99% OF JAPANEESE BIKE AND TRIKES HAVE 7/8" BARS.. I THINK THE ONLY HONDAS THESE WON'T WORK ON IS THE MR50'S AND C70'S/PASSPORTS 310D @ BLACK MIRROR_HOLDER BRACKET/CLAMP 7/8" BARS FOR 10MM_RH_THREAD (SOLD_EACH) 1/19W (310C) 99% OF JAPANEESE BIKE AND TRIKES HAVE 7/8" BARS.. I THINK THE ONLY HONDAS THESE WON'T WORK ON IS THE MR50'S AND C70'S/PASSPORTS 310C