Idle and fuel leakage issues on my Derbi Cross City 125

[Tom_NnnB]

So, not too long ago my bike has started to develop some problems after running perfectly for around 2k kilometers. I've recently noticed that after a few minutes of riding and when stopped at a red light or just idling my bike shuts off, which wasn't a big deal, but that was just the first of the symptoms. Now, when the bike randomly shuts off while idling it also starts leaking fuel out of the overflow hose and becomes impossible to start. The only changes i've made to the bike itself was that I installed an aftermarket exhaust (fake, derestricted Akrapovic). I've replaced the carburetor with a new stock one (Naraku PZ26), checked out the one I had issues with and didn't see any problems.

 

I have an in-line filter from my gas tank to my carburetor, so i don't believe any debree could have gotten in. I also checked and the float is seating well (I attached some pictures) when the float is hanging fuel leaks, but when it is pressed up (if we're imagining that the float bowl is the bottom side) , the valve seats and nothing leaks. I also took out the float needle itself and when I apply pressure with my finger in the hole which the needle is supposed to be in, fuel doesn't leak, and when i take my finger off,
fuel leaks. So i believe everything checks out and the valve seats just fine.

[bud]

It must be either a bit of dirt on the needle seat, or the float height. It only takes a grain of sand for it not to seal.

Is Naraku really the original carb?