Weak Spark

[cicone]

got a decent ride in on the new CDI, but very difficult to start.
does anyone know what voltage i should read at the red/white stator coil wire with an analog voltmeter? don't think i'm getting enough juice to trigger the capacitor on the cdi to charge and discharge?? when i crank it by hand with the plug out, i'm reading about 50 volts AC---sounds a little low?? anyone??? :think: was getting a faint spark last night, but now don't see one at all.

 

[cicone]

scratch that last post----just tested the ac output of the stator coil via a very firm kick. analog voltmeter set at 50 AC and my reading is 30 volts max----on a new electrex coil that tests at approximately 405 ohm. I'm stumped---can it be that i've had a couple af bad coils? maybe some sort of high voltage short in the wires coming out of the stator?? Carver, Jag, Jason??
I'm sure it'll bump start---just not enough juice with a kickstart to get her going.

 

[tedkxkdx]

I think the manual states 370 ohm to be max. At 405 you may have too much. But I am not sure if that is related. Have you tested your spark coil? You do have to take it off the bike to do the two tests.

 

[BRYDEN1]

Is the air gap on the trigger coil adjustable? Try closing the air gap a little at a time. Sometimes you have to slot the mounting holes to allow adjustment. I have found this to work on several machines that were hard/no starts and very boggy on the low end yet fine in mid to top end. The gap WAS within spec, but closing the gap solved the problem. I don't know if this will help, but it has worked for me on several units that tested OK but ran terrible.