Re complaints about the lack of ventilation since fixing the visor I have found that if you run with the main visor approx 1/3 to 1/2 open and the top vent open the visor actually forces the air flow into the top vent and keeps your head cool.
Wonder if that was part of the original design but let down by the poor visor pivot arrangement or just lucky coincidence.
Wonder if that was part of the original design but let down by the poor visor pivot arrangement or just lucky coincidence.