Honda’s GB400 Tourist Trophy was introduced in 1985 as part of the GB series of traditional-styled road sports bikes, positioned as a more classic-looking alternative to the era’s fairing-heavy machines. Honda launched it alongside the larger GB500 Tourist Trophy, and the 400 cc version became the better-known of the two in Japan’s domestic lineup. The model used a single-cylinder layout and emphasized simple, old-school roadster character rather than outright modern styling, which gave it a distinct identity in Honda’s mid-1980s range.
Within the same nameplate family, Honda also offered a special edition in 1987 and then a model change in 1988, when the product archive shows the GB400TT continuing under an updated specification. That history indicates a single continuous production run rather than a discontinued-and-revived nameplate. The GB400 Tourist Trophy is remembered as one of Honda’s more characterful Japanese-market singles, appealing to riders who wanted a conventional, lightly sporting motorcycle with a heritage-inspired look.