Question about 2003 Honda XR 650 L
To check the ignition coil, unplug the wires going to it and check the resistance with an ohm meter. There are two parts of it to check, the primary and secondary circuits. The primary circuit is the low voltage side where the black and green wires from the harness attach. The resistance through this part of the coil should be between 0.16 and 0.19 ohms. Check the secondary side by measuring the resistance between the spark plug lead and the primary side where the green wire was attached. The resistance there should be between 3.69 and 4.51 ohms.
The resistance through the pulse generator, as measured between the two wires that come from it, should be between 468 and 572 ohms.
Generally, the various components of the ignition system are very trouble free. If you're not getting spark to the spark plug, be sure to check all of the bike's wire harness and connectors for corrosion, melted connectors, broken wires, etc.
Posted on Nov 22, 2009
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Posted on Jan 02, 2017
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