Corona Protocol

Access to the TT Circuit Assen is subject to the Corona Protocol
- QR code via your Coronacheck app
- negative Corona test on paper
- recovery certificate

IDC Organisation

The International Dutch Championship originated from OW Cupraces which were organized since 2013, before 2013 KNMV Cupraces were organized. In 2021 the OW Cupraces have been merged into the International Dutch Championship, the IDC championship. Due to the class structure IDC races offer participants the opportunity to develop and grow in the motorcycle race. Recreational athletes and top athletes support each other in their development.
In the International Dutch Championship the riders are divided into two classes 600cc and three classes 1000cc. All classes are separated by class limit times. Because the rider can ride in different classes, every rider experiences competition and fun at his / her own level. The lap times on the TT Circuit Assen in the different classes vary from 1.39.0 min. to 2.12.0 min.


Timekeeping, technical control, medical aspects, race control, track marshals it is all present at the IDC races. Years of experience with both the KNMV Cup- and the OW Cupraces have ensured that we as an organization know what it takes to provide an exciting and atmospheric competition.

IDC groups 2021

The classes where you can start in 2021 are:

  • Dutch Superbike
  • Dutch Supersport
  • Dutch ProClass 1000
  • Dutch ProClass 600
  • Dutch SportClass 1000

informatie open wegrace cup

IDC race license

All aspiring participants, who are not yet in possession of an IDC license but want to start in the International Dutch Championship and who have not previously held a motorcycle race license, must take a one-day CRT motorcycle race license course.
The CRT motorcycle race license course will be organized on Friday April 9th 2021 at the TT Circuit Assen.
If you have not yet taken a motorcycle race license course you can already apply for an IDC license 2021 from us and choose a start number. Of course the license is not issued until the motorcycle race license course has been successfully completed.

Noise limit

The participant is responsible that her / his motorcycle is in perfect technical condition.
IDC races are organized on type 2 and 3 days where the static noise limit of 102,9 dBA applies. Exceeding the applicable static noise limit will lead to disqualification.
In order to achieve a reduction in noise production, in addition to maximum structural damping of the intake and exhaust noise, the inside of the fearing, seat and underside of the tank should be provided with sound-absorbing, self-adhesive and flexible insulation material where possible.
Use of this material shows that resonance and sound transmission are strongly limited.