Honda CBR 125R Radiator Reserve Fluid Tank 19110-KPP-900

Honda CBR 125R Radiator Reserve Fluid Tank is an original coolant reserve tank designed for the Honda CBR 125R motorcycle, belonging to the Radiators category. This component is responsible for the safe drainage and storage of excess fluid from the radiator, stabilizing the operation of the entire cooling system. It is a practical solution for users looking for a proven, used part with factory geometry and fitment.

Specifications and technical data

• SKU: 19110-KPP-900
• Condition: Used
• OEM Part Number: 19110-KPP-900
• Substitutable numbers: Honda, CBR 125R, 19110-KPP-900, BG
• Location on the vehicle: Rear
• Category: Radiators

Purpose and function in the cooling system

The coolant reserve tank in the Honda CBR 125R model works directly with the radiator, compensating for changes in fluid volume during engine heating and cooling. As a result, the system maintains stable operating pressure, and fluid is not uncontrollably expelled. A properly selected tank helps reduce the risk of engine overheating and makes it easier to check the coolant level.

Construction and placement on the motorcycle

The presented tank is factory-designed for installation in the rear part of the motorcycle, in accordance with the original frame construction and cooling system hose routing. Such dedicated placement ensures proper fluid circulation between the radiator and the tank, and protects the component from mechanical damage during riding.

The original geometry of the connectors and mounts facilitates installation in existing frame points, without the need for modifications or the use of additional adapters. This is particularly important in motorcycles with limited installation space, where every component must be precisely fitted.

Benefits of using an original tank

Using an original coolant reserve tank in the Honda CBR 125R provides a number of practical benefits:

• Factory fitment – compatibility with the cooling system and motorcycle frame, with no installation issues.
• Stable cooling system operation – proper compensation of fluid volume at varying temperatures.
• Easier diagnostics – clear division of functions between the radiator and the tank makes it easier to check the fluid level.
• Safe operation – reduced risk of leaks and engine overheating with a properly maintained system.

Condition, service application, and part selection

The offered item is a used part, which is a sensible choice for maintenance repairs, cooling system upgrades, or restoring a motorcycle to full efficiency after a collision. It will work well both in workshops specializing in Honda motorcycles and for private users servicing their own vehicles.

When selecting a tank, it is worth paying attention to compatibility with the specific version of the CBR 125R model and the manufacturer's markings. Both the OEM part number and interchangeable numbers can be helpful – all this information can be found in the product technical specifications section. This minimizes the risk of purchasing an incompatible part and shortens repair time.

Technical support and additional information

If you are planning comprehensive maintenance of the cooling system in your motorcycle and want to better understand how high temperatures affect the operation of the radiator and associated components, check out our guide: how summer heat affects the cooling system and when it is worth reaching for used parts. This is a practical addition to your knowledge when planning the replacement of the reserve tank.

For those who want to consciously purchase used components online, we also recommend the following material: safe purchase of used motorcycle parts step by step. You will find tips there regarding part verification by numbers, condition assessment, and optimal selection for a specific vehicle.