if your Harley throttle by wire acts up and high idles when cold starting, dont panic
Try This
To reset your idle setting back turn the ignition switch on for 10 seconds off for 10 seconds (do not start the engine), repeat a total of 4 times. That should reset your original throttle position.
The throttle by wire will remember throttle position each time the bike is shut down
That said, some are having problems rolling the throttle a bit when using the kill switch
This can cause this type of problem
There is just a bit of roll on with this set up compared to cable type throttles
The little extra roll on can = higher RPM when starting This does work, I tried it on mine when I first got it