I recently picked up a 1980 SR500 that's been off the road for years: http://www.dotheton.com/forum/index.php?topic=75801.0
I can't get spark for the life of me. I did the test procedures from Rex's Speed shop.
https://drive.google.com/file/d/1ds48JON5ZCEoU92-dm269MFteAf1Pj-t/view
Initially, the only thing that came back wonky was a very HIGH reading on the coil secondary. Usually low or open is bad. Either way, ordered a new coil from Rex's. This is the proper 1 ohm coil with proper grounding for CDI, etc.
http://www.rexs-speedshop.com/epages/es143131.sf/en_US/?ObjectPath=/Shops/es143131/Products/HTC10
Installed that and still no spark. The test procedure tests the wiring going TO the CDI, but there's no way to really test the CDI. So, I ordered a new CDI from Rex's. Still no spark.
I've gone through the test procedure twice more. I've done it with and without a battery in the bike (the SR500 will run without the battery. The battery has nothing to do with the ignition). I can't find anything wrong.
One slight oddity, and I don't think it's an issue, is that my Radio Shack meter reads on a 200 ohm scale, then goes to a 2K ohm scale. Some of the stator windings are supposed to be 330 ohms. I use the 2K ohm scale and get readings with a decimal in front. BUT....isn't .330Kohms the same as 330 ohms?
Rex's is telling me to sort out the issue with the meter, but if I understand it correctly, those readings are good.
-I checked that the stator and flywheel are matched. They are.
-Tried a new plug and the old plug.
-Pulled the sprocket cover and checked for frayed wires from the stator (even though tests are good). Found nothing.
- Checked from the coil to the CDI and get the same 0.9 ohms (good).
- Tried unplugging the kill switch. No spark.
-Checked the gap on the pickup and got .030-.032, so good.
And on and on and on. What next? Why don't I have spark?
I can't get spark for the life of me. I did the test procedures from Rex's Speed shop.
https://drive.google.com/file/d/1ds48JON5ZCEoU92-dm269MFteAf1Pj-t/view
Initially, the only thing that came back wonky was a very HIGH reading on the coil secondary. Usually low or open is bad. Either way, ordered a new coil from Rex's. This is the proper 1 ohm coil with proper grounding for CDI, etc.
http://www.rexs-speedshop.com/epages/es143131.sf/en_US/?ObjectPath=/Shops/es143131/Products/HTC10
Installed that and still no spark. The test procedure tests the wiring going TO the CDI, but there's no way to really test the CDI. So, I ordered a new CDI from Rex's. Still no spark.
I've gone through the test procedure twice more. I've done it with and without a battery in the bike (the SR500 will run without the battery. The battery has nothing to do with the ignition). I can't find anything wrong.
One slight oddity, and I don't think it's an issue, is that my Radio Shack meter reads on a 200 ohm scale, then goes to a 2K ohm scale. Some of the stator windings are supposed to be 330 ohms. I use the 2K ohm scale and get readings with a decimal in front. BUT....isn't .330Kohms the same as 330 ohms?
Rex's is telling me to sort out the issue with the meter, but if I understand it correctly, those readings are good.
-I checked that the stator and flywheel are matched. They are.
-Tried a new plug and the old plug.
-Pulled the sprocket cover and checked for frayed wires from the stator (even though tests are good). Found nothing.
- Checked from the coil to the CDI and get the same 0.9 ohms (good).
- Tried unplugging the kill switch. No spark.
-Checked the gap on the pickup and got .030-.032, so good.
And on and on and on. What next? Why don't I have spark?