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yamaha terrapro

  1. Yamaha terrapro yfp350 spark plug issues

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    Hi I have bought a Yamaha Terrapro YFP350 with spark plug issues. It seams to kill the spark plug if i don't disconnect the coil lead. The problem is when its lift connected it won't start. when i check for spark it does something very unusual and confusing, when I earth the spark plug there...