Moto2 rider Romano Fenati has been banned for two races after grabbing the brake lever of rival Stefano Manzi's bike while racing in Italy on Monday (NZ time).
The pair were side-by-side on a straight and when Fenati reached out to grab Manzi's bike, causing him to briefly lose control at speeds of around 225 km/h.
Fenati's actions followed Manzi's attempted overtake a few laps earlier. The pair had made contact as Manzi overtook on the inside, with both riders running off the track, losing several positions and dropping out of the points.
The Italian was then black flagged for "irresponsible driving" and later received the two-race ban following a review of the incident.
While some riders have accepted the two-race ban, British rider Cal Crutchlow has called for the 22-year-old to be banned from racing for life.
"He should never compete on a motorcycle again," said Crutchlow.
"He should have walked back to the garage, and his team should have just kicked him straight out the back.
"You can't do this to another motorcycle racer. We are risking our lives enough."
Fenati has a track record of controversial acts.
He was previously let go from Valentino Rossi's Sky VR46 program in 2016, with his Moto3 team suspending him for "behaviour not in line with the disciplinary rules of the team".
Fenati also kicked out at Moto3 rival Niklas Ajo and switched off his bike during practice starts in a warm-up session in Argentina in 2015.