Gas oil caps
KustomTech fuel and oil caps replace your stock caps with stylish machined parts that immediately catch the eye on your tank or crankcase. Each cap…
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The KustomTech fuel and oil caps They replace your stock caps with elegant machined parts that catch the eye at first glance on your tank or crankcase. Each cap is machined from a solid block ofaluminum or brassThen polished, anodized or chromed depending on the finish. A cockpit detail, but a detail that makes all the difference on a photo-friendly bike.
The Deluxe KustomTech range offers earplugs for:
Fuel tank — Threads compatible with Harley-Davidson (Sportster, Dyna, Softail) and American customs, with integrated vent
Oil pan — matching filler caps
All plugs are available in the following finishes polished aluminum, black anodized aluminum, polished brass, chrome, to perfectly match the rest of your Deluxe set: handles, risers, master cylinders.
Shipping within 48 hours From our Marseille workshop, free delivery on orders over €150 in mainland France, secure payment, free returns within 14 days. To check thread compatibility with your tank, contact us with your part number or a photo — we'll respond quickly.
Custom Fuel and Oil Cap FAQs
How to choose a custom Harley fuel cap
First, check the diameter of your tank (most Harleys have a standard left-hand thread). Then choose the finish: polished aluminum for shine, matte black for the bobber blackout look, or brass for a vintage look that develops a patina over time.
Does the KustomTech cap really seal properly?
Yes. High-density nitrile rubber O-ring + precision-machined threads = not a drop of gasoline. Tested with E10 fuel and 4-stroke engine oil. No maintenance required.
Which Harley models are compatible with?
Sportster 883/1200, Dyna, Softail, Touring (Road King, Street Glide). For Touring models with a lock (Tour Pak), check the exact model on the product page.

The world of Gas oil caps
The KustomTech fuel and oil caps They replace your stock caps with elegant machined parts that catch the eye at first glance on your tank or crankcase. Each cap is machined from a solid block ofaluminum or brassThen polished, anodized or chromed depending on the finish. A cockpit detail, but a detail that makes all the difference on a photo-friendly bike.
The Deluxe KustomTech range offers earplugs for:
Fuel tank — Threads compatible with Harley-Davidson (Sportster, Dyna, Softail) and American customs, with integrated vent
Oil pan — matching filler caps
All plugs are available in the following finishes polished aluminum, black anodized aluminum, polished brass, chrome, to perfectly match the rest of your Deluxe set: handles, risers, master cylinders.
Shipping within 48 hours From our Marseille workshop, free delivery on orders over €150 in mainland France, secure payment, free returns within 14 days. To check thread compatibility with your tank, contact us with your part number or a photo — we'll respond quickly.
Custom Fuel and Oil Cap FAQs
How to choose a custom Harley fuel cap
First, check the diameter of your tank (most Harleys have a standard left-hand thread). Then choose the finish: polished aluminum for shine, matte black for the bobber blackout look, or brass for a vintage look that develops a patina over time.
Does the KustomTech cap really seal properly?
Yes. High-density nitrile rubber O-ring + precision-machined threads = not a drop of gasoline. Tested with E10 fuel and 4-stroke engine oil. No maintenance required.
Which Harley models are compatible with?
Sportster 883/1200, Dyna, Softail, Touring (Road King, Street Glide). For Touring models with a lock (Tour Pak), check the exact model on the product page.
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