20p M4 Main Jet 4mm for GY6 50cc 139QMB Scooter Motorcycle Mik Kei Carburetor CVK24~26 PZ19 Round Head injectors Nozzle parts(30-68)

Here, we offer 20 sizes of 4mm main jets for 50cc carb.found on 139QMB 50,60,80cc 4-stroke Scooter/PZ19 carb .Please check the size before bidding.Technical specifications: 1, Thread: 4x0.7mm2, Total Length: 7mm3, Diameter of head: 5mm4. Size is marked on the jets.Package includes:20 pcs M4 main jets==========Hign-concerned Chemical : NoneModel Name : GY6 Main JetOrigin : Mainland ChinaMaterial : copper

• Includes 20 M4 main nozzles, suitable for GY6 50cc, 139QMB motorcycles
• Suitable for carburetors such as Mik, Kei, CVK24~26, PZ19, etc
• 4mm specification, round head design to ensure stable oil line injection
• Provide precise oil line injection to optimize engine
• quality materials enhance durability and corrosion resistance
• Precise fuel injection: The carburetor nozzle is responsible for accurately injecting fuel into the engine's intake duct, ensuring that an appropriate amount of fuel is mixed with air to achieve optimal combustion efficiency and improve engine efficiency and power output.
• Multiple specification adaptation: Different engines and car models use nozzles of different specifications. Choosing the appropriate nozzle size based on the engine displacement and requirements is crucial for optimizing performance.
• Improving fuel economy: Good fuel injection performance can ensure efficient use of fuel, avoid waste, enhance fuel economy, and reduce environmental pollution caused by incomplete combustion.
• High temperature and corrosion-resistant materials: Nozzles are usually made of materials that are resistant to high temperatures and corrosion, ensuring stable operation in high-temperature and high-pressure working environments and extending their service life.
• Easy to clean and maintain: Due to the tendency of carburetor nozzles to accumulate carbon or oil stains, regular inspection and cleaning are necessary steps to maintain smooth engine operation. Cleaning the nozzle can ensure fuel injection accuracy and avoid performance degradation or engine failure.