The Aprilia RS 50 headlight bulb size specifications include H8 and 6235B bulb sizes for both high and low beam applications. A replacement chart covering 2002 through 2007 model years documents the headlight bulb specifications for this motorcycle.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Aprilia RS 50 uses two distinct bulb types across its model years: the H8 halogen and the 6235B festoon, each governed by a different regional standard.
The H8 is an ECE-standardized single-filament halogen bulb rated at 12V and 35W, fitted with a PGJ19-1 base, and carries approval for use in both European and US markets.
The 6235B is an ANSI-standardized festoon bulb with blue tinted glass, rated at 12V, and is classified as a specialty application component under US and Canadian standards.
On the Aprilia RS 50, the H8 bulb serves both the high beam and low beam headlight positions for the 2006-2007 model years, with a single bulb type fulfilling both functions simultaneously.
The 6235B bulb occupies both the high beam and low beam positions across the 2002-2005 model years, following the same dual-position fitment pattern as the H8 in later years.
Because the H8 and 6235B differ in base type, wattage rating, and construction standard, the two bulb types are not interchangeable between the earlier and later model year groups.
The PGJ19-1 base of the H8 is a keyed bayonet-style fitting specific to lower-wattage halogen applications, which physically prevents substitution with bulbs using incompatible bases.
The blue tinted glass of the 6235B alters the color temperature of the emitted light relative to clear glass festoon bulbs, a characteristic associated with specialty automotive and motorsport applications.