What happens if you are stalled and you fail at rolling 4-6 result? Do you try again or is there any consequences happens before that?
Edit: nevermind, the line "for each successive roll add +1 time" doesn't mean successful, basically however long you failed to restart the bike til you succeed is how many +1 time to you add (so if you fail two times but succeed on 4, you add +2 on your time). I would suggest to bold the word successive in my opinion