HOW TO CLEAN A MOTORCYCLE CARBURETOR

Keeping a clean motorcycle carburetor is important to prevent performance issues with your bike. Regular cleaning helps your engine work efficiently, prevents corrosion, and can help you avoid costly repairs. It also supports better fuel efficiency and helps preserve overall engine power.

Removing and disassembling the carburetor on your motorcycle can be a tedious process. Taking shortcuts, such as removing the bowls at the bottom of the carburetor, spraying cleaner inside, wiping down only visible residue, and reinstalling the bowls, is not recommended. A thorough cleaning requires proper disassembly and attention to detail to ensure the job is done correctly.

Air exposure through the intake can cause fuel in the carburetor to evaporate and leave behind a sticky residue that clings to internal surfaces and builds up over time. Infrequent use of your motorcycle can also cause the gasoline to thicken, restricting the movement of the carburetors small, precision components. Connections attached to the carburetors throttle and choke plates can also become stiff or sticky when dirty, which affects overall performance.

If the carburetor gives off a turpentine-like smell or an unusual chemical odor, different from the smell of gasoline, it is likely overdue for a cleaning.

Its important to use a non-corrosive cleaner that does not damage or degrade plastic or rubber surfaces on the carburetor. Avoid using vinegar as acetic acid makes metal susceptible to corrosion and rust. Additionally, bleach should also never be used as sodium hypochlorite can degrade rubberized seals and corrode metals such as steel and aluminum.

A safer alternative to harsh chemicals is Simple Green Pro HD Heavy-Duty Cleaner, which is non-corrosive and optimized for use on aluminum, stainless steel, and other metals. This professional-grade, engine-safe formula breaks down tough grease, oil, road grime, and other automotive fluids, making it an ideal choice for cleaning your carburetor.

Directions for Cleaning a Motorcycle Carburetor:

Tip: Check the owners manual before cleaning the carburetor. Always follow the manufacturers instructions for cleaning and maintenance. Make sure the carburetor is cool to the touch before cleaning.

1. Dilute. In a large bucket or container, mix 1 part Simple Green Pro HD Heavy-Duty Cleaner to 3 parts water (ratio of 1:3).
2. Clean air filter. Before cleaning your carburetor, check the air filter to make sure that the air coming into the carburetor is clean and free of blockages, as restricted airflow can result in black smoke emissions from the exhaust. Shut off the fuel supply and disconnect the spark plug wire. Remove the housing and loosen the wing nut to detach the outer filter element. Use a can of compressed air to remove debris.
3. Remove the carburetor. Disconnect any linkages and hoses using pliers and a screwdriver. Remove any covers or clamps that are holding the carburetor in place and remove the hose clamp that connects it to the fuel line. Remove the carburetor and use compressed air to blow away any loose dirt on the outside casing.
   • Tip: If you are unfamiliar with this procedure, consult with a professional before cleaning.
4. Remove the carburetor float bowl. Loosen and remove the bolt holding the carburetor float (bowl-shaped reservoir), being careful not to spill any remaining gas from inside the float bowl (dispose of this securely). This is a common area for varnish buildup on carburetors. Next, remove the pin that the float pivots on and place it aside in a safe spot. Now pull the float straight out of its casing.
5. Remove additional components. Remove any remaining carburetor parts necessary for cleaning access. Keep all components in a safe place and note the order in which they were removed to ensure correct reinstallation.
6. Soak and scrub components. Place the carburetor float and other components in a large bucket or container filled with the diluted Simple Green Pro HD Cleaner and soak thoroughly. Use a brass brush to scrub all the metal components and use a stiff nylon brush to scrub all the plastic components. Pay close attention to the small vents and other small components to ensure they are clean.
7. Rinse and dry. Rinse all carburetor components in a clean bucket or container filled with water. Place the components on an absorbent towel and allow them to air dry completely. For small holes and vents, use a can of compressed air to remove any excess moisture.
8. Reinstall. Carefully reassemble the carburetor and mount it back onto the engine. Reconnect all hoses, clamps, and wires.