I'm putting new plug wires and caps on the 500 Intimidator I'm restoring and I noticed a difference in Ohms between the new set and old set.
My old wires with no caps are showing .2 Ohms
New wires with no caps are showing 11 K Ohms
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The first thing I'd do is check the points. I'm sure whoever built the engine or did the restoration replaced the points. When a set of points are installed, the breaker block, that piece of fiber that rubs on the breaker cam that opens and closes the points, wear rapidly to begin with. Check the points and set them at 0.018". The timing should once again to back to the proper setting once the points are correctly set. Then, test the primary resistance of the coil. Take the wires off the small terminals on the coil. Using a digital volt ohm meter set the meter's function selector switch to OHMS in the R X 1 scale. Put the red lead to one of the coils connectors and the black lead to the other. Your meter should read between 5 and 6 ohms for use with points. Now, if your bike has been converted to an electronic igntion, the coil's primary resistance should be between 2 and 3 ohms. To check the secondary of the coil, put the meter's selector switch to OHMS, in the R X 1K scale. Put one lead into each coil tower. The meter should read about 16.0 K to 20.0 K.
To test a twin ignition coil on a motorcycle you will need a pocket multimeter.
With the meter set to kilo-ohms(1000 ohms) scale,place one test lead into one spark plug cap & the other test lead into the other plug cap.(this is called the ignition coil secondary resistance) The reading should be around 20-40kilo ohms.
If a high reading exists check again with spark plug caps removed(they un screw from the lead) then check caps seperate. Caps typically read 5 to 10 kilo-ohms.
A faulty plug cap is not as un-common as you might think.
To test ignition coil primary resistance set the meter to ohms(lowest scale) Place one meter test lead to the small wire going into the coil & the other test lead onto the coils body(where its metal) The reading should be only 2 to 5 ohms.
The slow circuit on one carburetor may be plugged. But bad spark plug caps could also be the culprit along with one plug being fouled. Try a squirt of carburetor cleaner in the gas line for the jets. Check the OHMs on the spark plug caps should be 5000 OHMs . If it is higher or lower replace the cap or cap/wire. Either the cap unscrews off the end of the wire or the wire is removed by unscrewing the cap on the coil.
Your motorcycle has two spark plugs per cylinder. Both spark plugs share a similar coil. If one of the two spark plugs is burning a different color from the other on the same cylinder then you either have one bad plug or one bad cap/wire. The wire and cap are one piece on your model. So you can buy a wire assembly from Honda or try just putting an NGK cap on the end of your old wire. The cap on the wire should test at 5000 OHMs anything higher or lower and you replace the cap. Of course the cheapest option is to just try a new plug first. The resister can burn out in a plug causing the same issue.
Unscrew the plug boot from the wire and look at the tip of the wire if you see some blue or greenish corrosion cut off about a 1/4 inch of the wire and replace the boot on the wire Ihad that problem before on a 89 CB 750
Try the cheapest route first. Have you installed new spark plugs? Spark plug caps are notorious for going bad on this model. Unscrew the caps from the end of the wires and check them with an ohm meter. If they read higher or lower than 5000 ohms, replace the spark plug caps. You might also have a bad coil wire. Unfortunately, the coil and wire are sold together. You could spray some water on the right wire, when it is dark, to see if there is arcing or shorting on the wire. If so, replace the coil and wire. New Honda part if available, a good salvage part It might be just as old or as bad as the one you take off.), or Accel makes some good aftermarket coil sets with wires.
have you checked the spark plug caps, if they read above or below 5000 ohms replace them. If they are good then the news is bad. You could have a bad cdi box but more likely with this model , you have bad pulsar pick ups, which unfortunately are part of the alternator assembly. These can be checked without removing the engine by taking readings from the plug going to the cdi box. ac generator disconnect the stator wires at their connections. X10omega white-blue 77-95 ohms green-white 387-473 ohms orange-green 95-116 ohms light blue-green 95-116 ohms orange/red-green 81-99 ohms light blue/red-green 81-99 ohms
The fuel filter is in the tank on the petcock and is self cleaning. I suspect you have bad spark plug caps on your bike the cap is part of the wire. If you remove the wire and take a reading with an ohm meter, the cap should read 5000 ohms . Anything above or below and you should replace the cap. This is probably causing the slight miss.