I got a little 100cc fiesta i think or some other make i dont know the exact make but it was running fine 3 days ago but now it wont even start. I tried cleaning the carb and got a new spark still i got no luck. Please help.

When it does not start spray come starter fluid into the throttle body/carb to see if it will run. If so, it is a fuel problem. Also check electrical connections for looseness.
Possible contamination of the fuel with water.

Mine did that. I just had the carburetor cleaned out , and now it runs fine.

when you rebuilt it did you find what killed it? lots of times crank seals go bad causing an air leak and they run lean and ruin the motor. could be happening still.

check earth cable/s
dont jump start with a running car engine,it will send too many volts.
do you have spark?

Sounds like it may need some carburetor work. If you've stored it without any fuel stabilizer added, mixed well, and ran through the carburetor a little, even for as little as 30 days, the fuel can break down and leave deposits on the small mixture jets inside. Spraying some carb cleaner while starting and running will sometimes loosen up those deposits, but more often than not the carb will need to be taken apart and cleaned.

Run a compression test (3-5 seconds) , with throttle closed, then repeat with throttle open. Should be around 100 psi closed and 125+ with it open. This will give you more direction.

just for fun, while you're cranking it put your hand over the intake of the carb completely covering it and see if your hand gets wet with gas. this might even start it too.

Fuel issue blocked jet maybe on the carb unlikely as new but sounds like a fuel starvation issue

check your compresion relese

probably gas.