Off Topic , But very interesting ,The Highest Revving Bikes Ever !

[Silverrider]

9 Of The Highest Revving Four-Stroke Bikes In The World


https://www.youtube.com/watch?v=Xqh747uTe8o

The Highest Revving Two Stroke Bikes Ever

https://www.youtube.com/watch?v=4fr4R2bFuoA