Someone please help with my bike (video included)

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c110

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Hey guys, I have a 110cc pit bike and my throttle broke, so I bought a new one online and installed it. Now when I start my bike this is what happens. (video below)

What is wrong with my dirt bike? - YouTube

Btw, when the bike starts and it revs, its not me using the throttle, the bike does it itself. Also when I use the throttle it bogs down, and when I turn the choke off it stalls.
Please answer because im really keen to ride. Thanks guys :)
 
have you had the carb and/or manifold off?

sounds like a bad vacuum leak..

check the oring that seals the carb to the manifold and the gasket that seal the manifold to the head...

also check the exhaust gasket in the head as it sounds like its leaking in the video...

make sure you installed the throttle slide the correct way in the carb... large notch (not long thin notch) on the slide goes to the idle screw side on the carb
 

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