Suzuki Motorcycle LT500R QuadRacer headlight bulbs utilize a 9003 size for both high and low beam functions. The replacement chart covers 1987 to 1990 production years 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.
The Suzuki Motorcycle LT500R QuadRacer uses the 9003 bulb across both its high beam and low beam headlight positions for the 1987-1990 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both high and low beam functions independently.
Because the same 9003 bulb type is specified for both the high beam and low beam positions, the two positions share a physically identical and interchangeable bulb.
The 9003 operates on a 12-volt electrical system and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm collar. Bulbs with differing base types are not compatible with this socket regardless of voltage or wattage similarity.
The 9003 designation follows the ANSI standard used in the United States and Canada. It is functionally equivalent to the international H4 designation, though labeling differences exist between markets.