Spinner KustomTech brass petrol cap: the epitome of old-school style
There are certain parts that define the style of a custom motorcycle, and this KustomTech polished brass Spinner gas cap is definitely one of them. When you screw it onto your tank, it's like putting the cherry on top of an already beautiful cake. This little golden gem catches the sunlight and instantly gives your Harley an incredible look.
Solid brass machined from a solid block
No cheap imitations here; we're talking genuine billet brass, CNC-machined in the KustomTech workshops in Italy. The Spinner profile with its distinctive fins isn't just for looks: it provides a perfect grip for screwing and unscrewing the cap, even with gloves. The mirror-polished finish brings out all the natural warmth of brass, this noble metal that develops an elegant patina over time.
Right-hand thread and ventilated
This model features a right-hand thread and is vented, which is essential for proper fuel supply. The vent allows air to enter the tank as fuel is consumed, preventing vacuum problems. This cap is designed for the right side of the tank or for tanks with a single cap.
Harley-Davidson compatibility
Compatible with all Harley-Davidson tanks from 1982 to present with standard threading. Whether you ride a Sportster, Dyna, Softail, or FXR, this Spinner cap screws on directly without any modifications. It pairs perfectly with the Spinner oil filler cap from the same line for a cohesive and refined look across your entire motorcycle.
Technical characteristics
Material: CNC machined billet brass. Finish: Mirror polished. Thread: Right-hand. Vented: Yes. Compatibility: Harley-Davidson 1982 and later. Part number: 10-020. Made in Italy by KustomTech.
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Technical specifications — Spinner KustomTech polished brass vented right-hand thread gas cap for Harley 1982+
- Brand: KustomTech (Italy)
- Material: Brass
- finish: Poli
- Manufacturing: CNC machining from solid stock (Italian workshop)
- Official distributor in France: Holdfast Marseille
- Shipping time: 48 hours from Marseille
Compatibility of Harley Davidson fuel and oil caps
Compatible with all Harley Davidson models: Sportster 883/1200 (1991+), Dyna, Softail, Touring (Road King, Street Glide). For Touring models with a lock or Tour Pak, please check the exact model on the product page.
Installation
Direct plug: unscrew the old cap, screw in the KustomTech. For weld-on caps, a mini welder on the tank is required (typically 30-45 minutes at a specialist).
FAQ — Fuel and oil caps
Is it waterproof?
Yes. High-density nitrile rubber O-ring + precision machined threads = not a leak. E10 fuel and 4-stroke engine oil resistance tested.
Is the thread compatible?
Standard Harley Davidson thread (left-hand thread for the fuel cap on most models). Check the exact model on the product page before ordering.
Difference between screw-on and weld-on?
The screw-on cap = 30-second installation, plug-and-play. The weld-on cap = total customization, requires welding on a custom tank (chopper bobber).
Why buy from Holdfast Marseille?
- Official distributor of KustomTech France since 2019
- Permanent stock in Marseille, 48-hour shipping within mainland France
- Free delivery on orders over €150
- Responsive customer service from Marseille (no returns from Italy)
- KustomTech 2-year warranty
- Expert biker advice: call +33 6 45 57 84 26
Fabien D. –
The threading is perfect; it screws smoothly onto my 2005 Softail tank. The polished brass is really classy, much nicer than chrome in my opinion. The only downside is the slightly high price, but the quality is definitely there.
Thierry G. –
This brass Spinner cap is absolutely gorgeous. When the sun hits it, it shines like gold. I put it on my Dyna, and with the matching oil cap, it makes an awesome set. The ventilation works perfectly too.
Sébastien L. –
Ordered at the same time as the left-side fuel cap and the oil filler cap, the trio looks absolutely stunning on my Fat Bob tank. Brass is truly the epitome of class.
Jake W. –
Beautiful brass cap, fits perfectly on my 1994 Sportster. The Spinner design gives such a classic look. Really well machined piece, you can feel the quality when you hold it.