Kart
Cap®

Quick Release Fuel Cap

Ten seconds saved on every pit stop. One-handed operation. Zero fuel spills. Kart-Cap® replaces the screw cap that's been costing you races with a precision flip-top that locks positive and refuses to leak. Available for Righetti Ridolfi and KG tanks.

£119.99 Free UK delivery · Ships in 2–3 working days
Designed & Made in the UK
Order Now →
Kart-Cap quick release fuel cap

Engineered for Racing

01
10 Seconds Every Stop

Pull to open, push to close. One-handed operation shaves at least 10 seconds off every pit stop. The cheapest seconds you'll buy in karting.

02
Zero Fuel Spills

Fuel-resistant seal maintains a positive closure under vibration, heat, and impact. Your tank stays sealed from grid to chequered flag.

03
Tank-Specific Variants

Available in two dedicated variants: one for Righetti Ridolfi tanks, one for KG tanks. Direct bolt-on fit for the variant you choose.

04
Race Proven

Holds firm under racing vibration. Proven across RHPK, AFKC and BPEC endurance championships.

Built by a
Racer, for
Racers

Kart-Cap was designed by a professional engineer with over 20 years of karting experience. After years of losing time in the pits with standard screw caps, dropped caps, fuel spills, and fumbled threads, the decision was made to engineer a proper solution.

Development took two years of prototyping, testing, and refinement on circuit. The result has since been proven in competition for a further two years across multiple championships and endurance series.

This isn't a garage project. It's a precision-engineered product built to the standards you'd expect from a professional racing team.

Race-proven results: Winner of the RHPK and AFKC endurance championships in 2025, multiple podiums and wins in BPEC endurance across 2025 and 2026. Still taking wins in all championships through the 2026 season.

Ten seconds per stop. The cheapest seconds you'll buy all season. A fraction of the cost of chasing the same time through engine upgrades.

In the Detail

Compatibility
Righetti Ridolfi and KG kart fuel tanks
Mechanism
Positive locking push and pull retention
Seal
Fuel resistant and leak-proof
Construction
High-strength polymer body with steel hardware
Fitment
Direct replacement, no tank modification required
Installation
Straight swap, no tools required
In the Box
Kart-Cap® plus 2 adjustment washers for cap opening direction
Origin
Designed and made in the United Kingdom

Buying Multiple?

Bulk discounts available for orders of 2 or more V2 caps, with savings scaling up to 12% on quantities of 4.

Variants can be mixed. Email us with your requirement and we'll send a custom payment link.

Request a Quote

Shipping

United Kingdom
Free

Get Yours

£119.99
Free UK delivery · Ships in 2–3 working days

Engineered to a standard most OEM caps can't match. Precision-built, rigorously tested, and race-proven across multiple championships.

Sale
Righetti Ridolfi V1
First-generation Righetti Ridolfi cap. Fully leak-proof and proven. Limited stock remaining.
£119.99 £99
Order: £99
V2
Righetti Ridolfi V2
Refined seal geometry and impermeable finish for easier, more reliable closure.
£119.99
Order: £119.99
V2
KG Tank V2
Refined seal geometry and impermeable finish for easier, more reliable closure.
£119.99
Order: £119.99

Not sure which fits your tank? Get in touch

Secure checkout via Stripe

Shipping

Free UK delivery on all orders. International shipping available, contact us for a quote.

Contact

Questions about fitment, bulk orders, or shipping? We're happy to help.

hello@kart-cap.co.uk

Frequently Asked

Which tanks does Kart-Cap fit?
Kart-Cap® is available in two variants: one for the Righetti Ridolfi tank and one for the KG tank. Both are direct bolt-on replacements requiring no tank modification. V1 stock is still available for the Righetti Ridolfi tank at a reduced price while it lasts.
Not sure if it fits your tank?
If you're unsure which variant is compatible with your tank or whether Kart-Cap will fit your setup, email us at hello@kart-cap.co.uk with a photo of your current cap and we'll confirm before you order.
How does the release mechanism work?
Pull the lever to flip the cap open in a single motion. To close, push the cap down until it clicks into its positive lock. No threads, no tools, no fumbling in the pits.
Is it leak-proof?
Yes. Kart-Cap uses a fuel-resistant seal that maintains a leak-proof closure under all on-track conditions.
How do I order for multiple caps or international shipping?
For orders of 2 or more caps, or for international shipping quotes, email us at hello@kart-cap.co.uk and we'll send you a custom payment link with the correct pricing.
How difficult is installation?
Kart-Cap® is a direct swap. No tools, no modifications, no fuss. Remove your existing cap, fit Kart-Cap® in its place, and you're done. Two adjustment washers are included so you can fine-tune the cap opening direction to suit your setup.
What's the difference between V1 and V2?
V2 features a refined seal geometry and an impermeable surface finish that together deliver an easier, more reliable close. V1 is still fully leak-proof and race-proven. V2 is simply the further-refined version. V1 is offered at a reduced price while stock lasts.
Where is Kart-Cap® made?
Kart-Cap® is designed and manufactured in the United Kingdom.
How long does delivery take?
UK orders are dispatched within 2–3 working days. Get in touch for international lead times.

Reviews

Reviews coming soon. Raced with Kart-Cap®? Share your experience.