on other led retrofits, but it was typically finding a minimum resistance for the flash module to work right. Is there an alternative led-friendly flash module available, similar to what you can use in vehicles? Stuck with goofy fast flashers at the moment.

There may be a switch in the ECU to allow for LEDs, specially if the Euro models come factory with LED. You could look at the Ducati by Rizoma led flashers and see if there is a part breakdown.
I have CNC LEDs to install at some point, but it will be a few weeks as I am off on vacation in a couple days and don't want to start tearing it apart before leaving.

The Ducati Performance ones plug right in. No resistors needed.

After fighting with this issue from multiple angles, I gave up and wired the new leds direct, expecting to just deal with hyperflash. Turns out, with the engine running they are fine- but cut the engine and the flash rate increases, something I've never seen before. I expect there are capacitors in the led boards, and with the small drop in voltage they revert to short discharge. So there ya go.
I'd post video but it's a pain: engine running, flashers normal; with flashers still on, cut engine, they speed up after about a second.