OS? I haven't seen any Ninja onroad versions of the OS so Ninja does not want to go onroad or OS is keeping the onroad for them selves.
The Killer offroad is Force based, I can imagine with the input of RB they are busy to devellop an onroad engine. Other options are always Picco, Sirio and the old GP (from there comming again to Tecnopower...)
Speed is only fiction but a 130+km/h MRS4 is for real.