Acwell Speedo Tacho Installation

[Jonesy]

Hey Brett
I'm an electrical heathen too, but all I can see is they've joined the earths together.
Shouldn't be a drama if you run ''em single or joined.

power direct from battery? I suppose its got a memory to keep alive with power for the odometer?

[Fred]

Hey Bretts,

just how far out of your comfort zone are you in the dark arts of auto electricity.

I would ask just how much is your bike worth to you is the BURNING question

You've got it pulled apart, you've got a schematic, the parts are fitted, so how much can a leccy mech charge

[BrettS]

Another question, I was going to use one of the speedo light wires as power for the acwell but now thinking that would only have power when I turn the lights on, any other sugeestions which wire I could use for general power to the unit?

[BrettS]

I really don't get what they are asking were I have circled in Blue but I figure I will take my best guess. Doubt there is much chance these wires can blow anything??

[BrettS]

Just as I started to get some were on this a couple of days ago I got called in for a night shift. Even with that excuse the pace is pretty slow.
Brushed stainless mount 3mm thick.

The speedo has a magnet and a sensor that needs to be mounted, I used one of the disk bolts with a z bracket and a 90 deg bracket of a caliper bolt to hold the sensor. The magnet needs to pass one, not two of the lines at either end of the sensor and not be more than 8mm away. 



Now I need to sought the wiring  This is were I was planning on handing over to the lecky 

I figured I needed to calm the nerves a little but I think I may be more of a turkey than the drink 


I am still confused as to why negative or ground wires would be connected in group A surely they can't just get connected straight to the other wire but that seems to me what the drawing is saying? Any electrical savvy out there that can give any hints?

[BrettS]

I decided if I have any chance of understanding the electrics of the bike then i have to have a go at installing this Speedo myself. If I get stuck then the professionals can take over, just have to be very careful I don't blow anything
At first the wiring drawing made no sense but as I am writing this I think I am starting to get it.

I wanted to start with what is highlighted in red.
It seems to me that all the A block wires just go to the respective wire that did the same job on the original instruments. But I am a little confused why the negative is only directly to the Neutral and oil lights.
I think I have worked out the RPM setup as the yellow wire just wraps around a spark plug lead but if anyone can tell me what the other option is (install sensor using the supplied bolt of self tapper screw, the instructions say) Guess i screw the wire into something instead of wrapping it around the lead but not sure what i screw it into? What is the CDI ?
Thanks for any help.
Here is the colour wiring chart just to make it easier