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Hello gents,, well once again ill say this as easily as calling my dogs,, im the worst fxxking mechanic on the face of the earth...ill take it...heres my deal i just spent 3000 bucks getting my top end redone and carbs completely rebuilt.. so i test ride runs pretty good,,, ..background.... the ignition switch was sooo worn anything basically you stuck in would start it... as forth it has the ket to a safe in it, worked great,, till i rolled er off of the trailer ready for a glory ride... KEY WOULD NOT TURN AT ALL...you can only imagine my frustration.,, you cant ,,i have issues,,,so i promptly ordered a new 1980 b kz 1ooo ignition w 2 shiney new REAL KEYS,, low and behold. 6 days of pacing and near sling blade activity...the box is here,,,,firstly the damn plug doesnt match...looking at all wires coming out of each. The bike has a YELLOW WIRE that my new one does Not.....ahhh the life if a carpenter... so i cut both off. All wires on the new are correct in color. Im just missing MR YELLOW... So i wired all together sans the yellow wire... lights on,, hoooray. Will not start, start button does nothing...so tell me something the will make it work,,, besides trying again ,which i will ,,, ordering a correct one. Anyone wanna send mr stupid a link i appreciate it..however anyone have anything that will let me take a ride ,,,,christ... thx fellas

fun times!!!
What are the wire colors on the new switch?

What are the wire colors on the old switch?

Also, the number of wires coming out of each switch

Ok mr f64,, old , original switch ( i guess ,as i bought the bike used) 6 wires. Brown, green w brown stripe, ,2 white,, yellow,red blue... new switch,, same. But missing mr yellow... thx brother

Ill dig around I think I have a B4 wiring schematic...

Cool thx,, see if you can tell me what mr yellow does? And how can i just wire it temporarily till i find the correct ignition... thx sir

Could it have been yellow with red?

There should be 7 wires coming out of the switch with 6 going to the plug, and a black one going to the horn. See attached photo of the wiring diagram below. I've hilighted the switch. The colours on the diagram are what should be coming into your switch. Apologies for mis-spelling ignition.

Cool thx,, see if you can tell me what mr yellow does? And how can i just wire it temporarily till i find the correct ignition... i need to correct myself. There is indeed 7 wires in tne stock ignition. thx sir

the yellow or yellow red is power to the start button that powers the coils thru the run stop switch...

HRM couldnt he connect the yellow red to a brown ? the brown is a switched power thru ignition...

Stock ignition pic

connect yellow with brown
Look at the "on" section of the chart in the green square.
When you switch the bike on, the white power wire is connected to the brown and the yellow.