The facts.
| Brand | H2O Performance |
|---|---|
| Type | Additional water radiator (supplementary) |
| Material | Aluminium |
| Fitment | Honda CBR 1000 RR SC77 (2017–2019) |
| Installation | Supplements stock radiator, no complete cooling system replacement required |
| Fin structure | Optimised for rapid heat dissipation under load |
| Intended use | Road, trackday, touring |
DescriptionThe whole story▼
When you push your Honda CBR 1000 RR SC77 to its limits — through a fast mountain pass, a summer trackday, or a long spirited ride — coolant temperatures can climb faster than the stock radiator can manage. The H2O Performance additional water radiator expands your Fireblade's cooling capacity with a precision-engineered oversize unit that bolts alongside the standard radiator, delivering consistently lower and more stable coolant temperatures whenever the engine demands it most.
Key Features
- Oversize aluminium construction increases total cooling surface area for noticeably faster heat dissipation under sustained load
- Optimised fin geometry extracts heat more efficiently than the stock unit, even at low airflow speeds in slow traffic or pit-lane queues
- Supplements the standard radiator without requiring a full cooling system replacement — more cooling volume, minimal installation complexity
- Reduces the frequency of ECU protective interventions by keeping temperatures in a stable operating window throughout a full day of riding
- Precision-routed hose connections designed specifically for the CBR 1000 RR SC77 chassis ensure a clean, rattle-free fitment
- Ideal for spirited road riding, mountain passes, trackdays, and extended touring in warm conditions
Engineered for the CBR 1000 RR SC77
The Honda CBR 1000 RR in its SC77 generation (2017–2019) produces serious power, and serious power means serious heat. H2O Performance developed this supplementary radiator specifically for that platform, studying the stock cooling layout to identify where capacity is lost at high rpm and sustained full throttle. The result is a unit that integrates seamlessly into the existing coolant circuit, adding thermal reserve rather than replacing infrastructure. Whether you are running consecutive track sessions or touring through the Alps on a hot day, the engine runs quieter, the ECU stays out of its protection maps, and output remains consistent from morning to evening.
Build Quality and Materials
The core is constructed from high-grade aluminium, chosen for its superior thermal conductivity and low weight. The optimised fin structure maximises the ratio of surface area to airflow resistance, so the additional radiator works efficiently even without a dedicated fan. Every component is designed for the demands of performance riding — resistant to the vibration, temperature cycling, and occasional stone strikes that come with serious road or track use. This is not a universal accessory adapted to fit; it is a purpose-built part engineered for the SC77 chassis from the outset.
Who This Radiator Is For
- Honda CBR 1000 RR SC77 (2017–2019) owners who experience high coolant temperatures under load
- Trackday riders who run multiple sessions back-to-back and need sustained thermal stability
- Sport road riders who push hard on mountain roads and in warm summer conditions
- Touring riders who want consistent engine temperatures over long days in the heat
- Owners focused on protecting the engine long-term by reducing thermal stress on gaskets, seals, and internals
Fitment and Compatibility
This H2O Performance additional water radiator is developed exclusively for the Honda CBR 1000 RR SC77 model years 2017, 2018, and 2019. It is not compatible with earlier SC59 or SC57 generations. Always confirm your model year and chassis code before ordering.
Specifications
- Brand: H2O Performance
- Type: Additional water radiator (supplementary)
- Material: Aluminium
- Fitment: Honda CBR 1000 RR SC77 (2017–2019)
- Installation: Supplements the stock radiator, no full system replacement required
- Intended use: Road, trackday, touring
FitmentWhich bikes this fits▼
- Honda CBR 1000 RR SC77 (2017–2019)
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Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
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