Vacuum line routing 110 pocket bike

If you search this up on google or you can find a tutorial which tells you how to put it back together.

chk your tank and lines for trash blockage, when you get fuel to the carb go from there, the overflowing is caused by the needle valve in the carb sticking open, usually caused by trash in the fuel, make sure you are getting fire to the plug as well, I know for a fact the wiring systems on these things are not quality systems.

hey Steve, you put the carb back together incorrectly somewhere.. take it to a qualified professional, let him check it and reassemble it... it wil be fine after doing this... --Check the air filter.. make sure its clean...

Lean mixtures burn very slowly, at times slowly enough to continue burning through the power and exhaust stroke, causing a backfire when the intake valve opens, and that flame gets a shot at the new mixture charge.

In normal operation, as the engine slows, the fuel delivery from the main circuit falls off, and the idle circuit is supposed to take over. If the idle circuit flows insufficiently, that becomes a transition to fuel starvation.

You can try pointing an unlit propane torch into the inlet air, and see if you can get closer to an idle while supplying a supplementary fuel source. You will need to do this in a way that gets propane to both carburetor inlets, maybe rigging a Y with vacuum hoses and electrical tape...

This started with work on the carburetors, so the fuel system would be the most suspect. That, and the fact that it will run at higher RPM would seem to rule out fuel delivery.

I was looking around at photos while developing this answer (needed to know whether this was a twin or a 4-cylinder), and one resource said the idle speed should be 1,200. I don't know if that's right, but maybe 1,000 RPM is too slow for this motor to keep it together. (I do doubt that, though.)

When I wrote that last sentence, I started to second guess myself, thinking "What if the fuel shutoff(s) is/are vacuum operated, and as the bike approaches idle there is insufficient vacuum to hold it/them open?" But the I rejected that, because there is even less vacuum at cranking speeds, yet the bike starts.

Hello if you had the fuel tank off make sure you did not hook up the vacuum line to the fuel outlet and fuel line to the center fuel petcock vacuum connection

Bad things happen! Unless your with someone in the know, find someone in the know! lol. Seriously!

you have to put the piston at the top and the sprocket and crank at the bottom hope this helped

check the clutch switch,

That tube would be the overflow tube. Your carb float is sticking open and allowing fuel to flow in constantly. You need to take carb apart, clean needle valve, and inspect or replace carb float.