Honda Motorcycle CB900F 919 front turn signal bulbs measure 1034 in size, while rear turn signal bulbs measure P21W and 1073 in size. The replacement chart covers 2002 through 2007 vehicle 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 CB900F 919 uses two distinct bulb standards across its turn signal positions: the ANSI standard, common in the US and Canada, and the ECE standard, used in Europe and worldwide markets.
The 1034 bulb is the sole front turn signal bulb across all model years of the CB900F 919, covering 2002-2007 without variation.
The 1034 is a dual-filament bulb operating at 12V with a 21/5W output, fitted with a BAY15d bayonet base. It is classified as a variant of the 1157 under the ANSI standard.
The BAY15d base on the 1034 is an offset dual-contact bayonet fitting, which physically prevents substitution with single-filament bulbs that share a visually similar base style.
The rear turn signal position of the CB900F 919 does not use a single bulb type across all years. The 2004 and 2002 model years use the 1073, while 2003 and 2005-2007 use the P21W.
The P21W is a single-filament ECE-standard bulb rated at 12V and 21W, fitted with a BA15s bayonet base.
The 1073 is also a single-filament bulb with a BA15s bayonet base, but it operates at a lower 13W output and follows the ANSI standard. It is classified as a lower wattage variant of the 1156.
Although the 1073 and P21W share the same BA15s base type, their wattage ratings differ at 13W and 21W respectively, making them non-equivalent substitutes despite physical fitment compatibility.
The dual-filament 1034 used at the front draws on both a 21W and a 5W filament, a configuration typically associated with combined turn and running light functions in a single housing.
The rear turn signal of the Honda Motorcycle CB900F 919 uses only single-filament bulbs across all listed years, regardless of whether the 1073 or P21W variant is fitted.