International Dutch Championship

The IDC Championship 2023 will be held in 2 classes 600cc and 2 classes 1000cc, click this link for the technical regulations: technical regulations IDC
Classes are separated from each other by class-limit times, the reference is the fastest lap time on the TT Circuit Assen on a dry track
New to the 2023 IDC Championship is the Dutch Naked Bike class, click this link for the technical regulations: technical regulations Dutch Naked Bike class

Classification IDC classes 2023

Dutch ProClass 600: from 15 years - laptime between 1.54.0 - 2.12.0 min.
Dutch Supersport: from 15 years - laptime faster than 1.53.9 min.
Dutch ProClass 1000: from 17 years - laptime between 1.52.0 - 2.12.0 min.
Dutch Superbike: from 17 year - faster than 1.51.9 min.
Dutch Naked Bike: from 15 years - laptime faster than 2.12.0 min.

International Dutch Championship


To participate in the International Dutch Championship you need an IDC license. This can be either a year license or a day license. With a day license you can participate in a maximum of 3 IDC races per year and participate in the IDC Endurance on the TT Circuit Assen. Riders holding a valid license from a foreign association must apply for an IDC day- or IDC year license to participate in IDC races.
To obtain an IDC license you can apply via this website. If you have not previously had a motorcycle race license, or have not ride motorcycle races for 3 years, you need to follow a motorcycle race license course. CRT organizes its motorcycle race license course on Thursday 6th and Friday April 7th 2022 at the TT Circuit Assen for the first IDC race of the season on Saturday April 8th 2023.
The CRT motorcycle race license course consists of 5 practical sessions alternated by theory sessions plus a written theory exam with questions about the flag codes.


Wearing a solid leather one-piece racing overall, back protector, leather gloves and leather racing boots which are provided with good ankle protection are mandatory during the CRT motorcycle racing license course. In addition, you must wear a helmet of the integral type and it must be provided with the ECE.22.05 or ECE.22.06 quality mark and a double D-closure.


The registration fee for IDC races has to be paid to the organizer 3 weeks before the event according to the payment method chosen at the time of registration.
In case a direct debit is chosen, this will take place 3 weeks before the event.
Payment is confirmation of registration.
Registrations of IDC year licences will take priority over registrations of IDC day licences until 3 weeks before the event.
If races are cancelled due to force majeure (bad weather, oil on the track, etc.), no refund will be given by the organiser.

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