Need electrical guru ASAP got to race tomarrow ?

[gsxr400 racer]

Out of the blue have no spark funny thig is forever ive had each coil with one wire that has power when check with test light , when you turn the key on other gets power as you hit the starter button! But Now when im supposed to go race sunday and just rebuilt my motor i have power to all 4 wires when you turn the key on and no spark what the hell is the logical explanation . Ive seen this before but for the life of me cant rember where or on what or what the heck is was!


PLEASE HELP SOMEONE, Last race of the year!!!!!!!!!!!!!!!!!!!!!!!!

[tomacGTi]

If the coil is getting voltage and not discharging the ballast (to the plugs) something is up with the exciter circuitry which leads to the CDI. How about the spades that connect to either coil?

Check all wiring to the coil, at least try the coils in another known running bike (and the CDI as well). Check ignition to make sure the circuit is recognizing that it's on.

At least that's where I would start for no-spark.

-Randy

[gsxr400 racer]

i have power to all 4 wires when you turn the key on and no spark

:

The bandit 400 is not cdi so i should not have all 4 wires hot , Just the 2 orange ones. Right?  Thats how its been forever with this bike! Coils are Nology profire and 3 months old, spades good , But not rulling out pickup coil or coils! Damn already been up 35hours trying to get it done !

[Maniac]

Right, just the 2 orange wires should be hot since the 400 sparks 1 and 4, and 2 and 3, at the same time (I think thats the order).

Check the pickup then start working back on the connections. The signal coil should have a resistance between 80 and 120 ohms on the brown and black-blue wire on the harness.

[gsxr400 racer]

Thanks all i have to take a little power nap then get back at it cheers

[turbo-bob]

One time I forgot to plug in the 2 wire conector for the pulser !

Had the 12V to the coils................no signal

[PeteSC]

STOP PLAYING WITH THAT BIKE AND DO YOUR HOMEWORK, YOUNG MAN!!!!!

  (Obligatory geezer content......)

[PitterB4]

So what happened, Jay?

[gsxr400 racer]

Well didnt go racing, I got a wire crossed somewhere, I can unplumy cdi and i still have power to all 4 wires on the coils have tried new new coils, can unplug the pick up still 4 hot wires no spark can jump on/off switch after disconnected still 4 hot wires electrical is a pain in the ass . i spent all my loot to get this thing ready freshin it up and because of some f-ed up electrical gremilin that wasnt there till i drove home in the rain with it on the truck after the weekend before last hell i even blew it off with air but never started it just comensed to tair the motor out and rebuild the top endSo i got another week and then im going to a track day at puttnum park road course in Indiana for nesba gotta ride this motor had  alot of break thru's milled her a bit more ,put gixxer pistons in the the b4 motor the gixxer ignition timming plate,degreed the cams damn i wanna hear it run!!!!!!!!!

[PitterB4]

That sucks, man.  Good luck gettin' her back together for Putnam.