sthus 4L Replacement Petrol Fuel Tank for 49cc–80cc Motorized Bicycle — Externally Threaded Outlet, Cap & Petcock

This is a 4-liter replacement petrol fuel tank from sthus designed to swap into 49cc, 60cc, 66cc and 80cc motorized bicycle engines quickly and reliably.

If your original fuel tank is cracked, leaking, or simply worn out, this sthus 4L tank offers a direct, user-friendly replacement with an externally threaded outlet and included cap and petcock hardware. Built to match common small-engine motorized bicycle setups, the tank is sold as a ready-to-install kit—check fitment before installing to ensure correct alignment with your frame and fuel line routing.

How do I confirm this tank fits my motorized bicycle?

Measure your existing tank dimensions and compare mounting points and outlet placement to ensure compatibility. This sthus tank is made to fit popular 49cc–80cc motorized bicycle engines, but physical confirmation prevents surprises.

• Fits: 49cc, 60cc, 66cc and 80cc engines (verify model specifics)
• Compare mounting hole spacing and bracket layout
• Confirm petcock thread orientation and fuel line routing
• Contact seller with photos if uncertain

What comes in the box and what tools do I need?

The package includes the petrol tank, a fuel tank cap and a cap switch, and a replacement petcock for a fast swap. Basic hand tools are sufficient for installation—typically pliers, screwdrivers, and a wrench to secure the petcock and mounting hardware.

• Included: 1 x 4L petrol tank, 1 x fuel tank cap, 1 x cap switch, 1 x petcock
• Recommended tools: adjustable wrench, flathead screwdriver, pliers
• Allow 15–30 minutes for removal of old tank and installation of new tank
• Inspect seals and fuel line for wear while replacing

How does the externally threaded petcock help during replacement?

An externally threaded outlet simplifies removal and attachment of the petcock, reducing installation time and minimizing the need for custom adapters. The design also makes future petcock swaps easier if you want to upgrade or replace a worn valve.

• External threads match many standard replacement petcocks
• Faster, less fiddly installation compared with internal-thread designs
• Easier to service or replace without tank modification
• Helps create a secure, leak-resistant connection when tightened properly

What maintenance or checks should I perform after installing the tank?

After installation, inspect for leaks, ensure the cap switch functions, and verify fuel flows consistently to the carburetor. Periodic checks will extend tank life and maintain safe operation of your motorized bicycle.

• Run the engine and inspect all joints for leakage
• Confirm cap switch seals and locks correctly
• Check petcock operation (on/off/reserve) for smooth action
• Replace fuel lines if hardened or cracked

Who is this for: The sthus 4L replacement petrol tank is intended for riders, mechanics, and DIY enthusiasts restoring or maintaining motorized bicycles using 49cc–80cc engines who want a straightforward, serviceable fuel tank swap. It’s suited to anyone needing a full replacement kit that includes cap and petcock hardware and who can verify physical fitment against their bike before installation.