H2O Performance Water + Oil Radiator Kit – Yamaha R1 RN32/RN49 (2015–2019)

Running a Yamaha R1 RN32/RN49 hard — whether that means back-to-back track sessions, spirited A-road riding in summer heat, or a tuned engine pushing beyond stock output — places demands on the OEM cooling system that it simply was not designed to sustain. The H2O Performance Water + Oil Radiator Kit replaces both standard coolers with an enlarged, race-optimised aluminium combination that keeps temperatures genuinely in check under every load condition, protecting your engine and preserving full power delivery from the first lap to the last.

Key Features

• Complete drop-in kit replacing both the OEM water radiator and oil cooler in a single upgrade
• Enlarged cooling surface area with racing-optimised fin geometry for maximum heat dissipation
• Lower coolant and oil temperatures maintained consistently across all throttle positions and load ranges
• Reduced thermal stress on bearings, pistons and seals, extending engine service life
• Lightweight aluminium construction — robust enough for track use, refined enough for everyday roads
• Plug-and-play fitment as a direct OEM replacement — no fabrication or custom brackets required

Why the Stock Cooling System Falls Short

The Yamaha R1 RN32/RN49 is a genuinely sophisticated superbike: a crossplane inline-four with ride-by-wire, sophisticated traction management and a power output that generates serious heat. The factory radiator and oil cooler are sized for typical road use within controlled ambient temperatures. Push the R1 into track days, sustained high-speed runs, or aggressive sport riding on a warm day and coolant temperatures climb, oil viscosity suffers, and the ECU may begin pulling power to protect the engine. That is the problem the H2O Performance kit is built to solve.

Water Radiator — Increased Thermal Capacity

The upgraded water radiator offers a substantially larger frontal core area and refined fin pitch compared to the OEM unit. More surface area means more heat is transferred to passing air at any given road speed, keeping coolant temperature stable even when the R1 is held at high revs through long, fast corners or during stop-start paddock situations. The result is a steadier operating temperature, more consistent ignition and fuelling maps, and a motor that feels cleaner and more responsive throughout the rev range.

Oil Cooler — Consistent Lubrication Under Pressure

Oil temperature directly governs lubricant film strength. When oil overheats its viscosity drops, metal surfaces move closer together and wear accelerates. The H2O Performance oil cooler maintains a lower, more stable oil temperature so the lubricant film remains intact through hard acceleration, sustained high revs and repeated braking events. Bearings, cam followers, con-rod journals and piston crowns all benefit — translating into lower long-term maintenance costs and a longer engine life for a machine that is expensive to rebuild.

Everyday and Track Usability

This kit earns its place on road-registered R1s just as much as on dedicated track bikes. On a hot summer commute or a long continental tour, the enlarged cooling capacity means the fan cycles less frequently and temperatures stay well within the safe band without any rider intervention. On track days the benefit is immediate and measurable: lap after lap, the R1 pulls the same peak power figures rather than softening progressively as heat builds. For owners of modified or power-upgraded R1s where heat output exceeds the OEM cooling margin, this kit is a straightforward and cost-effective solution before considering more invasive engine work.

Fitment & Compatibility

This H2O Performance kit is designed as a precise, direct replacement for the following models:

• Yamaha R1 RN32 — 2015, 2016, 2017, 2018, 2019
• Yamaha R1M RN49 — 2015, 2016, 2017, 2018, 2019

Installation follows OEM mounting points and hose connections. No modifications to the airframe or fairing are required.

Specifications

• Brand: H2O Performance
• Kit contents: high-performance water radiator + oil cooler
• Material: aluminium
• Fitment: Yamaha R1 RN32 / R1M RN49, 2015–2019
• Installation type: direct OEM replacement (plug-and-play)
• Intended use: road, sport riding, track days, circuit racing