Well, to each their own, I guess. I ran my Tenere for four years without any engine/electronics mods, believing that suspension etc was the way to go. Mind you, I hadn't done many km in that time, but I'm in no hurry.

However, the low-end snatchiness on/off throttle finally wore thin, so an O2 mod went on. Most of that went away immediately. This is a fact for my bike.

Don't know about any other Kev mods, but based on my experience, I can't see why the others wouldn't work too.

Detractors are certainly entitled to their opinion, but then so am I, and all the members who are satisfied with what they've bought.