Condensers for points Ignition

[Milan]

So I was having trouble with spark on a G3SS.
Other post.

I pulled out the old coil.
Then tested the condenser.
It had about 25 ŰF

So I soldered on the new condenser.
Checked the condenser again, and it read bad.

Does heating up the condenser when soldering too much ruin the condenser?

Or is the reading just because the coil is hooked up now?

other = I still got the 1.6 ohm reading with the new coil when tested, and not the 0.5 ohm as the book says.

M

[m in sc]

i mean, it can hurt it. the best way to test one is to power the ignition and check to see if the points arc a LOT. Or, put 12v to the condenser, and check it 5 minutes later with a volt meter see if its holding a charge (has to be disconnected to do this). it is, after all, a capacitor. test it as such.

IF you cant find the right one, you can use a car condenser ( I like ford v8 condensers when doing this) and mount it near the coil. (actually works better that way). .02

[Milan]

I have some spare RD condensers.
Microfarads within spec.
But mounting not the same.
Does the Condenser need to be grounded to the stator plate?

Im sure I could epoxy it in the same place

[m in sc]

it absolutely needs to be grounded.

[Milan]

OK, with the ground

So next dumb question.

With the points off I can test continuity.
Points closed get sound.
Points open nothing.

When the points are installed onto the stator plate, are they supposed to act the same way?

I get sound whether open or closed.
Is the circuit being completed by the condenser?

or is this not supposed to happen.

Thanks.

m

[m in sc]

only if they are not connected to anything will they show difference using an audible continuity test.
if they are connected to the coil, will show continuity, (through the coil) same with the condenser. the points are just a normally closed switch.

[Milan]

So now I need to figure out why all 3 coils i have are reading 1.6 ohms when tested thru black wire to stator plate.
And book says 0.5 ohms or less.

M

[m in sc]

that actually seems right. (1.6~-2.1)

.5 ohms is wayyyy low, thats even too low for a cdi coil. .02

[dgorms]

Milan, zero your meter out before testing.

[Milan]

So I have a pic here from the manual.
https://www.dropbox.com/s/5gu5e7dnde2qz7i/20221019_083135.jpg?dl=0
At bottom

Yes, does not make sense to me that (3) coils read the same 1.6 ohms.
And book says 0.5 ohms.

but in the video, the guy tests it, and it yields a 0.1 ohms.
https://youtu.be/59YXP-dEO9c

put together & still no spark

M

[Milan]

Anyone know of a CDI that will retrofit into this?

M

[m in sc]

get an analog meter and test, they are cheap and better suited than digital ones for testing this stuff.

. one thing bout those bikes, the ignition is pretty robust, you have something wrong for sure, and it should be easy to fix.  my 67 has the same system and has been fine for 55 yrs.