Re: Moped jerking forward when I cut power

Chris Robertson /
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When you open the decompression valve, air leaking into the cylinder might temporarily lean out your mixture causing your RPMs to increase.

Have you tried cleaning the decompression port? If that's how you stop your moped it probably has a lot of gunk built up from oil escaping everytime you stop the moped. Try removing the whole head and wire brushing it with carb cleaner.

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