Yes I have owned a 07 Versys and most of us adjusted the throttle position sensor, however some friends convinced me the 2015 was a huge improvement. After owning both, the ABS makes the bike worth the purchase, however
, the headlight reflector sucks, no way of installing a LED bulb to get a improved light output, what I mean by that , the beam pattern is all over the place. Another huge negative is the 2500 to 4000 RPM range, anyone jumping onto a 2015 -2016 from a MK-1 or MK-2 expect a big disappointment.
If you still have the bike apart, a very simple mod, bring out the vacuum lines, I used a stainless steel 1/4 bolt and cut the threads off as a vacuum plug. The photo shows my gauge on the 2015 using 1/4 vacuum couplers , the line for the extension I think is 7/32 , purchased from a auto supply store. One point, usually one throttle body has the adjustment screw all the way in , many times it is cylinder #2. Finding vacuum sync off usually is a indication that the valve clearance is off. When I did my valve shim on the 2015, the sync was bang on, no adjustment needed.
So I mentioned in my other post about a new flash available for 2015-2016 650 Versys, I did that on my ECU, I can say the bike is now superior to both my old 07 and the original 2015 before the flash, since I end up in the below 4000 RPM whenever passing through small towns when riding on the highway, this flash has been worth every penny, as in 2018 I considered getting a different bike, the only thing stopping me was the extensive amount of mods I had already completed on the Versys. I can say this one is now a keeper with the new flash.
Notice the white couplings on the vacuum gauge, the red and yellow tape represent cylinder #1 red & #2 yellow
These lines are wire tied to my Denali split sound balm horn compressor, so minutes and I can check vacuum sync without removing anything.
Lines brought out from formerly capped ports on the TB , red is cylinder #1