H2O Performance Water & Oil Cooler Kit EVO – Yamaha R1/R1M RN49/RN65 (2017–2026)

The Yamaha R1 and R1M (RN49/RN65) represent the pinnacle of supersport engineering — and their thermal demands are equally uncompromising. H2O Performance's Water and Oil Cooler Kit for the 2017–2026 generation is built to match that ambition: a precision-engineered EVO Series cooling system constructed from robust, lightweight aluminium that eliminates the thermal ceiling of the OEM setup and keeps your engine performing at full capacity, lap after lap.

Key Features

• Significantly enlarged water cooler surface area with optimised fin geometry for dramatically improved heat dissipation at full throttle, during track sessions and in high ambient temperatures
• Integrated high-performance oil cooler reduces oil temperatures, maintains a stable oil film at high revs and reduces engine wear for extended service life
• EVO-optimised internal channels deliver faster heat extraction and improved coolant flow under extreme thermal load
• Robust, lightweight aluminium construction engineered for racing environments — durable without adding unnecessary mass
• Direct plug-and-play fitment for all Yamaha R1 and R1M RN49/RN65 models from 2017 to 2026, no modifications required
• Suitable for road, track day and professional racing applications, including heavily tuned and power-upgraded builds

Engineering & Build Quality

Where the H2O Performance EVO kit distinguishes itself is in the quality of its construction. The aluminium core is precision-formed to exact tolerances, with racing-grade fins that maximise the surface-area-to-volume ratio. The finer internal channel architecture of the EVO series accelerates coolant throughput, meaning heat is carried away from the engine faster than the standard radiator can achieve. The integrated oil cooler works in concert with the water cooler to address both primary heat sources simultaneously — an approach that pays dividends on track, where sustained high-rpm running pushes both water and oil temperatures into critical territory.

Performance on Road & Track

Riders who push their R1 or R1M hard — whether on a spirited back-road run, a track day, or in a race series — will notice the difference almost immediately after installation. Water and oil temperatures drop and stabilise at a lower equilibrium, removing the temperature-induced power drop that the OEM cooler allows during sustained hard riding. Throttle response feels cleaner, engine output remains consistent through entire sessions, and the drivetrain and seals benefit from the reduced thermal stress. For owners of tuned or modified R1s, where engine output and heat generation are already beyond factory specification, this kit is a genuine necessity rather than a luxury upgrade.

Fitment & Compatibility

This kit is designed exclusively for the following models:

• Yamaha R1 RN49 — model years 2017 to 2026
• Yamaha R1M RN65 — model years 2017 to 2026

Direct plug-and-play installation with no permanent modification to the chassis or existing cooling circuit. Suitable for road-registered machines and closed-circuit racing builds alike.

Specifications

• Brand: H2O Performance
• Series: EVO
• Kit contents: high-performance water cooler and oil cooler
• Construction: aluminium
• Fitment: Yamaha R1/R1M RN49/RN65, 2017–2026
• Installation: plug-and-play, no modification required
• Intended use: road, track day, racing