A braking misjudgment meant Hiroshi Aoyama lost touch with the riders ahead of him early in Sunday's Spanish Grand prix at Jerez.
The MotoGP rookie, who had qualified in twelfth, was already 17th and last at the end of the first lap – then ran wide to avoid colliding with another rider at turn eight.
From then on it was a lonely ride to 14th place for the Interwetten Honda rider.
“I didn't have a good start and I made a mistake,” said the Japanese, who was tenth at round one in Qatar. “After breaking too hard I had to avoid crashing into another rider and had to go wide. After that I lost the connection.
“This was not an easy race for me. I am so sorry for my team to have destroyed all their work of the weekend with this mistake. I really hope the next race will be better again.”
“It cannot always be sunshine,” shrugged team manager Daniel Epp. “Hiro made a mistake, but these things happen.”