hello from France,
in europe, we drive the E-spec version ( efra legal ) .
We have new lightenend piston with new sleeve ( agressive diagrams ) , new cranck shaft ( same design but higher diagrams ).
I use it during the french championship ( moded version by me ) on very big tracks (often 70m straight), and I have noo problems to compeet JP's or Rody's...
My TR have no problems when it's very hot ( Nova bases have....), and I ran out of fuel 1mn after the others....
Is the piston of R-spec lightened??
some pics of my OS
bye.