Honda Motorcycle NC700X front turn signal bulbs measure P21/5W in size while rear turn signal bulbs measure P21W, with both specifications detailed for the referenced motorcycle model. The replacement chart covers 2012 through 2017 production years and contains bulb size specifications for turn signal applications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle NC700X uses two distinct bulb types across its turn signal positions: the P21/5W at the front and the P21W at the rear, both governed by ECE standards recognized in Europe and worldwide.
The P21/5W is a dual-filament bulb rated at 12V with a 21W primary filament and a 5W secondary filament, mounted on a BAY15d bayonet base. The dual-filament design allows a single bulb to serve two separate lighting functions.
The P21W is a single-filament bulb rated at 12V and 21W, mounted on a BA15s bayonet base. Its single-filament construction means it serves one dedicated lighting function only.
The BAY15d base of the P21/5W and the BA15s base of the P21W are not interchangeable. The BAY15d base features offset pins to ensure correct polarity orientation for dual-filament operation, while the BA15s base uses a single-contact design suited to single-filament use.
The front turn signal position on the Honda Motorcycle NC700X specifies the P21/5W for the full 2012-2017 model range without variation.
The rear turn signal position on the NC700X likewise specifies the P21W consistently across the 2012-2017 model range.
Because the P21/5W and P21W share the same 21W primary wattage, their current draw on the main filament is identical, though the front bulb carries an additional 5W load from its secondary filament.
Substituting a P21W in place of a P21/5W front position would result in a base mismatch, as the BA15s single-contact base is physically incompatible with a BAY15d socket.