10PCS M4 Main Jet 4mm Carburetor Jets Compatible With Automotive Motorcycle Parts GY6 50cc 139QMB Scooter Motorcycle Carburetor CVK PZ19 Round Head For Part Number 8K1927225B(50-72(M4))

10PCS M4 main jets with 4mm diameter for carburetor applications on 50cc GY6 139QMB and similar 4-stroke engines.These round head main jets are compatible with PZ19 and CVK carburetors commonly found on 50, 60, and 80cc motorcycles.Each jet features a 4x0.7mm thread, total length of 7mm, and a head diameter of 5mm.The size is marked on each jet for easy identification.Package includes 10 pieces of M4 main jets. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.

• Model compatibility includes GY6 50cc and 139QMB engine types ensuring proper fit for various scooter and motorcycle carburetor systems
• Designed for use with CVK PZ19 carburetors featuring a round head configuration for performance
• -engineered M4 main jets with a 4mm diameter to support accurate fuel delivery and consistent engine
• Set of 10 pieces provides ample supply for tuning adjustments, replacements, or multiple installations
• Constructed from brass material to resist corrosion and maintain longevity under regular use