Early career

Pasini participated in his first race at the age of 9.^{[citation needed]} In 1998, aged 13, he suffered a serious motocross accident that left him with several broken bones and permanent nerve damage in his right arm.^[1][2]

125cc World Championship

After several successful years in the Italian and European championships, he made his 125cc world championship debut in 2004 as the teammate of Roberto Locatelli. He finished his first season in the 15th place overall, and earned the rookie of the year award. His best results were a 3rd place in Qualifying and a 7th place in the Malaysian Grand Prix.

The following year Pasini was running in the lead in most of the races and won the Chinese and Catalan Grands Prix. He finished the season in fourth place overall. In 2006 Pasini finished fourth overall once again, having won the Italian Grand Prix and the German Grand Prix.

The 2007 season started very badly as Pasini suffered from motorcycles malfunctions early in the year. That lowered his chances of winning the championship. Despite having four wins, one more than the championship leader Gábor Talmácsi and as many as the runner-up Héctor Faubel, Pasini ended the year in fifth place.

250cc World Championship

In 2008, Pasini rode in the 250cc class for Polaris World Aprilia team. He gained his first 250cc victory in the opening round of the season during the Qatar Grand Prix and secured three more podium finishes in the first five rounds. However, he failed to maintain such form and finished no higher than fifth in the remaining races. He finished the season 8th overall and was the rookie of the year.

2009 Pasini was victorious at Mugello, but generally struggled to match the frontrunners.

In 2009 he got a chance to test a Ducati MotoGP bike for Pramac Racing in order to evaluate him as a replacement for Mika Kallio who in turn replaced Casey Stoner at Ducati works team.^[3] After the test however, it was decided he would not be racing for Pramac in 2009.^[4]

Prior to the Portuguese Grand Prix in Pasini was forced to find a new team due to issues with Team Toth ability to pay for the leasing of bikes from Aprilia. This led to Daniel Epp assisting Pasini in financing the lease of bikes for the remainder of the season under the banner of Team Globalgest. The team acquired all of Pasini's mechanics from Toth and raced from the Emmi – Caffe Latte teams garage for the remainder of the season.^[5]

MotoGP World Championship

In January 2012, it was announced that Pasini was going to make the step up to MotoGP with the Speed Master team,^[6] replacing Anthony West, as he could not acquire the funds to retain the ride. He rode an Aprilia ART CRT bike. At Assen he achieved his best result with 10th place.

Return to Moto2

In 2015, Pasini was left with no full time ride. That year he adapted to tarmac racing bikes a system that he previously invented for motocross, that transfers front braking to the left arm, due to permanent nerve damage on his right arm.^[7] He has used this system in Moto2 ever since. In 2016, Pasini made a full-time return to Moto2, racing a Kalex for Italtrans Racing. He closed the season in eleventh place in championship, having scored 72 points. In 2017, Pasini won his first race in 8 years at the Italian GP, and finished in sixth position in the championship. He finished ninth in the championship in 2018, having won a race at the Argentine GP. He was left without a full time ride again in 2019.

Sportscar racing

Pasini made his four-wheel debut with Inter Europol Competition racing a LMP3 class Ligier JS P320 in the 2021 European Le Mans Series at the 4 Hours of Barcelona.^[9]

Grand Prix motorcycle racing

CIV National Championship