For 2018, as well as competing in the Rookies Cup, both Can and Deniz joined Ajo Motorsport and also raced in the FIM CEV Moto3 Junior World Championship. Later that year Can became the first rider to win on his Grand Prix debut since Noboru Ueda in 1991. He also broke the record, held for ten years by previous youngest Grand Prix race winner Scott Redding, at age 15 years, 115 days at the Valencian GP, when he was entered as a wildcard rider. Öncü benefited from a 2018 change to the FIM regulations, that added the current Red Bull Rookies Cup Champion to an exemption already given to the FIM Junior World Championship winner allowing them to compete in Moto3, a series normally requiring an adult licence, at a minimum age of 15 years rather than the usual 16 years.