The new rules also brought more power by allowing the fitting of a larger diameter restrictor ( 33 mm to 36mm ) .
Honda R&D also took the opportunity to bring several evolutions for the 2014 version of the HR412 - E .
The new rules also brought more power by allowing the fitting of a larger diameter restrictor ( 33 mm to 36mm ) , and Honda R&D also took the opportunity to bring several evolutions for the 2014 version of the HR412 - E .