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AMSOIL Power Foam Carburetor and Induction-System Cleaner for V-Twin Motorcycles

AMSOIL Power Foam Carburetor and Induction-System Cleaner

Shop AMSOIL Power Foam carburetor and induction-system cleaner. A foaming carb cleaner for cleaning deposits from carburetors and intake components.

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Available Sizes

Product CodePackage SizeUnit of Measure
APFSC-EA18 oz. Spray CanEach
APFSC-CA18 oz. Spray CanCase of 12

Product Details

AMSOIL Power Foam® is a high-performance carburetor and induction-system cleaner that strips away gum, varnish and carbon deposits to restore lost horsepower, smooth idle and fuel economy in two- and four-stroke gasoline engines.

Over time, gasoline leaves behind residues that accumulate on intake valves, throttle plates and intake manifolds. Ethanol-blended fuels and equipment that sits between uses make the problem worse. Lawn mowers, ATVs, motorcycles, outboard motors and daily drivers all suffer from the same issue: sticky, carbon-caked intake components that choke airflow and disrupt fuel delivery. The result is hard starting, rough idle, reduced throttle response and wasted fuel.

CLEANS DEPOSITS FROM ETHANOL AND DEGRADED FUEL
Ethanol attracts moisture and accelerates fuel degradation, especially in seasonal equipment like snowmobiles, marine engines and lawn tractors that sit idle for weeks or months. Power Foam's foaming action clings to intake surfaces rather than draining off immediately, giving the active solvents more contact time to dissolve stubborn ethanol-related deposits, gum and varnish. This matters most in carbureted small engines where a single clogged jet can prevent starting altogether.

RESTORES STARTABILITY AND SMOOTH OPERATION
Carbon buildup on throttle plates and intake valves restricts airflow and disrupts the precise air-fuel ratio your engine needs to start and idle cleanly. Power Foam removes that buildup from the throttle body, intake manifold and valve faces, restoring the unrestricted airflow path the engine was designed around. Seasonal powersports equipment like ATVs, UTVs, snowmobiles and motorcycles are particularly prone to hard starting after storage, and a single treatment before the first ride of the season can make the difference between a clean start and a no-start.

MAXIMIZES HORSEPOWER AND FUEL ECONOMY
Deposits reduce volumetric efficiency. Your engine can only make power proportional to the air and fuel it can draw in, and a dirty intake system restricts both. By cleaning the intake tract back to near-factory condition, Power Foam helps the engine breathe fully again, recovering horsepower and throttle response that deposits quietly stole over thousands of miles. That recovered efficiency translates directly into improved fuel economy for cars, trucks and SUVs running port fuel injection.

REDUCES ENGINE PING
Carbon deposits on intake valves and in the combustion chamber create hot spots that can cause pre-ignition and detonation knock, particularly under load or during warm-up. Power Foam helps reduce engine ping by removing the carbon accumulation responsible for these abnormal combustion events.

SAFE FOR FUEL SYSTEM COMPONENTS
Power Foam will not damage fuel injectors, catalytic converters, oxygen sensors or other emissions-control devices. It is also safe for the seals, gaskets, rubber and plastic materials commonly found in gasoline engine intake systems. Avoid contact with painted surfaces and exterior plastic trim, and wipe off any overspray immediately to prevent cosmetic damage. It is not recommended for use in diesel engines, GDI engines or as a general-purpose degreaser.

APPLICATIONS
Power Foam is designed for use in carbureted and port fuel-injected gasoline engines across a wide range of equipment: cars and trucks, motorcycles, ATVs, UTVs, snowmobiles, marine outboard engines, lawn mowers, string trimmers, chainsaws, tractors and other small-engine equipment. It is effective in both two-stroke and four-stroke applications.

DIRECTIONS
Protect painted surfaces and mass airflow (MAF) sensors from spray. Run the engine to normal operating temperature and remove the air cleaner assembly. With the engine running, spray Power Foam directly into the throttle body as fast as possible without stalling the engine. Revving above idle may be necessary. White exhaust smoke during application is normal. Once the engine sound improves, spray enough Power Foam to choke out and stall the engine. Let it soak for 10 to 15 minutes, then replace the air cleaner and restart. Repeat as needed. An oil change is recommended after treatment in four-stroke engines. In extreme cases, disassemble the carburetor and soak individual parts.

Power Foam is available in 18-ounce spray cans. Not available in Canada or California.

Frequently Asked Questions

What engines and equipment is AMSOIL Power Foam Carburetor and Induction-System Cleaner designed for?
AMSOIL Power Foam® Carburetor and Induction-System Cleaner (APFSC) is designed for both two-stroke and four-stroke gasoline engines with carbureted or fuel-injected induction systems. It covers a wide range of applications including auto/light truck, motorcycle, ATV, UTV, snowmobile, marine outboard, PWC, heavy-duty on-road, heavy-duty off-road, agriculture, and powersports equipment. It is especially effective in powersports and small-engine applications that run and then sit for extended periods. It is not recommended for use in diesel engines, GDI engines, or as a general-purpose degreaser.
Does AMSOIL Power Foam help restore horsepower and improve fuel economy in carbureted engines?
Yes. AMSOIL Power Foam® uses powerful foaming agents to remove stubborn deposits, varnish, and gum left behind by ethanol and degraded fuel in carburetors and induction systems. By cleaning these deposits, it maximizes horsepower, restores startability and smooth operation, and helps improve fuel economy. Verified users report noticeable improvements in how clean the throttle body and intake components become after a single treatment.
What type of deposits does AMSOIL Power Foam Induction System Cleaner remove from engines?
AMSOIL Power Foam® specifically targets deposits caused by ethanol and degraded fuel, including gum and varnish buildup in carburetors and fuel-injection induction systems. Its powerful foaming agents cling to internal surfaces to dissolve and remove these stubborn contaminants, which are common in engines that sit idle for extended periods between uses.
How does AMSOIL Power Foam compare to regular carburetor cleaners for seasonal powersports equipment?
AMSOIL Power Foam® is especially formulated for powersports and small-engine applications that run and then sit for extended periods, making it particularly well-suited for seasonal equipment like snowmobiles, ATVs, UTVs, and marine outboards. Its foaming action clings to surfaces for thorough cleaning of ethanol and degraded fuel deposits, whereas many standard carburetor cleaners are simple solvent sprays. Verified users note the foam clings effectively and removes significant carbon and gunk from intake components.
How do you properly use AMSOIL Power Foam Carburetor and Induction-System Cleaner on a throttle body?
Based on verified user experience, remove the intake air filter and hose, then spray AMSOIL Power Foam® directly into the throttle body while the engine is running at approximately 1,500–2,500 RPM. After using the product, let the engine sit for about 15 minutes, then drive fairly aggressively to clear out loosened deposits. Some white smoke from the exhaust and briefly rough running is normal during the clearing process. Note that the foam converts to liquid quickly, so apply in controlled amounts to avoid flooding the engine.
Is AMSOIL Power Foam safe for GDI engines or diesel engines?
No. AMSOIL Power Foam® Carburetor and Induction-System Cleaner is not recommended for use in diesel engines, GDI (gasoline direct injection) engines, or as a general-purpose degreaser. It is formulated specifically for carbureted and port fuel-injected two-stroke and four-stroke gasoline engines. Using it outside of these recommended applications may not produce desired results and is not supported by AMSOIL.