cdi box

[quad racer]

trying to wire a km racing cdi box,if i leave the ground wire unhooked it will run but wont shutte off. not sure how to rewire ,any help would be greatly appreciated. it is a 06 viper 70 2 cycle.

[LynnEdwards]

I don't know anything about KM CDI's, but in general CDI's won't work with the ground disconnected. Therefore I suspect the wire you are disconnecting isn't the ground wire.

It could be the kill switch wire though. On most chinese quads the engine is stopped by applying a ground to the CDI kill connection. On etons the spark is *enabled* by applying a ground to the CDI. Spark is killed by *removing* a ground. Note that this wire is separate from the CDI's real ground wire.

Maybe your new CDI has the more common chinese style kill switch connection? I couldn't google up any info on KM CDI's.

Since etons apply a ground to the kill switch connection to enable spark, then maybe you can rewire this wire to the real ground of the new CDI. That way the CDI has a ground only when the ignition is on and the kill switch(es) are in the run condition.

[quad racer]

Thanks for the info, by leaving the cdi kill wire unhooked and hooking its ground wire to the ground circuit of the quad everthing seems to be working o.k. thanks again

[quad racer]

The cdi box i have is on ebay #150384380157 extreme power.Mine is red and sayes km racing on it. I wired it up today and everthing seems ok. I guess we will find out if it is any good tomarrow,10/31, we have a big race. My son cant wait. Thanks again