Product Installation Instructions for M4 Main Jet 4mm for GY6 50cc 139QMB Scooter Motorcycle

Tools Required:

1. Flat-head screwdriver: For removing the carburetor cover.
2. Phillips-head screwdriver: To unscrew the jet holder.
3. Wrench set: To adjust any additional components if necessary.
4. Pliers: For manipulating small parts if needed.
5. Clean cloth: To wipe any spills and keep the work area tidy.
6. Fuel line clamp (optional): To safely manage fuel lines during installation.
7. Safety goggles: To protect your eyes during the installation process.

Installation Steps:

1. Safety First: Ensure the scooter is on a stable surface and turn off the ignition. Disconnect the battery to prevent any electrical issues.

2. Access the Carburetor: Use a flat-head screwdriver to remove the screws holding the carburetor cover in place. Carefully set the cover aside.

3. Remove the Existing Jet: Locate the main jet within the carburetor. Use a Phillips-head screwdriver to unscrew the jet holder and remove the existing jet.

4. Install the New Jet: Take one of the M4 main jets from the set. Align it properly with the jet holder and screw it in place securely, ensuring there are no gaps.

5. Reassemble the Carburetor: Once the new jet is installed, place the carburetor cover back and secure it using the screws you removed earlier.

6. Check Connections: Ensure all fuel and air lines are connected properly. Use a fuel line clamp to manage any fuel lines if necessary.

7. Reconnect the Battery: After everything is reassembled, reconnect the battery.

8. Test the Scooter: Turn on the ignition and start the scooter. Check for any leaks and listen for smooth engine performance.

9. Final Adjustments: If necessary, make any additional adjustments to the carburetor settings to optimize performance as per your riding conditions.

Congratulations! You have successfully installed the M4 main jet on your GY6 50cc 139QMB scooter motorcycle. Enjoy an enhanced riding experience!