Correct sprockets! 5th 200 kph @ 14k = approx 16k 142 mph indicated. I was told about 139 real @ 16k 5th.
There is something shifty going on in the video at 0:29. You see 207 kph at 14.5 krpms ... then the zoom freeze shot, which has the exact same track background, shows 207 @ 15.1 krpms. You can use comma (,) and period (.) when paused to go back and forth and look at the two frames. Weird. Ah, he's actually slightly further down the track looking at the right side of frame, must have clutched. An unfortunate frame grab with clutch.