The original calc belong to dubledolix09. It is here.Planet = 465 px, 12742 km
Section = 64 px, 1753.7376 km
Panel Width = 217 px
Panel Height = 121 px
2*atan(tan(70/2)*(217/121) = 102.93653365627 degrees
2*atan(64/(217/tan(102.93653365627/2))) = 40.644997498202 degrees
http://www.1728.org/angsize.htm
Distance = 2367.6 km
Fourze started flying from 8:41 till 8:49, therefore 8 seconds is our timeframe.
2367600/8 = 295950 m/s, mach 869.7
I found no official weight for Fourze's bike, but from what I gathered from the internet, the average weight for a bicycle is apparently 500 lbs, or 226.796 kg.
Layer that along with Fourze's own weight of 95 kg and you get 321.796 kg.
0.5*m*v^2
0.5*321.796*295950^2 = 14092476989445 joules, or 3.3714059783361244019 kilotons
Orion Zodiarts got hit with that without sustaining so much as a scratch.
So there you go, even fodder Zodiarts in Kamen Rider Fourze have at least small town level durability. Not sure you can powerscale this towards Yummies or Dopants from OOO and W. Kamen Rider OOO and Double probably should have this level of durability at the very least since they appear to be equal to Fourze.