Question about 2003 Honda XR 650 L

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No spark on spark plug how to check ignator coil and pulse generator

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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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Why my 94 Astro van will not fire

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check pulse generators first, i found one burnt and one was open on my 87 hurricane 600. Ohm the wires out for opens or low ohm readings readings,they should be about 400ohms or more. if thats good then check out spark unit..if thats good then check to see if coils wires are getting 12v. Then if that is good check resistance of primary and secondary plug wires. or just replace them anyway and that one less thing to worry about. you have new plugs and wires. it can only really be the coils or pulse generator. hope this get you in the ballpark can iget a helpful on this thanks but if i helped you fix it by checking the pulse generators i'd like a very helpful, appreciate!

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