HELP Predator 212cc engine Mini-bike

Bdoe512

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Today i finished my mini bike build with a Predator 212 engine. (Engine is brand new never used)

The first 5 minutes was fine, it started and ran, then died after about 5mins.

After some tinkering, i checked the oil, right now the dip-stick shows that it is full and fine.

The engine will Idle FOREVER if i leave it at an angle (tilted left or right)
But as soon as i straighten it up it bogs down and dies, if i quickly tilt it before it shuts off, it will go right back to idling just fine.

Why is the engine not running when straight, only when its tilted?

(Things i have ruled out)
Carb - It will wide open throttle and idle just fine at an angle.
Low oil sensor - Tried to unplug the sensor just for testing purposes, didn't seem to make a difference.
Gas - Got some fresh gas in it, just bought some today.
No leaks.

Need help from anyone who might have experience with these engines, and why the heck it won't run when straight!

If you need pictures i can do that too
 

pearl111

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Maybe there's something wrong with the float in the carburetor. Take the float bowl cover off and check to see if it's stuck. Or at least make sure all is working ok within the float bowl area.
 

bob58o

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I'd be exchanging that engine for a new one that doesn't have that issue. Harbor Freight returns are easy as long as you are in the 30 or 90 days (whatever it is).
 
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