A rising teenage motorcycle racing star has died just 10 days after a horrific crash left him fighting for his life with a devastating brain injury and a long list of other serious injuries.

Bayne Nantz, 17, died on the night of Sept. 1 after suffering catastrophic injuries during a Flat Track race at the Peoria TT in Bartonville, Illinois, on Aug. 22.

Nantz had been competing in the Dan Bromley Memorial, a race held in honor of another rider who died following a crash earlier this year.

The promising young racer was reportedly leading when disaster struck.

His family later revealed that Bayne suffered a severe traumatic brain injury and bleeding, along with a broken hip and pelvis, a lacerated bladder, a dislocated elbow and shoulder, and bruising to both his lung and heart.

Despite the severity of his injuries, Bayne remained alive for more than a week at OSF Children’s Hospital of Illinois as doctors and nurses desperately tried to save him.

His family described the agonizing ordeal as “the worst experience of our lives,” revealing they were forced to say goodbye to the teenager multiple times as his body nearly gave out.

“Last night, that injury finally took him from us,” his family wrote in an emotional statement posted to the Nantz Bros Racing Facebook page.

“This last week and a half has been the worst experience of our lives, and it put us through hell. We said goodbye more than once, as his body nearly gave up several times.”

The family praised the hospital staff who worked around the clock to care for Bayne, but said the damage to his brain was ultimately too severe.

“The hospital staff here have worked around the clock to try to save this kind, caring, talented little man, but the insult to his beautiful brain was too much,” they wrote.

In one final act of generosity, Bayne’s family decided to donate his organs through Gift of Hope.

“Anyone who knows Bayne will agree that this is exactly what he would do if he could have the say,” the family said.

Bayne had already been emerging as one of the most promising young names in American Flat Track racing.

Just months earlier, in May, American Flat Track declared that “Bayne Nantz is a name to remember” after he won the AFT ProSport 450 ThrottleFest race.

His racing ambitions stretched back years.

A GoFundMe created when Bayne was only 13 said he dreamed of becoming a professional racer in the American Flat Track Series and had already shown the “natural ability to make that reality.”

His family said the Peoria TT had been one of the biggest moments of his young racing career.

Before the crash, Bayne was “on cloud 9” after qualifying second.

“He was as proud of himself as we were of him,” his family recalled. “He came back from the last qualifying session with a smile on his face, and said, ‘I feel good, I’m gonna win today.’”

The family later learned that one of Bayne’s final memories was pulling up to the starting line and looking toward the hillside, where supporters wearing Bayne “the Train” shirts had gathered to cheer him on.

Bayne waved toward them before getting a strong start.

“We take comfort in knowing that he was surrounded by people that love him, and he knew in that moment how big his fan club really is,” his family wrote.

They said Bayne was now “looking down from Heaven” and seeing just how many people cared about him.

The family remembered the teenager not only as a fearless racer, but as a kind, funny and talented young man who loved building things, spending time outdoors and being with his family.

“He did the most badass things on a motorcycle, could swing an axe for hours and build a viable shelter at 11,000ft up the mountains, build you a bookshelf with his calloused miniature man hands, and yet he still blew mom and dad a kiss every single day from the school bus window as it drove away,” the tribute said.

His loved ones recalled late-night snuggles while watching “Seinfeld,” fishing trips filled with jokes, working on projects together and even the mundane moments spent doing motorcycle maintenance.

They also remembered watching Bayne detail neighborhood cars so he could save money for an electric dirt bike.

“What else would he spend his money on?” they joked.

“Bayne was special, tough, wise beyond his years, and somehow still sweet and innocent, and just so damn cool,” the family wrote.

They described him as “perfect, kind, generous, loving, gentle, intelligent, creative, talented, goofy, hilarious” and said they were proud to have been part of his tragically short life.

“You made everyone around you smile, and reminded everyone that there is still good in this world,” the tribute continued.

“You didn’t know a stranger, and you made the people around you happy, without even trying.”

American Flat Track also paid tribute to the young racer following news of his death.

“AMA Pro Racing and the American Flat Track community mourn the passing of AFT ProSport 450 competitor Bayne Nantz,” the organization wrote.

“Our deepest condolences are with Bayne’s family, friends and fellow competitors.”

The Peoria Motorcycle Club, where the fatal crash occurred, also shared its condolences.

“Our deepest condolences to the Nantz Bros Racing family,” the club wrote. “Your Peoria Motorcycle Club family is keeping you close in our thoughts and prayers.”