Re: Broken, Old, Piaggio Vespa

Joe Woods /
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When there's no spark, there's a natural tendancy to suspect failed ignition components.. but they rarely fail, except the spark plug itself, which can look fine externally but is unable to make spark.

Even with a good spark plug and healthy ignition components, problems with the bike's harness wiring and switches and connectors (sometimes even tail light bulbs or the horn) can prevent spark.

And although a plug and ignition is able to spark, and you can see the plug spark internallt, some carburation problems can immediately foul the plug during an attempt to start and you're back to square one.

Give everything related to ignition a thorough inspection .. read and follow the tuneup tips in Fred's Guide .. systematically eliminate all the possibilities before replacing suspected components like the HT coil.

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