I hope this somewhat answers your question.
Most, if not all Japanese motorcycle have a symetrical headlight pattern where the high and low beam are projected evenly in front of vehicle. On older bikes the manufacturers also had 'motorcycle' imprinted into the glass or plastic lens to confirm it was a dedicated unit with symetrical pattern for motorcycles. You will need to look at the lens to confirm this fact or in a simple test check the shine pattern between Hi and Lo beams with the vehicle facing a wall in a darkened area to confirm the whether its a symetrical or asymetrical beam pattern unit.
Some manufacturers have been known to fit dedicated "handed" HL units to bikes going to specific markets.
The term "handed" means that on cars for example that are RH drive, the units shine directly ahead for High beam and down and to the left for low beam. The same applies for LH drive vehicles except the low beam pattern shines down and to the right.
If you know what you are looking for, you can easily identfy if the "flutes" in the lens or reflector are "handed" or not.
