10 Piece M4 Carburetor Main Jet Kit for GY6 50cc

Keep your scooter or motorcycle carburetor properly equipped with this M4 carburetor main jet set designed for compatible GY6 50cc 139QMB engines. The 4mm round-head jets provide replacement options for carburetor maintenance, tuning, or repair. Designed for compatible Mikuni, Keihin, CVK24-26, and PZ19-style carburetors, this GY6 main jet kit offers a practical selection for riders and mechanics. The 10-piece set keeps multiple jets ready in your toolbox.

Key Features

• Includes 10 round-head main jets for convenient replacement and tuning.
• M4 4mm design fits compatible carburetor applications.
• Suitable for GY6 50cc 139QMB scooter and motorcycle engines.
• Compatible with selected Mikuni, Keihin, CVK, and PZ19 carburetors.
• Compact carburetor jet set is easy to store with motorcycle repair tools.

Why Choose Our 10 Piece M4 Carburetor Main Jet Kit

Instead of purchasing individual replacement jets, this motorcycle main jet kit provides multiple pieces for maintenance and carburetor setup. Its compact M4 format makes it a useful addition to scooter repair kits and workshop supplies.

Perfect For

• GY6 50cc 139QMB engines
• Scooter and motorcycle carburetors
• Carburetor maintenance and repair
• Fuel-system tuning
• DIY mechanics and workshops

Keep Your Carburetor Ready for Maintenance

Stock your repair kit with dependable replacement jets for convenient carburetor servicing and tuning.