Ash Stuart: died after an accident on a private track.

Ash Stuart: died after an accident on a private track. Photo: Facebook

The family of a motocross rider who died in a crash at a private track in central NSW have paid tribute to him, saying: "We will never stop loving you and being proud that you belonged to us."

Friends have also paid tribute to Ash Stuart, 28, who suffered fatal head injuries in a jump gone wrong near Mudgee on Saturday morning.

"As a male there are not many men in your life u can say that u truly loved but Ash Stuart was one of those men in my life," wrote one friend, Ricky Bush.

The Louee Enduro and Motocross Complex.

The Louee Enduro and Motocross Complex. Photo: Supplied

He said Mr Stuart was his best friend, the best man at his wedding and the godfather of his child.

"I will miss u for the rest of my life. I will see u on the other side my brother. LOVE YOU."

Mr Stuart, an experienced motocross rider, was riding at the Louee Enduro and Motocross Complex in Lue, about 30 kilometres east of Mudgee, when he attempted a jump about 11.30am on Saturday.

"We will never stop loving you.": family have paid tribute to Ash Stuart.

"We will never stop loving you.": family have paid tribute to Ash Stuart. Photo: Facebook

Police were told that Mr Stuart, from Muswellbrook, fell off his bike during the jump and landed on his head.

Other riders tried to help him before paramedics arrived, but he died at the scene.

Mr Stuart had ridden at the private track, which is on a working sheep and cattle property, many times before, and his death sent shockwaves through the motocross community.

He was a member of the Upper Hunter Motorcycle Club, which also paid tribute to him on social media.

"RIP to Ash Stuart, a great member and helper of UHMCC Inc. Passed away doing what he loved, he will be sorely missed," the club wrote.

Mr Stuart's aunt, Jen Stuart, urged everyone to live life to the fullest following her nephew's death.

"RIP Ashley Paul Stuart. We will never stop loving you and being proud that you belonged to us our beautiful nephew," she wrote on social media.

Other riders said Mr Stuart had ridden at the motocross complex many times before, and that it was a safe place to ride.

The complex's website says that all riders and spectators are required to sign a waiver before tackling the five motocross tracks or 150 kilometres of tracks and trails.

"We do everything we can to make your ride here at Louee a safe one, however, every rider rides at their own risk," the website says.

"Motorcycle riding is dangerous, plan to have a safe ride don't just hope it will happen."

Police will prepare a report for the coroner.

They have urged anyone with information about the crash to contact Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page.