FORT WORTH, Texas -- Robbie Knievel, decked out in his usual bandanna and blue jeans, was asked Friday how many bones he has broken in his daredevil career.

"I've broken 20 bones in my career, and I've probably been in almost as many county jails," he said. "The last one was in South Dakota. I had a feather on my rearview mirror. The police officer said it was blocking my view.

"And I also might have had a couple of drinks. But South Dakota is good about that stuff. If you don't have another violation for a year, they take it off your record."

Knievel plans to be cold sober when he attempts his jump Saturday on his 550cc, 223-pound dirt-bike motorcycle. It's the third time he has performed a jump at Texas Motor Speedway.

He will fly for 200 feet over the police cars and service vehicles on the TMS frontstretch before the start of the Firestone 550K IndyCar Series race.

The first time he jumped at TMS was over the entire IndyCar starting grid. The second time was over 20 Hummers.

This one will be his longest attempt at TMS. He did a warm-up jump Thursday night.

"I did 90 feet in practice last night,'' he said. "I don't do the full jump without getting paid. But I know [TMS president] Eddie Gossage will pay me. He's Cash Eddie."

Knievel said jumping cars on a racetrack is more difficult than other jumps.

"It's tough here because the frontstretch has 5-degree banking," he said. "But we set up my ramps to be flat, so I go from the banking to a flat ramp. It's rough, man. But I'm old-school, hard-core, hard ramps. I totally bottom out when I land."

Knievel believes there's an obvious reason people still come to see him perform his death-defying jumps after 30 years of risking his life.

"I'm getting old [47] and people think I might crash," he said. "But I love what I do. People always tell me, 'My dad brought me to see your dad [Evel].' And now they are bringing their sons. That's pretty cool."

Knievel has big plans before he calls it quits, including an attempt to complete the famous jump his father couldn't do successfully -- ride a rocket over Snake River Canyon.

''The rocket will have 5,000 pounds of thrust," he said. "I'm worried about blacking out, but I want to prove it can be done."