Moped runs without spark cap

Luc Bordier /
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Recently I have instaled a 70cc performance kit from treatland. And it is making a loud high pitch engine noise if you go past 20mph, I’m not sure if I messed up the break in period or something but would anyone have an idea how to fix this? Also, the engine continues to run even though the ignition is off and it continues to run when I take the spark plug cap off the spark plug, there is clearly electricity running through the bike but I have no idea what to do to fix this, would anyone have any ideas how to trouble shoot this or anything please let me know

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