The Honda VT series comprises motorbikes with two-cylinder V engines. More sporting V engined bikes are given "VTR" model numbers. Four-cylinder V-engined Hondas are designated VF or VFRs, while Honda motorbikes with inline engines mostly belong to the CB and CBR series.
Just because an engine is listed within a series or sub-series doesn't mean it is directly related to another within the same category.