A 14-year-old Noongar boy says he was rammed, chased and racially abused by a motorist in Perth's north-east last month, in an incident his family says has left him injured and traumatised.

The boy, Kaiden Whitby, had been riding his motorbike through bushland near Ellenbrook on December 26, a route his family says he takes most evenings at dusk.

When the trailer usually used to transport the bike home was unavailable, Kaiden briefly rode on a nearby road.

But on the public holiday, the trailer was unavailable, and he briefly rode on the road near an oval on Coolamon Boulevard.

It was there, Kaiden alleges, that a white car moved in close to him as he was riding.

"He noticed the guy driving came really close, but he kept riding," his sister, Justine Whitby, told National Indigenous Times, speaking on her brother's behalf.

"Then he heard the car speeding up. He turned around and, at that moment, the man accelerated.

"The car went into the back of his bike, Kaiden lost control and fell, hitting the pavement."

At first, the high school student thought the collision must have been an accident.

That assumption was quickly shattered when the driver allegedly got out of the car and chased him, brandishing a pole.

Assailant allegedly shouted racist slurs

Pushed by sheer adrenaline, Kaiden ran as the man allegedly yelled racial slurs at him - including calling him a Black c*** - and accused him of stealing the motorbike.

As Kaiden fled into the bushland, the man grabbed the bike and began walking it back towards his car, according to Kaiden's account.

WA Police, however, say officers were called to Coolamon Boulevard about 6.35pm following reports a juvenile rider had lost control and crashed near the oval.

"Police said the driver of a white Ford Territory station sedan stopped at the scene, where it is alleged he was confronted by the occupants of another vehicle, who attacked his car and smashed the front passenger window.'

Ms Whitby confirmed Kaiden believes the young men witnessed the incident and responded by yelling at the driver over his alleged actions towards the 14-year-old.

She said Kaiden did not know them.

"Ellenbrook is one of those places where once you've lived there long enough, you recognise faces, but you don't know people personally," she said.

When Kaiden realised he had outrun the man, he called his sister for help.

She ran to the scene with a padlock to ensure the man would not take the family's motorbike.

Boy suffered several serious injuries

The force of the collision left Kaiden with two broken ribs, multiple cracked ribs and a dislocated shoulder.

The driver of the white car asked police to check whether the bike was stolen. Ms Whitby says WA Police confirmed the motorbike was not stolen and belongs to Kaiden's mother.

Ms Whitby alleges police treated Kaiden's alleged assault as a lower priority in their investigation.

"Their initial focus was that Kaiden was riding on the road," she said.

"We assured police we don't condone that whatsoever, and he got in very big trouble with us for it."

She also claims police concentrated on whether the young men who allegedly smashed the car window were known to Kaiden.

"We told police numerous times we don't know who those boys are," Ms Whitby said.

"They weren't happy to take our statement at first. We had to go back to the police station twice, and it was only the third time they took his statement.

"They were trying to deter us from making a statement until they had CCTV footage. I'm not sure why, but we made it clear that no matter what, we wanted our own statement taken so what happened to Kaiden would be on record."

Ten days on - no charges pressed

National Indigenous Times asked WA Police why no charges had been laid against the man alleged to have struck the child with his vehicle and threatened him, but had received no response to this question by the time of publication.

Police said the matter remains under investigation and are urging anyone who witnessed the Boxing Day incident in Ellenbrook, or has relevant information, to contact Crime Stoppers.

The alleged incident has re-awakened trauma the family experienced as members of the wider Indigenous community following the murder of Cassius Turvey.

"After what happened to Cassius, Kaiden didn't want to walk to school anymore," Ms Whitby said.

In October 2022, 15-year-old Cassius Turvey was walking home from school with friends in Perth's north-east when a group of men approached them in a utility vehicle and gave chase. Cassius was caught and beaten with a metal pole, suffering catastrophic head injuries. He was hospitalised and later discharged but collapsed hours later after suffering a seizure and was placed in an induced coma following emergency brain surgery.

Cassius died ten days after the assault, sparking widespread grief and vigils across Australia.

Two men, Jack Brearley and Brodie Palmer, were convicted of Cassius Turvey's murder last year and sentenced to life imprisonment. At sentencing, Chief Justice Peter Quinlan acknowledged the use of racial slurs during the attack on Cassius and others, and that the victims' perception of being targeted because they were Aboriginal was "real and legitimate".

Cassius's mother Michelle Turvey told the court she viewed her son's killing as racially motivated vigilantism, saying racial vilification was part of what made the attack so traumatic.