It appears Rossi's sprocket was the cause of his issues in FP1

https://imgur.com/a/HR2RM1h
Submitted August 10, 2018 at 03:32PM by JaySpillz https://www.reddit.com/r/motogp/comments/967fgr/it_appears_rossis_sprocket_was_the_cause_of_his/?utm_source=ifttt