The Aprilia RS 125 headlight bulb specifications include H11 and H3 sizes for high beam operation, along with H11 and H1 sizes for low beam operation. The replacement chart covers 1997 through 2010 production years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Aprilia RS 125 uses three halogen bulb types across its headlight specifications: H11, H3, and H1. All three operate at 12V and 55W, and all three carry ECE approval for use in Europe and worldwide markets.
The H11 bulb uses a PGJ19-2 base and holds ECE approval as well as US approval. It serves as both the high beam and low beam bulb for the RS 125 across the 2006-2010 model years.
The H3 bulb uses a PK22s base and carries ECE, US, and Japanese approval. On the RS 125, it fills the high beam position for the 1997-2005 model years.
The H1 bulb uses a P14.5s base and also holds ECE, US, and Japanese approval. It occupies the low beam position for the 1997-2005 model years on the RS 125.
All three bulb types are single-filament designs, meaning each bulb produces one light function only. Separate bulbs are therefore required for high and low beam positions in configurations that use different types for each function.
The base types across these three bulbs are not interchangeable. The PGJ19-2 base of the H11, the PK22s base of the H3, and the P14.5s base of the H1 are physically distinct, and substituting one type for another is not possible without a housing modification.
For the 2006-2010 RS 125, the same H11 bulb type is specified for both the high beam and low beam positions, indicating that both housings share a common socket format during that period.
For the 1997-2005 RS 125, the high beam and low beam positions use different bulb types, H3 and H1 respectively, which means the two housings have different socket formats and the bulbs for each position are not interchangeable with one another.