H2O Performance Water Radiator Kit for Yamaha R1 RN22 (2009–2014)

When a crossplane R1 is pushing hard through a trackday session or a long summer ride, the stock radiator is often the weakest link in the thermal chain. The H2O Performance water radiator kit replaces the OEM cooler entirely, bringing a significantly enlarged core surface and race-optimised fin geometry to the Yamaha R1 RN22 (2009–2014) — delivering the cooling headroom that this engine genuinely demands.

Key Features

• Substantially increased cooling capacity thanks to an enlarged radiator core surface area
• Race-spec fin geometry engineered to shed heat faster under full-throttle and stop-and-go conditions
• Robust aluminium construction — lightweight, rigid and proven on both road and circuit
• Precise OEM-replacement fit for Yamaha R1 RN22 models (2009–2014); no modifications required
• Reduces thermal stress on seals, oil and internal engine components, extending long-term durability
• Supports consistent torque delivery by keeping the engine closer to its optimal operating temperature
• Equally at home on standard, sport-tuned and race-prepared RN22 builds

Engineered for the Crossplane R1

The Yamaha R1 RN22's crossplane-crank inline-four is celebrated for its raw, linear power delivery — but that character comes with a thermally demanding engine that generates significant heat at high rpm. In warm ambient conditions or during sustained track use, the standard radiator routinely reaches its limits, producing climbing coolant temperatures, fluctuating power output and accelerated component wear.

H2O Performance addressed this by designing a direct-replacement radiator that slots straight into the RN22's original mounting points while offering a meaningfully larger heat-exchange surface. The optimised aluminium core dissipates heat more efficiently at every speed, keeping coolant temperatures lower and more stable whether you are filtering through city traffic or pinning the throttle on circuit.

On-Road and Track Performance

The practical effect of the upgrade is felt immediately. Coolant temperatures stabilise at a lower set point, the engine's torque curve feels cleaner and more consistent, and the RN22 no longer suffers the subtle power cuts that a heat-saturated OEM cooler can induce. For trackday regulars and racers, the added thermal reserve is a genuine safety margin — reduced heat soak means the engine is less likely to reach a condition where the ECU intervenes to protect it. On longer road rides in hot climates, the same logic applies: the motor simply runs in a calmer, more reliable state across the entire journey.

Fitment & Compatibility

This H2O Performance water radiator kit is a direct OEM replacement designed exclusively for the following model:

• Yamaha R1 RN22 — model years 2009, 2010, 2011, 2012, 2013, 2014

It is suitable for standard road-registered machines, sport and touring setups, and race-prepared or tuned RN22 builds.

Specifications