I just had the Freedom performance true dual sharktails installed on my 2018 Cheiftan Darkhorse 111 thunder stroke. Install went smooth bike started no issues or codes. Went for a ride up the road came to a red light geared down to first bikes idle dropped below 750 and stalled out. Started back up fine road down to another light geared down to first let off the throttle stalled again. The bike had now been flashed by the dealer twice and no one has a clue to as why this is happening. Essentially told me to just keep giving it a little throttle when waiting for the light? Doesnt seem like a pretty good fix. Anyone know what's going on? O2 sensors ? Does the bike need to be dynoed I'm at a loss here so much money bleed into this situation.