An eight-year-old Western Australian boy has left with horrific injuries after a quad bike accident in Bali.

Josh Schuetz was on the island with family and friends to compete in a football tournament, when the tragedy unfolded.

Close family friend BJ Ariasa, who is also in Bali, said the accident was ‘unimaginable’.

“Joshy had the most unimaginable accident yesterday while quad biking in Ubud in Bali just days before the tournament we all came here for,” she explained on a GoFundMe appeal, which has raised almost $80,000.

She told 9News that the quad bike Josh was riding with his older brother flipped.

“They had helmets on, they weren’t going fast, it was a supposedly safe environment to be in.

“He sustained a fractured skull and brain bleed and was taken to hospital. Hospital in Bali is extremely expensive. To be looked at his parents needed to transfer $20,000 AUD deposit on the spot for just half of the bill.

“He was then transferred to another hospital with a neurosurgeon and ICU unit where they have to pay a further $10,000 AUD deposit for a blood transfusion. So far the bill is $60,000 AUD but climbing by the hour that he is in hospital here. Insurance is only covering medical evacuation (a huge help) but not the hospital costs. He has had surgery last night and the cost of this is unknown. He is in stable condition but in a coma.”

BJ says a team of Australian doctors and nurses are on their way to airlift Josh to Perth.

“We want Joshy to be back to normal so we want to help him get there in whatever way possible. Hundreds of prayers are over our sweet, funny, full of life Joshy. We just want him safe and healed.”