Early career

Barros started racing motorcycles at the age of 8, when he won on his debut in the Brazilian minibike championship. In the next two years, he was twice Brazilian moped champion. In 1981, he was the Brazilian 50cc Champion, and in 1985 he won the title of Brazilian's 250cc category. The year of 1986 saw his international début in the 80cc category—he lied about his age so he could race at the Spanish Grand Prix at the age of 15. He finished the championship in sixteenth place, scoring 6 points. In 1987, he also raced the 80cc championship, finishing seventeenth, scoring 8 points.

250cc World Championship

In 1988, Barros made his first race on the World Championship 250cc category, scoring no points. That same year, he was 3rd in the Latin American circuit of that same class. The next year, he finished 18th in the World Championship, scoring 30 points.

500cc & MotoGP World Championship

In 1990, Alex Barros was the youngest rider in history to join the top motorcycling category, the 500cc, at the age of 20. In his first year, he was 12th overall, with 57 points. Notable results included 8th in the United States and Germany, and 5th in the Belgium Grand Prix. Two years later, his first podium: a third place in the Netherlands.

The year of 1993 saw his breakthrough as he joined the Suzuki team. After qualifying third in the US Grand Prix, Barros had his first victory in Spain, finishing that year's world championship in sixth place. His teammate Kevin Schwantz was that year's champion. The following year, Barros scored in all but one of the races. 1996 saw his best performance yet, finishing the championship at fourth, a feat he repeated in 2000, 2001 and 2002. His win at Mugello in 2001,^[2] was the latest by a rider other than Valentino Rossi until 2009. In 2002, the first of MotoGP (with engine displacement capacity increased to up to 990cc) he scored 204 points and won races in Pacific and Valencia,^[3] eleven points behind second place. 2003 was a difficult one for Barros due to injuries, but in 2004, he once again finished the championship in fourth, in a season dominated by Valentino Rossi, Sete Gibernau and Max Biaggi. In 2005, Barros returned to the top of the podium in Portugal,^[4] however he did not mount a lasting championship challenge, and was not offered a ride for 2006. He returned to MotoGP in 2007, riding a Ducati GP7 for Pramac d'Antin. In pre-season testing he matched the factory Ducatis, and at midseason he was ahead of the factory rider Loris Capirossi. He came third at Mugello (ahead of Stoner) and fourth at Istanbul Park.

Superbike World Championship

For 2006 he was hired by the Klaffi Honda team in the Superbike World Championship (WSBK), paying around £100,000 of his own money to fund the ride.^[5] After a satisfactory debut weekend with two top 10 finishes, he took a pair of podium finishes at Round 2 in Phillip Island, and a second and a fourth in round four at Monza. At Brands Hatch he failed to qualify for Superpole, but bounced back from 18th on the grid to take a pair of top 10 finishes. The wet meeting at Assen was a disappointment for Barros, especially as he is a wet-weather expert.

His season was characterised by poor starts, but despite this he ended the season as the second highest Honda rider in the championship in sixth place, behind former champion James Toseland. At Imola he took his only WSBK win, and followed it with a second place in race 2.

Brazilian Superbike

After retiring from Motogp, Alex Barros is still actively racing. He is still competitive and has won several victories in the Brazilian SuperBike Championship.

Alex won the 2016 Brazilian SuperBike final riding a BMW S1000RR. Alex is known as the owner of the BMW Motorrad Alex Barros Racing Team which he formed after retiring from the world of MotoGP racing, his last work in the 2007 season. And during the final of the Brazilian Superbike series (BRSBK) he tried to compete in the last series in Sao Paolo.

In the final session of the BMW S1000RR-powered team, the team was once again able to win the championship with four podium finishes. Including when Alex himself, who holds 276 starts in MotoGP, tried to compete in that final. In race 1, Alex was second behind Diego Faustino, the BRSBK champion, and first in race 2 beating Diego by 6.8 seconds. Alex is now in 9th place in the standings after the two races of the final round of the BRSBK.^[6]

Until 2019, Alex Barros is still racing in this championship.

Suzuka 8 Hours

In 1999, Barros and Japanese teammate Tadayuki Okada won the Suzuka 8 Hours endurance race riding a Honda RC45 superbike.^[7]

Grand Prix motorcycle racing

Superbike World Championship