Honda Motorcycle CBR300R uses H7 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2015 to 2020 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle CBR300R uses the H7 bulb for both the high beam and low beam headlight positions across the 2015-2020 model years.
The H7 is a single-filament halogen bulb, meaning each housing position requires its own dedicated bulb rather than sharing a dual-filament unit between high and low beam functions.
H7 bulbs operate on a 12V, 55W electrical specification, which reflects standard halogen output levels for motorcycle headlight applications.
The H7 bulb uses a PX26d base, a two-pin connector type that is not interchangeable with other common bases such as the P43t used by H4 bulbs or the P14.5s used by H1 bulbs.
The H7 is an ECE-standard bulb, meaning it was developed under European regulations and carries approval for use across worldwide markets, including the United States and Japan.
Because both the high beam and low beam positions on the CBR300R share the same H7 specification, a single bulb type serves both functions, though each position remains a physically separate installation.