Radiator Assembly Component
The bypass hose appears as an individual component in the radiator assembly, separate from the main water hoses and hose clamps.
Honda · Genuine OEM Part
Honda 19504-KZR-600 is the HOSE, BYPASS listed in Honda’s radiator assembly catalog. It is a coolant hose within the radiator system, where bypass hose routing helps connect the cooling-system passages around the radiator assembly. Honda’s parts illustration identifies it as a separate service part alongside the water hoses, radiator, cooling fan, clamps, and related fittings.
The exact Honda catalog name and part number identify this component as a bypass hose rather than a general-purpose tube or an adjacent water hose. Ordering by 19504-KZR-600 helps distinguish it from the separately listed HOSE A, WATER and HOSE B, WATER.
The bypass hose appears as an individual component in the radiator assembly, separate from the main water hoses and hose clamps.
The official Honda description is HOSE, BYPASS, and the published part number is 19504-KZR-600. Using both identifiers helps separate this hose from nearby cooling-system components with similar names.
Honda’s exploded radiator diagram places 19504-KZR-600 among the cooling-system hoses and related hardware. Its catalog placement supports identifying the part as a dedicated bypass hose serving the radiator assembly.
| Honda Part Number | 19504-KZR-600 |
|---|---|
| Honda Catalog Description | HOSE, BYPASS |
| Part Type | Hose |
| Assembly | Radiator |
| Model | Type | Model Years |
|---|---|---|
| ADV150A | Motorcycle | 2021–2023 |
| PCX150 | Motorcycle | 2013, 2015–2020 |
| PCX150A ABS | Motorcycle | 2019–2020 |
Model applications as listed in Honda's dealer parts catalog for part number 19504-KZR-600.
Verify the Honda OEM part number for your specific model before ordering.

Compatible motorcycles, ATVs & side-by-sides
Verify your vehicle's model, year and specific configuration before ordering.