TWO teenagers who were burned while performing a dangerous bike stunt at Findon were attempting the feat for the first time.

Trent Forester and Shane Bentley, both 15, were released from Flinders Medical Centre this afternoon after the pair, along with a girl, suffered burns when performing the "jump through fire" stunt at Findon Skid Kids on Reserve Parade, Findon, about 4.30pm on Sunday.

They caught fire when the flaming cardboard they jumped through failed to break up as planned and instead stuck to the riders.

Spectators used blankets to douse the flames on the riders' protective clothing.

"It was the worst pain, so hot, on fire, just horrible," Trent said.

media_camera A spectator rushes to the aid of the stunt riders after they caught fire during a jumping stunt. Picture: Facebook

"I wouldn't do this thing again, but I'm still going to be doing stunts and racing."

Shane described the fire as "really hot, so hot".

"I took the cardboard with me and that's what burned me," he said. "Heading into it I was fine, I was feeling good and didn't think it was going to be that bad."

EARLIER

SPECTATORS desperately doused flames on three teenagers when a dangerous cycling stunt went spectacularly wrong yesterday.

The two boys and a girl, all believed to be aged 15, suffered burns when performing the "jump through fire" stunt in Adelaide at Findon Skid Kids on Reserve Parade, Findon, about 4.30pm.

They caught fire when the flaming cardboard they jumped through failed to break up as planned and instead stuck to the riders.

Spectators used blankets to douse the flames on the riders' protective clothing.

media_camera Three teenagers were burned during this bike-riding stunt at Findon. Picture: Facebook

St John Ambulance crews treated the riders before SA Ambulance crews arrived and took the trio to the Women's and Children's Hospital.

A hospital spokesman would not release details on their injuries or condition without parental consent last night but their injuries were not considered life-threatening.

The fire-jump stunt was the final event of the club's 55th birthday celebration championship at the track yesterday.

Findon Skid Kids president Mick Harley said the stunt went wrong because it was incorrectly set up.

"We've been doing the fire jump for 55 years and every so often, somebody might get some burns," he said.

"The cardboard is normally in two sheets joined at the middle so it breaks when they hit it. They used cardboard that was a full sheet so it wasn't cut.

"On this particular occasion they took the cardboard with them and that's how they got burnt."

The riders were wearing protective clothing including overalls, goggles, helmets and balaclavas.

A man who also performed the stunt was unhurt.

"They are pretty well protected. It's just in this instance they took the fire with them and the heat has got to them," Mr Harley said.

The Findon Skid Kids display team gained global coverage for their stunt riding, including what Mr Harley dubbed the "world-famous fire jump" in the 1970s.

The display team ceased in 1996 but the club still performs the fire jump on some occasions, such as yesterday's birthday celebrations.

"We will be doing it again in the future," Mr Harley said.

"What we will be doing in the future is making sure (the cardboard) has the split down the centre and making sure it's done correctly."