Casey Stoner believes that his post-retirement involvement with Honda did not reach its potential due to the fact that Marc Marquez felt threatened by his presence at the team.
Marquez replaced Stoner at Honda when the two-time World Champion called time on his career after the 2012 season, although the Australian retained close ties with the team that he had enjoyed so much success with.
Stoner rejoined Honda in mid-2013 as a test rider, a role he continued to perform until February 2015. When Marquez's Repsol Honda team-mate Dani Pedrosa was forced to miss last season's races in Austin and Argentina due to an arm pump issue, Stoner was considered a possible replacement, but Honda instead turned to Hiroshi Aoyama, a decision that Stoner believes was made because of Marquez.
"At Honda I was just an occasional tester and wasn't being used to my potential," Stoner told Motosprint. "I loved working with the HRC guys but I think Marc and his crew felt in some way threatened by me and I don't know why. I was just there to test and help.
"I have absolutely no hard feelings towards Honda and I have great respect for Shuhei Nakamoto [HRC vice president], so our relationship will be fine in the future.
"I felt ready [to replace Pedrosa] for Austin. Nakamoto told me he was sorry and that it had been him who made the decision. But I think other people must have put pressure on him for me not to race."
Stoner has since joined Ducati as a brand ambassador and test rider.