kill switch hook up

Ryan Leger · Joined: 19 Jul 2012 Posts: 133

I know alot of guys just de tune the carb to shut down the motor i do that as but would liketo add a kill switch has any one done it and what wires do i connect ir tape into im no electrical genius so any pics would help

Cesar Rull · Posted: Mon Oct 22, 2012 8:02 pm Post subject:

interested in responses too.

Jason Berry · Advertiser Joined: 29 Dec 2001 Posts: 295

It would help to know what engine you are asking about.
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Cesar Rull · Posted: Mon Oct 22, 2012 11:04 pm Post subject:

not to thread jack but I have a Cr125

Ryan Leger · Joined: 19 Jul 2012 Posts: 133

Cr125

Jason Berry · Advertiser Joined: 29 Dec 2001 Posts: 295

http://www.swedetechracing.com/news-events-blog/general/which-wires-do-i-hook-up-to-a-kill-switch-for-the-cr125/

This is specifically for the 1999 Honda CR125 engine. Hope this helps.
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Jim McMahon · Posted: Tue Oct 23, 2012 1:24 pm Post subject:

Jason, do you have a bigger pic, I can't quite make that one out!
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Ryan Leger · Joined: 19 Jul 2012 Posts: 133

its for a 97 ignition on my practise motor but it has a wire ust like that so im guessing its the same wire

Cesar Rull · Posted: Tue Oct 23, 2012 2:15 pm Post subject:

So do you just cut the black and white wire and install a switch between it?
when the switch is on the kart will start and run, when the switch is off the kart will automatically shut off?

Seems pretty simple, am I in the right track?

Ryan Leger · Joined: 19 Jul 2012 Posts: 133

im just using a stock cr125 pushbutton kill switch it just shuts engine down

Cesar Rull · Posted: Tue Oct 23, 2012 8:42 pm Post subject:

the image says "this pair of wires..." so do you need both the black and black with white for the switch?

Roger Miller · Posted: Tue Oct 23, 2012 9:31 pm Post subject:

Jeez you guys are killing me here. 10 posts and no straight answer.

On the wiring harness - the two wires that Jason indicates extend back to two bullet connectors, one male, one female. These are probably taped up somewhere along the harness of an already installed engine setup on a kart. Leaving these unconnected to anything, the engine runs. Shorting the two together is the kill function. You can use either a simple toggle switch if you want it to kill and be killed or you can use a momentary switch that you have to press and hold to get the full kill, then when released it will run again.

Most don't hook them up as simply just something else to go wrong, or be in the way.

On our stock moto, we don't use them. On the CR250 in the Superkart, we have it hooked up as the 250 tries to lug a bit and we want a good clean kill.

YMMV

Cesar Rull · Posted: Tue Oct 23, 2012 9:35 pm Post subject:

finally, thank you !!

So if I get a new motor with a new CDI I should be able to find those male and female pins upstream somewhere and connect a switch to them so short them and kill the engine.

So I have to ask, how do you turn of a CR125? So you make stall?

Roger Miller · Posted: Tue Oct 23, 2012 9:44 pm Post subject:

The way the carb is setup and jetted, after the run, just lifting the throttle and pulling in the clutch, the engine dies.
We use a Keihen PWM, jetted with around a 175 - depending on the air... that discussion is on another thread. Just suffice it to say, the engine dies.

Randy Mckee · Posted: Wed Oct 24, 2012 10:09 am Post subject: