PG (aka Kiss) 54.5mm HEAD for Dio 54 or 55mm Bore kits w/lower profile. DD50 ect
SYM DD50, Arnada 50, Cha Cha 50, 2T Fiddle 50. PG (aka Kiss) Dio Stroker Head. These are 54.5mm in size. This is so you can use them on a 54mm and a 55mm size Dio bore kit. Honda Dio af18/25 (1st gen).