Just looked it up at https://www.bikersdiscountstore.co....-electronics/healtech-ar-assistant-pd-324.php Good price at £400 for the DIY kit. I've not used it, but it looks like pretty much like every other retrofit Traction Control system apart from being able to be setup via their App. The issue is that retrofit system are just programmed to limit power at any given rev in any given gear. So not so much of a Traction Control system, but more of a power limiting system.
