QXBER Carburetor Pwk 21 24 26 28 30 32 Racing Carb Universal 2T 4T Engine Dirt Bike Motocross Motorcycle Scooter ATV Quad () 34mm

Can someone tell me what other 2 hose nipples are for? I got the fuel line hooked up, and the overflow just like my original carb had. But 2 open

how do i install

What's the smallest main jet available, and what brand/s are compatible? I have pwk21 (and it does work on motorized bicycle)?

Will this work with a tao tao coolster 110cc atv