A Victorian amateur BMX rider has admitted to 193 child sex charges including rape, causing a child to perform a sexual act with a dog and producing child pornography.

Key points: Fabian Meharry pleads guilty to 193 charges including producing child pornography

Fabian Meharry pleads guilty to 193 charges including producing child pornography Offences occurred in country Victoria and Melbourne

Offences occurred in country Victoria and Melbourne Meharry helped resolve case against him, Magistrate says

Fabian Roy Meharry, 27, entered a single guilty plea in the Melbourne Magistrate's Court to all charges against him, which include using a carriage service to groom girls under the age of 16 for sexual activity.

The offences occurred between 2007 and 2015 at a number of places in Melbourne and country Victoria, including Echuca and Fitzroy.

The ABC has been told Meharry was well-known on the local BMX scene in the northern town of Echuca.

It is understood the amateur rider spoke of plans to set up his own company selling bike parts and accessories.

Magistrate Belinda Wallington praised the prosecutor and Meharry's defence lawyer for working hard and thoroughly to prepare for the plea hearing.

She also acknowledged Meharry's cooperation in the case and said he would receive a lesser sentence in return.

"Although a lot of the material is quite shocking, you also deserve credit for your effort in resolving it," she said.

Meharry will face court again in December to be arraigned in the County Court ahead of his sentencing.