BULB - HEADLIGHT 12V 45/40W - BA20D

A standard replacement headlight globe for motorcycles, scooters and ATVs that run a 12V 45/40W BA20D bulb. The BA20D base is a two-pin bayonet fitting with a dual filament, so the one globe covers both high and low beam.

Suited to riders replacing a blown or dimming original bulb, or keeping a spare in the tail pack. Before ordering, check the markings on your existing bulb (voltage, wattage and base code) to confirm they match — headlight housings vary between models.

• 12V 45/40W headlight bulb (high/low beam)
• BA20D two-pin bayonet base
• Dual filament — single globe serves both beams
• Direct standard replacement for original BA20D headlight bulbs
• Suits motorcycles, scooters and ATVs fitted with a BA20D headlight

Check the voltage, wattage and base code stamped on your existing bulb (12V, 45/40W, BA20D) before fitting to confirm a match.
Switch off the ignition and let the old bulb cool completely before removing it — headlight bulbs stay hot well after shutdown.
Handle the globe by its metal base and avoid touching the glass with bare fingers; skin oils can create hot spots and shorten bulb life. Use a clean cloth or gloves.
If the glass is touched, wipe it with methylated spirits on a lint-free cloth and let it dry before switching on.
Align the two side pins with the slots in the socket, push in and twist to lock — do not force the bulb if it will not seat.
Refit the rubber boot or dust seal correctly so the headlight housing stays sealed against water and dust.
Test both high and low beam before riding, and re-check headlight aim after replacement.
Repeated early failures usually point to charging system overvoltage, a loose connector or excessive vibration rather than the bulb — have the wiring and mounting checked.
Store spare bulbs in their packaging, in a dry place, protected from knocks.