Tillotson Carburetor HW-52A OKN 2026

Carburetor Tillotson HW-52A (D.24) – OK-N / OK-N Junior (Homologation 2026)

The new standard for the OK-N categories.
The diaphragm carburetor Tillotson HW-52A represents the latest technical evolution for the single-speed OK-N and OK-N Junior classes. Developed to ensure maximum performance consistency, this model has been updated with the new homologation 042-CA-21, mandatory for official competitions in the 2026 cycle.

Performance and Reliability
The HW-52A retains the proven 24 mm Venturi diameter, offering linear power delivery and extremely precise throttle response. Designed to maximize airflow and optimize mixing at all speeds, it is the ideal choice for drivers seeking maximum performance without compromising carburetion stability.

Total Compatibility
Despite the regulatory update, Tillotson has maintained full backward compatibility with the previous HW-49A model. This means you can continue using all your current spare parts (diaphragms, gaskets, screws, and needles), reducing the management costs of your racing kit.

Technical Specifications:

• Model: HW-52A
• Application: OK-N, OK-N Junior
• Homologation: CIK-FIA 042-CA-21 (Valid until 2026)
• Venturi Diameter: 24 mm
• Material: High-strength die-cast aluminum
• Configuration: 2 screws (High & Low) for micrometric adjustment
• Compatible Revision Kit: RK-2HW (Diaphragms and gaskets DG-3HW)

Why choose it:
It is the essential update for those competing at the highest national and international levels, ensuring compliance with the latest technical regulations with the quality guarantee of Tillotson Racing.