They're a copy of the round light 12v Cub (Enclosed fuel tank) , so 1982 onwards. (Like our C50/70/90'C' which was only used here for a year or two but it's the normal shape '80s / '90s Cub for Japanese market)Cerberus73 wrote: SYM Symba, basically looks like a mid 70s round light model cub
UK 6 volters always had the external-tank frame.