Cool vid with questions?

[ak]

https://m.youtube.com/watch?v=D1c6W8xbF_s

Ok cool video here question is are these riders hoyer,sieg and renner in the video on turbo snow bikes? If not what size are they 450 four strokes?

 

[Rush44]

450 4 strokes. I think Brock has a turbo in his fleet and Reagan was running a 520BB.

 

[funjunkie]

There are no turbo's in that video. 450's one 520 big bore.