Oem isnt 46 ? 3 smaller ?
I just put a 44 on mine going for 2 smaller

It's not really very difficult. Access to the ABS unit is simple. The job took an hour + only because I was extremely careful removing the OEM sheathing around the harness and I must have checked that I was working with the correct conductors at least 7 times! before I cut and peeled away the insulation. Heal Tech supplied me via email with not only the info on which conductors to access, but also two nice diagrams as the instruction sheet that comes with the kit is a bit generic. If one pays attention to detail and takes time, it would be difficult to eff it up.

I have a curiosity question.  My understanding was that the cruise control won't work above 6000 RPM, which happens to be 84 MPH in 6th gear.  Try downshifting to 5th gear and use the CC,  you won't get to 84 MPH on the cruise because that's above 6000 RPM.

So does the Healer modify the speed signal?  Or the RPM signal?

I found a H2 sx se shock and installed it. Settings were left stock so far and it seems  much better than the old shock. It seemed to pogo to much and it felt like the bike was wallowing in curves that had sharp bumps. We will see don't have many miles on it yet as the roads are still winter dirty and cold here in Wisconsin

Many modern motorcycles suffer from inaccurate speedometer readings. The Z H2 is no exception. I don't find it that big of a deal with my other bikes. I can do the math. However as we all know, the Z H2 will not allow one to engage cruise control above 85 mph indicated. 85 on my bike is 79 mph actual. There are many areas where I ride here out west where it's safe and fun to cruise at a speed higher than 79. Long and lonely stretches of high desert highway. Not to mention the many sections of Interstate (which I mostly avoid) with a posted speed limit of 80 mph. So a lot of the traffic is doing 85 mph + with little risk of a ticket. Anyway, hence the installation.

Many Speedo Healer applications are plug and play. One simply locates the connector for the speed sensing circuit, unplugs and plugs in the Speedo Healer adapter harness which has matching male/female connectors. Basically intercepting the speed signal on its way to the ECU so it can be modified. The other end of this harness is then plugged into the Speedo Healer unit itself which one programs using the excellent app or the website calculator. Unfortunately, the application for the Z H2 is not quite that simple. Perhaps because such a connector does not exist on our bikes? Anyway, a wire harness is supplied with 4 conductors which must be spliced into the wire harness at the ABS ECU module. Technically, only two of them need be spliced into this harness. Just locate the rear wheel rotation sensor output wire (white/yellow), cut it and splice the Green SH wire to the cut end going to the bike's ECU and the White SH wire to the cut end coming from the ABS ECU side. The other two conductors on the SH harness are ground (BL) and power (red). I spliced into the ABS ECU harness for these as well although one could run separate conductors for this. It was just simpler to do it all in one place. Black/blue connected to the SH black for ground and Brown/white connected to the SH red for power. It sounds a bit daunting at first, but was really not that hard. One just has to be careful opening up the sheathing around the ABS wire harness to gain access to the respective conductors. I soldered all the connections but one could also use quick splice connectors (supplied with the kit): SH-V4-C and SH-U01. I placed the Speedo Healer module under the seat next to the battery.

My bike's speedo now shows the same speed as my Garmin.