Correction the rough idle still exist but I'll address that after the electrical issue if it still exists once that is resolved.

Anyone have any ideas why I'm getting current in the load side of the master resay fuse when the fuse removed. Current with ir removed is 8.23 volts on line side. If I remove rhe signal fuse it drops ro 2.2 volts.

[2015 Z Force 800 53/Trail EPS]

The only times I see anything like that is when several loads or circuits use the same or a common ground that has ..for some reason..a high resistance..causing some back-feeding through another circuit. It is never the same voltage as the line because it is passing through another load and the ground resistance. Some of these ground "busses" or unions are within the harness and then a single lead returns to a grounding point. On some all come together at the grounding point. Need to review a wiring diagram to see what else uses the same common or ground as that system does and ohm-test their grounds only. Maybe you can narrow-down where it is. Otherwise it may be normal to have readings like that and not to worry about it. 

Thank you for that information. Do you know where I can get ahold of a wiring diagram?

[2015 Z Force 800 53/Trail EPS]

Thank you for that information. Do you know where I can get ahold of a wiring diagram?

This is a scanning of one for a 22 out of a hard copy manual. May not work for your needs but it's all I have. Other then it I don't know of another.

https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:1bd1da92-38f8-40f2-b5f8-027bb4527058

Awesome thank you so much. I'll take a look. Even thought its for a 22 it should at least give me some general location data. Thank you!

Well I think I found the issue. Corrosion on the ground cluster by the battery. Cleaned them all up and put some dielectric grease on all surfaces before putting back together. Going to check for more ground points and clean them all before testing again.  Before doing this I did test and it appears the downstream 02 sensor is bad after only a little over 100 miles... wtf

[2015 Z Force 800 53/Trail EPS]

Well I think I found the issue. Corrosion on the ground cluster by the battery. Cleaned them all up and put some dielectric grease on all surfaces before putting back together. Going to check for more ground points and clean them all before testing again.  Before doing this I did test and it appears the downstream 02 sensor is bad after only a little over 100 miles... wtf

Dielectric grease is an insulator not a conductor. Shouldn't have put it between all the contact surfaces. People do it all the time but doing so cuts the electrical contact area by 70+%. Best to clear it with a good spray like carb cleaner, get good clean metal to metal, then assemble it and coat it over the top with a good anti-rust spray paint.

Damn wish I saw your reply earlier. Duly noted thank you much!

So I just replaced the 02 sensor and it still ran like crap and got the code for b1 sensor 1 low voltage again... cleared codes and decided to try running with the 10amp main relay fuse removed. It started right up and was the idled smooth like it used to.. but obviously I can't run it without that fuse as a lot comes off that. I really need to figure out why there is 8 volts being sent to the load side of that fuse holder but I am at a loss! Has anyone had this issue before?

Pulling the master relay I get battery voltage to the bottom right connector which would be relay pin 87 and 8.7 volts to the top right connector which would be relay pin 30? 

[2015 Z Force 800 53/Trail EPS]

Pulling the master relay I get battery voltage to the bottom right connector which would be relay pin 87 and 8.7 volts to the top right connector which would be relay pin 30? 

On a standard relay, pin 87 is load and pin 30 is battery and with no power or ground to the coil (86&85) those two are not connected.

I just pulled each relay one at a time. When I pulled the fuel pump relay the voltage dropped from 8.7 down to 2.1 volts. If I leave all relays in but pull the signal control fuse rhe voltage to the load side of master relay fuse drops to a little over 1 volt.

My biggest thing is this machine only has 100 miles on it. This year has been so damn busy we never had time to take it out other than riding down the rd to the neighbors. It's garage kept stock and never been rained on. Yes boring I know lol. Could you possibly post a pic of inside your fuse block showing relays and fuses? The only thing I can think of is if a relay could possibly be installed backwards? I do know my neighbor was over and he was checking it out and pulled a relay. Don't ask why as I asked him the same damn thing

[2015 Z Force 800 53/Trail EPS]

I don't own one of these so mine would be very different. I think you need to take this thing in.