When choosing an auxiliary fuel tank, look for compact, easily controlled designs that keep your main tank safe while offering precise fuel delivery for tuning and testing. The best picks below are suited for mechanics working on small engines, carburetor tuning, and maintenance tasks. They range from compact 300–500 ml units to larger transfer tanks for more demanding jobs. Read on to find which is right for your setup and workflow.
| Product | Best For |
|---|---|
| Porotmotor Motorcycle Auxiliary Fuel Tank (500ml with Vent) | Small-engine tuning and carburetor adjustments; secure mounting on handlebars or workbench |
| Royal Vintage Spare A112 Auxiliary Fuel Tank (300ml) | Compact, lightweight testing for maintenance and servicing |
| RDS MFG INC Auxiliary Fuel Tank 60-Gallon | Medium-duty fueling tasks where space allows |
| TAURISH Auxiliary Fuel Tank Workshop Tool Balancing Carbs Carburettor | Carburetor balancing and tuning for motorcycles and multi-use engines |
| MOTO4U Auxiliary Gas Fuel Tank 2L | Versatile fuel transfer with flow control for various vehicles |
Porotmotor Motorcycle Auxiliary Fuel Tank
Brand: porotmotor
- Essential tool for small engine work and carburetor tuning; tests engines before final assembly
- Delivers clean fuel directly to the carburetor with a valve and scale lines for precise flow control
- Convenient and safe design; can hang on handlebars or bench vice; cap has an air inlet for balanced pressure
Best for: Mechanics performing delicate tuning on small engines. This unit is ideal when you need to bypass the main tank to test fuel flow and tune carburetors without risking spills from the primary reservoir. Caution: ensure secure mounting to avoid drops during work.
Royal Vintage Spare A112 Auxiliary Fuel Tank For Servicing Your Bike 300Ml
Brand: PRAZTECH
- Compact 300 ml design intended for servicing and maintenance tasks
- Useful for short testing workflows and basic carburetor adjustments
Best for: Small maintenance work where space is Limited and quick testing is needed. Limitation: information on materials and compatibility is not provided, so verify fit for your specific bike or engine.
RDS MFG INC Fuel Tank – 60-Gallon
Brand: RDS MFG INC
- Large-capacity auxiliary tank suitable for substantial fueling tasks
- Gasoline auxiliary fueling allowed; siphon-ready top access with electric fuel pump
Best for: Projects requiring substantial supplemental fuel capacity, such as workshops or mobile service setups. Caution: verify clearance and mounting options for your vehicle or equipment due to its size.
RDS MFG INC Auxiliary Fuel Tank 37Gal – 71804
Brand: RDS MFG INC
- Auxiliary fuel tank with top-siphon access for electric pump fueling
- Described as a general motor engine fuel tank in product type listings
Best for: Medium-scale applications where space allows and siphoning is a practical option. Limitation: product specifics on materials and mounting hardware are not detailed here.
TAURISH Auxiliary Fuel Tank Workshop Tool Balancing Carbs Carburettor
Brand: TAURISH
- 300 ml tank with embossed fuel increment lines and handy handlebar strap
- Described as useful for DIY servicing, tuning, and carburettor balancing
Best for: Motorcycle servicing where carburetor balancing and precise fuel measurement are needed. Caution: the description emphasizes multiple vehicle uses; confirm compatibility with your model before purchase.
MOTO4U Auxiliary Gas Fuel Tank 2L
Brand: MOTO4U
- 2-liter capacity with fuel hose, cut-off valve, and lid with air outlet
- Designed for easy connection to motorcycles and can assist with refilling transmission oil on some bikes
Best for: Wider use across motorcycles and similar engines where a controllable transfer of fuel is needed. Caution: verify hose size compatibility with your fuel line fittings before ordering.
Buying Guide
What size should I choose for my project? Pick a size that aligns with your workflow. Smaller units (300–500 ml) are ideal for carburetor tuning and testing without impacting the main fuel system. Larger transfer tanks (60–69 gallons) are suited for workshops or longer service sessions where frequent refueling is impractical from the main tank.
How important is flow control? Very important. Tanks with a valve, scale lines, and an air vent enable precise control of fuel delivery and smoother operation, reducing the risk of flooding the carburetor during tuning.
What mounting options matter? Look for versatile mounting—handlebar or bench vice compatibility—so you can position the tank safely while keeping your main tank protected.
Is compatibility to consider? Yes. Confirm that hoses, fittings, and tank dimensions fit your vehicle or engine. Some units specify use with gasoline and require electric pumps or siphoning top access.
What about safety and maintenance? A secure mounting system plus a vented cap helps maintain balanced pressure and reduces spills. Clean fuel delivery is essential during tuning, so choose tanks designed to minimize contamination risk.
FAQ
- Q: What is the typical use for an auxiliary fuel tank?
A: For testing, carburetor tuning, and servicing small engines or motorcycles without risking spills from the main fuel tank. - Q: Can these tanks be used with any motorcycle?
A: Many are designed for general use, but verify hose sizes, fittings, and mounting compatibility with your specific model. - Q: Do all units include a valve or flow control?
A: Several listed options feature valves, embossed measurement lines, and air vents to manage flow smoothly. - Q: Are larger tanks practical for workshops?
A: Yes, larger tanks support more extensive testing or longer jobs where frequent refilling from the main tank is inconvenient. - Q: Is siphoning needed for all models?
A: Some tanks require siphoning from the top using an electric pump; others can connect directly to a fuel line via hoses. - Q: Do these products come with warranties?
A: Warranty details are not provided here; check the product listing for manufacturer or seller terms.