Complex sentence: After training and preparing for four months took a stock H2R, only adding special-formula rubber tires developed by Pirelli to withstand such high speeds, and, wearing a special one-piece leather suit by Rev'It to enhance aerodynamics.
Split into simpler sentences: After training and preparing for four months took a stock H2R, only adding special-formula rubber tires developed by Pirelli to withstand such high speeds. Also wearing a special one-piece leather suit by Rev'It to enhance aerodynamics.