asphalt '99 yamaha srx 700 no spark

checking the 2 small wires on the coils, this is the hot and the ground, with a digital meter set on the 20k ohm scale(upside down horseshoe) with the 2 wires you should read "0" resistance.

with the spark plug cap removed, you should read 6.85-6.98 ohms thru the end of spark plug wire to the small wire, I checked all 3 and they all were in this range.
 

ive been trying to get back on for more than an hour. what a crappy deal. anyway they all check continuity. but the resistance at the cap is 11.90 to 12.00. thats much higher than yours but i dont know if that makes them bad. thanks for the help so far but still no spark. can the regulators be causing the problem?
 
am i supposed to remove the cap from the coil? i still think that since theyre all even that theyre ok.
 
ya, just twist off the caps from the wires, they are removeable. The caps have built in resistors for rfi for the ign system.


If you have the voltage you said at the orange wire from the cdi something is wrong, it should spark, since that wire is the one on the plug that was destroyed, check it all the way back to the cdi,(from coils to cdi), you can even test it with a battery charger, unhook the wire from cdi, unhook it from the coils, apply 12volts at one end, and read other end for said voltage, to see if theres a break in wire. The regulators dont have anything to do with spark, they merely keep the voltage at 12volts or lower to keep from frying the electrical componets and bulbs. The only one that could mess with you is the dc regulator, its the plug with white/yellow,white/black,brown,black.

I have a customers 99 srx here in the shop, I will go out and see how many volts are to the coil wire(orange) when I pull it over.
 
thanks a bunch for all the help. i got to packup for tonite though. please shoot some ideas up here so i can check them tues after work.
 
ok, I went and checked this sled, you dont even have to have anything but the cdi plugged in to have spark, I unplugged all of the regulators and left nothing plugged in but the cdi, and nice blue spark. I was sure the regulators had nothing to do with it.

when I check the orange wire at coilpack with red probe in orange and grounded to black wire on coil, I show -1.65 volts at rest, when you pull it over it fluctuates between 15.6-17.18 volts on a single pull. same thing at orange wire coming out of cdi box.

You have a broken wire somewhere from the pick up coil to the coil pack its that simple, you need to start over at the pick up coil and check the output voltage at the plug down by recoil, then at the cdi, then out of cdi orange, then to coil, no doubt thats where it is.

just for the heck of it, unplug the tether, and the kill switch. those 2 are both tied into the grounding of the cdi box.
 
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i tried to post last night but this site is down more than its up!! wtf?
anyway worked on my test track and got it going instead last night.
we are going to grass test at martin again next week. i will tray and get to it tonite and do the new checks you listed. mike
 
UPDATE!!! motor running. the broken 4 prong plug wires were mirrored.
:dunno: :dunno: :dunno: :dunno: :rofl:
 
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