Aprilia Pegaso 650 Headlight Bulb Size

The Aprilia Pegaso 650 headlight bulb sizes include H11 and H1 for high beam applications, along with H11 and 9003 options for low beam configurations. The replacement chart covers vehicle production years spanning 1996 to 2007 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.

High Beam Headlight

Years	Bulb Type	Shop
2006-2007	H11	Check Price
1996-2002	H1	Check Price

Low Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
2006-2007	H11	H11	Check Price
1996-2002	9003	H4	Check Price

Bulb Specifications

Description	Type	Shop
ECE standard (Europe & worldwide). Single-filament halogen bulb with PGJ19-2 base. Also approved in the US. 12V, 55W.	H11	Check Price
ECE standard (Europe & worldwide). Single-filament halogen bulb with P14.5s base. Also approved in the US and Japan. 12V, 55W.	H1	Check Price
ANSI standard (US & Canada). Dual-filament halogen bulb with P43t base. 12V, 60W/55W.	9003	Check Price

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Additional Notes

The H11 bulb is a single-filament halogen type operating at 12V and 55W, built to the ECE standard with a PGJ19-2 base. It holds approval for use in the US as well as Europe and worldwide markets.
The H1 bulb is also a single-filament halogen type at 12V and 55W, conforming to the ECE standard with a P14.5s base. Its approval extends to the US and Japan in addition to Europe and worldwide markets.
The 9003 bulb differs from both H-series types in that it carries dual filaments, operating at 12V with a 60W/55W rating. It follows the ANSI standard applicable to the US and Canada, and uses a P43t base.
On the Aprilia Pegaso 650, the high beam headlight used the H1 bulb from 1996-2002, then shifted to the H11 for the 2006-2007 model years.
The low beam headlight followed a parallel pattern, using the 9003 bulb from 1996-2002 and transitioning to the H11 for 2006-2007.
The 2006-2007 model years are notable in that both the high beam and low beam positions share the same H11 bulb type, whereas earlier years used two distinct bulb types across those two positions.
The H1 and 9003 bulbs are not interchangeable despite both operating at 12V and sharing a 55W rating in at least one filament. The H1 uses a P14.5s single-pin base, while the 9003 uses a P43t bayonet-style base, making the two physically incompatible.
The H11 and H1 bulbs also share a 12V/55W rating but use different bases, PGJ19-2 and P14.5s respectively, which prevents cross-fitment between the pre-2006 and post-2005 high beam positions.