HELP predator 212cc engine issue

[Bdoe512]

First, I'd like to say I think i posted this on the wrong page earlier, sorry, I just found the engine section.
Anywho...

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

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[Brianator]

Very strange indeed... only thing that comes to mind considering what you've tried would be the fuel float, maybe it's sticking or has a hole in it?

 

[Bdoe512]

Very strange indeed... only thing that comes to mind considering what you've tried would be the fuel float, maybe it's sticking or has a hole in it?

Thanks for the tip Brianator.
Honestly iv never had an engine brand new off the shelf have a stuck float or carb issues, BUT you could be right, i just thought it was odd the way its behaving.

I will be taking the carb off and checking it out, hopefully you are right!

 

[landuse]

Sounds like carb to me. You could always just return the engine and swap for another if they have stock