The Grand Prix Commission has announced an update to the MotoGP Technical Regulations, effective immediately, allowing riders to use 340mm front brake discs at any circuit they choose. Previously, rules stated that use of the larger disc was mandatory at Motegi (a provision which remains intact) and optional only at Sepang and Catalunya (Montmelo). According to the FIM press release, included in full below, the Commission was compelled by safety concerns in making its decision. – MotoUSA.
The Grand Prix Commission, composed of Messrs. Carmelo Ezpeleta (Dorna, Chairman), Ignacio Verneda (FIM Executive Director, Sport), Herve Poncharal (IRTA) and Takanao Tsubouchi (MSMA) in the presence of Javier Alonso (Dorna) and Mike Trimby (IRTA, Secretary of the meeting), in an electronic meeting held on 22 May 2014, made the following decision:
The Commission unanimously decided, in the interests of safety, to modify the regulation concerning the front carbon disc brake sizes in the MotoGP class.
Currently the regulations permit two sizes of front carbon discs; 320 mm discs must be used at all circuits except at Motegi where the use of 340 mm discs is mandatory and at Montmelo and Sepang where use of 340 mm discs is optional.
Following a recommendation from the Safety Commission and with the support of the brake manufacturers it has been decided that the use of 340 mm disc brakes will be optional for all circuits with the exception of Motegi where such use remains mandatory.
A regularly updated version of the FIM Grand Prix Regulations which contains the detailed text of the regulation changes may be viewed shortly on: