How do I race against the computer? Jovi Mirkovic November 02, 2017 18:25 The Rokai has a race mode program to allow you to race against the computer. Follow the instructions below to set up a race. Related articles How can I measure my heart rate when working out? The strokes aren't being recorded An introduction to the Rokai How do I use the console? I can hear a scraping sound when pulling on the pull cord. Comments 0 comments Article is closed for comments.