The MXA kart team (made up of motocross racers) worked with the Speed Channel two months ago on a show called “Car Science.” It’s a one-hour program. In this program MXA test rider Willy Musgrave raced his CR125-powered kart against a 550 horsepower Ford Mustang and a 250 horsepower open wheel race car. We did this at the Orange Show Fairgrounds oval race track in San Bernardino, California.

When MXA showed up at the racetrack, we were not really sure what the “Car Science” guys were up too. We took one look at the awesome Ford Mustang, the one that won the 2010 SCCA open course championship, as it warmed up on the course and Willy was sure that it sounded and looked like it would smoke his stock CR125-engined kart. Race car driver Travis Irving was flying the Mustang around the racetrack.

Then the “Car Science” guys pulled an open-wheel race car out of a trailer and Willy thought that it was all over before it even started. Willy said, “I’ve been set up. I might as well go home.”

After watching these two race cars fly around the track it was Willy’s turn. He unloaded his shifter kart out of the back of a Nissan pickup truck, put his driving suit on and pushed started the 34-horsepower Honda CR125 shifter kart out onto the oval. Willy has won kart championship on road courses, but had never driven on an oval before. He took a couple laps to get the tires up to temperature before he started to lay down some pretty impressive times.
Who won? We can’t tell you, but we can tell you that the MXA kart team had the orangest helmets on the track.

Willy Musgrave.

To see who wins you have to watch “Car Science” science on the Speed Channel. The episode is called “The Giant Killer” and MXA‘s segment is in the middle of the show.

The show first aired Wednesday night, but can be seen on many of their reruns, inclusing 04/16 at 4:30 a.m. (EST), 04/20 at 10:30 p.m. (EST) and 04/21 at 1:30 a.m. (EST). For more info go to

cr125motocrossmxaspeed tvwilly musgrave