Really happy with the product. Took a while to get my order but they were out of the spark plug cables I ordered. I had to email and inquire what the deal was. They were super helpful once I initiated communication. Would have been cool to get some swag or something since they took so long. But the relocator is great. I really love it. And they responded promptly once I reached out to them. Their customer service is truly fantastic.
Auxiliary Gas Tank Kit for Harley-Davidson Sportster (2004–2022) | 3L–5L Bolt-On Extended Fuel Reserve
TRENDING
$225.00
Premium auxiliary gas tank kit designed for Harley-Davidson Sportster motorcycles (2004–2022). Adds 3L or 5L of reserve fuel capacity to extend riding range by approximately 45–70 miles. Made in the USA and engineered as a fully bolt-on solution with no cutting or drilling required.
Kinetic Motorcycles
USA Designed & Made
Worldwide Shipping
High Precision Motorcycle Parts
Product Information
The Kinetic Auxiliary Gas Tank Kit is designed to provide additional fuel capacity for Harley-Davidson Sportster models without modifying the stock fuel tank, frame, or paint. This auxiliary fuel tank functions as a reserve system, allowing riders to carry extra fuel for longer routes, touring, or remote riding conditions.
Manufactured in-house in the USA, each tank is constructed from laser-cut steel and mounts using a secure 4-point bracket system. The kit installs with basic hand tools and integrates cleanly with stock, lifted, or custom Sportster gas tank setups.
Finish options include black or red powder coat, with optional heat shield protection and custom laser engraving available.
Specifications
Capacity Options
3 Liter (0.75 Gallon)
5 Liter (1.3 Gallon)
5 Liter (1.3 Gallon)
Added Range
Approx. 45–70 miles
(depending on capacity and riding conditions)
(depending on capacity and riding conditions)
Material
Laser-cut steel tank
Stainless steel mounting hardware
Stainless steel mounting hardware
Finish Options
Black powder coat
Red powder coat
Red powder coat
Mounting Style
Bolt-on 4-point bracket
Installation Time
Approximately 15–20 minutes
Reversible
Yes
Made In
USA
Features
- Bolt-on auxiliary gas tank designed specifically for Harley Sportster models
- Adds reserve fuel capacity without altering the stock motorcycle gas tank
- Secure 4-point mounting system for stable installation
- No drilling, cutting, or welding required
- Compatible with stock, lifted, and custom Sportster tank configurations
- Optional aluminum heat shield for exhaust-side protection
- Optional custom laser engraving
- Compact and lightweight design
Fitment
Iron 883 (1995–2018+)
Nightster (1995–2018+)
Forty-Eight (1995–2018+)
Seventy-Two (1995–2018+)
Roadster (1995–2018+)
1200 Custom (1995–2018+)
Model Notes:
- 1995–2003 carbureted models: No choke relocation required
- 2004–2006 EFI models: Integrated choke-relocation bracket included
- 2007–2018+ EFI models: Coil and key installation follows reference configuration
- Optional rear tank lift risers may be required for additional clearance on pre-2003 models
Why Choose
Extends riding range without replacing the main gas tank
Cleaner alternative to carrying fuel bottles
Designed specifically for Sportsters — no universal fit compromises
Works seamlessly with custom and factory tank setups
Durable construction suitable for daily riding and long tours
Made in the USA with precision manufacturing
FAQs
How much additional range does this tank provide?
Approximately 45–55 miles with the 3L tank and 60–70 miles with the 5L tank,
depending on riding conditions.
Is any modification required?
No. This is a fully bolt-on kit with no drilling, cutting, or welding required.
Does this fit the Forty-Eight model?
Yes. The kit fits all 2004–2022 Harley-Davidson Sportster models,
including the Forty-Eight.
Do I need the optional heat shield?
The heat shield is recommended if your exhaust routing sits close
to the mounting area.
Can this be used on custom builds?
Yes. Many custom Sportster and chopper-style builds use this kit
as an auxiliary fuel tank solution.
Designed & Built in the USA
Every Kinetic product is designed and manufactured in the United States. Keeping our work in-house allows us to control quality, refine fitment, and stand behind every part we make.
A Decade of Hands-On Experience
Founded in 2013. A decade of machining, installing, riding and refining components on real bikes — not just in a lab. That experience shows in the quality of every part we ship.
Designed by Riders & Builders
Every product is shaped by hands-on building and riding experience, with practical decisions made where it matters most.
Innovation Meets Passion
Made in the USA
Founded in 2013 by Mike Le, Kinetic Motorcycles was built on a simple belief: motorcycle parts aren't generic hardware — they're personal. Every product begins as an original idea, designed by Mike and developed entirely in-house.
We don't rely on templates or outsourced shortcuts. Each part is shipped by hands-on fabrication experience and time spent riding, testing, and refining. Whether you're dialing in a daily rider or building something truly your own, our focus is the same — create parts that feel intentional, functional, and worthy of your motorcycle.
What Our Customers Say
I had some questions on some bars, so I DMd them on Instagram. The dude I talked to was super helpful. I purchased the shirt because of his response. I’ll rep the brand due to the customer service.
Precision-machined and bolt-on perfect. Took 30 minutes to install and the difference is night and day.
Customer support answered my DMs within an hour. Shipping was on point, packaging was premium.
Customer Reviews
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