CDI black and white wire - this is hte high voltage kill line that gets swiutched to ground to kill the spark -
this can have 200V+ on it - so I wouldn't take it directly to your X21 - which is likely designed to put out 12V ( will still stop it operating - or zero volt)
I'd run it through a relay -

if you look here OEM ignition hookups
you can see how I recommned doing it on my equivalent to the X21 / motogadget.

So run the engine power out to the relay, and the rest is thesame.
Cheers
Rayman

 

My box has option to ground it out instead of sending a + signal so I figure it works similar but I appreciate the idea and will give it a shot. Got a few relays laying around. Thank you.

 

point I'm making - is that unless the X21 is designed to accept the high voltage and let it float then you could damage the X21 - so check with NWT./ brickhouse builds.

If its only designed to work with grounnd to battery supply - then it wont work with either setting - as it would clamp your non active voltage to the battery voltage still - and that wont work forthe CDI - it needs to be free to charge to the 200V + level to be able to dump that high voltage into the coils.


Rayman

 

Yeah I get what you mean. Brickhouse told me to hook black and white to engine power and move switch to -. Finally got it all together again and wired and tried that. Won't start that way. Reached out again and brickhouse isn't allowed to do tech support any longer so I've emailed nwt and waiting for a response.

Like I said I got relays and Im gonna give it a go. That setup you sent makes sense to me with the way the bike works.

 

Verify that your kill switch is actually opening the circuit on run.
Are you using the stock controls?

 

No sir, also the plug and play x21 controls. Stock style version.

 

With a stock CDI, your symptom would indicate a shorted switch. I can't help with the aftermarket stuff, but I'd start there.

 

I’m just starting to install the X21 Plus S System on my 1982 GL500 Silverwing
Assuming you’ve followed all the instructions and wiring diagrams that are available on-line from NWT (which I’m sure you have), I would wait for direct feedback from NWT - err on the side of caution as you dont want to fry the X21 Control Unit.

I’m interested to know how you get on with the X21, so please keep posting.

 

Actually surprised they got back outside of tech support hours and days. Here's the response cut down to the simple answer and a picture of their diagram which is somewhat similar to Rayman's setup.

Leave the "engine switch" setting to "red dot" and add this SPDT 5pin relay.

 

 

Update. Used 5 pin relay and wired it up. Flipped switch over to red dot. Solved issue.