Fabian Meharry, well-known in Echuca's BMX scene, pleaded guilty to 193 charges, mostly involving child sexual offences, in the Melbourne Magistrates Court on Friday. 

A number of offences were committed in northern Victorian towns Echuca, Nathalia and Yielima.

Meharry 27, is charged with rape, sexually penetrating children under 16, and making child pornography. He also used a carriage to procure, groom and engage in sexual activity with children.

He has been a registered sex offender since as 2011, with a number of charges involving failing to report to police that he had been in contact with children.

The amateur bike rider was also previously a part-time web developer and at one point started Magic Grinding Wax, a company that sold wax to BMX riders and skateboarders on the internet.

Magistrate Belinda Wallington said that while "much of the material is shocking" Meharry deserved some credit for pleading guilty, which ensured that his victims would not have to give evidence at a trial.

He was remanded to appear at the County Court on December 6.