What's your KTM Duke 690 low-speed fueling fix?

KTM Duke 690—especially on earlier models—has a reputation for jerky throttle response and bad fueling at low speeds. However, this issue has been a complaint by many owners and has taken what would have been an otherwise enjoyable riding experience and has made that less enjoyable. The riders have proposed many solutions, from simple changes up to those that require more changes. There are some who swear by ECU remapping, others who prefer mechanical tweaks, and then others who like aftermarket parts. This is an interesting question to ask because this is a problem that Duke 690 owners have been trying to solve in different ways, and some of these solutions are better than others, while the others don’t work at all, and perhaps this would help other riders to improve the low-speed performance of their bike.