Coroner Andrew McKee said the death of a 13-year-old boy was a reminder of the need for vigilant supervision of children riding motorcycles.

The boy was born in Burnie and rode motorcycles across the North-West from a young age throughout his childhood, Mr McKee said.

He was riding with a group of teenagers on private property in November 2018 when he left the road and collided with a fence post.

"[He] was a proficient motorcycle rider. He learnt to ride his first motorcycle, a Yamaha PeeWee 50, when he was just three-years-old."

Mr McKee said the boy progressed to riding larger and more powerful motorcycles and was an "avid" and "successful competitor" at statewide competitions.

On November 17, 2018, the boy and another rider had left the group to make a small repair on his bike, and when returning to the group he rode ahead while the other rider closed a gate.

He crashed a few hundred metres away and was soon found leaning against a fencepost losing consciousness, with his motorcycle nearby.

He was taken to hospital at Latrobe, underwent surgery in Launceston and was taken to the Royal Children's Hospital in Melbourne where he died on February 3, 2019.

Mr McKee said that while he could not say if supervision would have prevented this crash, "[his] death should serve as a reminder of the necessity for those supervising children in such sports to be vigilant".

"Unfortunately, despite multiple operations, [his] condition continued to deteriorate. After consultation with his family a decision was made to stop active treatment," Mr McKee said.

"The riding of motorcycles, the recreational driving of motorcycles, and the sport of motocross, carries the risk of serious injury or death.

"[He] had taken appropriate precautions by riding a mechanically sound motorcycle and by the wearing of well-maintained and appropriate safety equipment."