It's only good for altered bikes. For stock bikes nothing works best the stock carb.
I have good hands on experience using genuine carbs and fake and one's. Fakes ones generally works best but it's material is of poor quality Jets ki Jo jagain hothi hain wo slip ho jathi hain. Needle jaldi ghis jatha ham genuine like deni ones done have this issue. They last a lot longer. Agar chair khvani na ki Jaya thi deni original pz22 and replica ma srf 19/20 ka farq reh jatha ha..