Not exactly sure, as I bought a spare set of very low-mileage carbs from a dealer as a take-off from a then-new bike that probably had fallen over (carbs have a smashed TPS housing). One clue is the spare carbs have D screws, so they must be one of the later 790's; I did measure the air ports (came up approx. 2.46 + mm) to verify the dimensions. FWIW the carbs had 120/42's in 'em.
