J&P Cycles Standard 2.4 Gallon Gas Tank For Harley Sportster 1957-1978

J&P Cycles Standard 2.4 Gallon Gas Tank: The Heart of the Ironhead Sportster

Bring your vintage Ironhead back to life with the J&P Cycles Standard 2.4 Gallon Gas Tank. Engineered specifically for 1957–1978 Harley-Davidson Sportster (XL) models, this tank is a faithful reproduction of the legendary “Peanut” tank that defined the look of the post-war American cruiser. Whether you are tackling a full Harley-Davidson restoration or simply replacing a rusted, dented original, this tank provides the authentic profile and chassis reliability required for classic V-Twin performance.

Heavy-Duty Steel Construction and Mechanical Precision

Quality is paramount when dealing with vintage fuel systems. The J&P Cycles replacement tank is manufactured from heavy-gauge, deep-drawn steel for maximum durability and resistance to vibrations. Every seam is precision-welded to ensure a leak-free chassis service upgrade. The tank features a 22mm threaded petcock bung on the right side and a traditional bayonet-style (cam-lock) filler neck, adhering to the mechanical precision of the original Ironhead Sportster specifications. The underside is designed for a perfect bolt-on fit over the backbone of the 1957–1978 frames.

The Iconic Peanut Silhouette

The 2.4-gallon capacity is the “sweet spot” for Sportster aesthetics, offering a slim, narrow profile that exposes the massive Ironhead V-Twin performance engine underneath. This tank is the preferred choice for Stage 1 styling upgrades on vintage bobbers and choppers, providing that “slammed” look without the bulk of larger touring tanks. The raw steel finish arrives ready for prep and custom paint, allowing you to recreate a factory AMF-era paint scheme or go with a completely custom chassis styling upgrade.

Fitment and Compatibility

This tank is designed specifically for the frame geometry of early Sportsters. Confirmed fitment includes:

• Sportster XL / XLH / XLCH: (1957–1978).
• Custom Builds: Fits many custom hardtail and swingarm frames that utilize a single-backbone mounting style.
• Note: Not compatible with 1979-later frames due to changes in the backbone and mounting bracket locations.

Preparation for V-Twin Performance

As with all aftermarket Harley parts involving fuel, proper preparation is key. This tank is shipped in raw steel to prevent hidden rust under paint; however, we strongly recommend using a fuel tank sealer kit before final installation. Sealing the interior provides an extra layer of surface protection against modern ethanol-blended fuels and ensures long-term chassis stability. Always pressure test the tank before applying custom paint to ensure a flawless finish for your Harley-Davidson maintenance project.

Installation and Care Tips

Installing the J&P Cycles gas tank is a direct process, but we recommend using new rubber mounting grommets and high-quality chrome fasteners to prevent stress cracking from engine vibration. During your Harley-Davidson service, ensure the petcock is installed with fuel-resistant thread sealant. To keep the exterior looking its best after painting, use a high-quality wax to protect the finish from fuel spills.

Restore the classic lines of your vintage XL. Order the J&P Cycles Standard 2.4 Gallon Peanut Tank today and hit the road with authentic Ironhead style!