I have an NST 250 s9 quad ,I got it 2 months ago .I've only had it running for 30 seconds and now and no spark .just replace the CDI .still nothing any ideas.does anyone know where to get a wiring diagram for this bike

 

um lets get the first question out of the way. Are you holding in the brake to start? they have a safety switch build it. Also is it in neutral..

 

yes I'm holding in the brake and it is in neutral

 

I have replaced the left hand control switches .thinking that it could be bad

 

if you ever figure it out, please post, i have a 90cc china quad ive been working on for months, new spark plug, replaced ignition, ignition coil, cdi box, and stator, once i replaced the stator i had spark for about a minute, now its gone, im so sick of this thing im gonna scrap it. i just dont understand it. all the kill switches are good, must be something shorting it out.

 

pull the kill switch wire out of the cdi. this will eliminate that whole circuit. Does it have a neutral light that is on?

 

still no spark, is driving me nuts.it looks like a really nice bike and its very well put together .

 

Do you have a picture of the CDI and coil? SHouldn't be much to replace those.

 

I have already replaced CDI .but I'm not getting power to the coil

 

If your CDI has a rectangle harness that uses 5 of 6 wire positions, you can remove the middle wire from the harness to isolate the "kill" circuit. This will let you know if the kill switch or other safety is the problem.