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What is wrong when a 125cc dirt bike just cut out and has no spark?

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Answer

Look very closely at the spark plug boot where it connects to the plug wire; remove the boot and trim back the wire a slight amount then reconnect. Also check the coil connections to make sure they are clean and tight. Generally this is a simple fix ; you just have to find the bad connection.

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First answer by 1930fcoupe. Last edit by 1930fcoupe. Contributor trust: 791 [recommend contributor]. Question popularity: 57 [recommend question]

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How do you get spark on a 110 cc dirt bike?  When my 125cc dirt bike that just cut out and has no spark whats wrong?