The facts.
| Brand | H2O Performance |
|---|---|
| Product type | Supplementary water radiator kit |
| Fitment | Yamaha YZF-R3 (2015-2026) |
| Function | Expands the stock cooling circuit with additional radiator surface area |
| Core design | Optimised fin structure for maximum heat dissipation |
| Installation | Integrates alongside OEM radiator, no major modification required |
| Intended use | Road, sport, track day and racing |
DescriptionThe whole story▼
The stock cooling system on the Yamaha R3 is competent for everyday riding, but push the engine hard on a track day, ride through a summer heatwave, or run a tuned setup and thermal headroom disappears fast. The H2O Performance additional water radiator kit is engineered specifically to eliminate that weakness — expanding the cooling circuit with a precision-built supplementary radiator that keeps coolant temperatures stable wherever the road or circuit takes you.
Key Features
- Significantly increased cooling capacity through additional radiator surface area, reducing peak coolant temperatures under sustained hard use
- Optimised fin structure maximises heat dissipation, maintaining the engine in its ideal thermal operating range
- Robust, durable construction built to withstand the vibration and stress of both road and racing environments
- Straightforward integration alongside the stock radiator — no major modification required
- Reduces thermal wear on seals, gaskets and engine internals, improving long-term reliability
- Ideal for tuned or power-upgraded R3 builds where the factory cooling system is already at its limit
Build Quality and Materials
H2O Performance has built its reputation supplying cooling upgrades to club racers and track day enthusiasts who cannot afford overheating-induced engine damage. This supplementary radiator kit reflects that heritage: the core is constructed for durability under repeated thermal cycling, the fin geometry is engineered rather than generic, and every component is selected to cope with the demands of sustained high-rpm operation. The result is a unit that feels purposeful and substantial — not an aftermarket add-on, but a genuine engineering solution.
Performance on Road and Track
Once installed, the difference is tangible. Coolant temperature spikes that previously appeared during track sessions or slow-moving summer traffic flatten out. The engine runs more consistently across the entire rev range, power delivery feels cleaner, and the nagging anxiety about climbing temperature gauges disappears. For riders already running an aftermarket exhaust, a power commander, or other performance upgrades, this kit addresses the thermal gap those modifications can open up. For standard road riders in hot climates, it provides a reassuring buffer that the factory setup simply cannot match.
Who This Kit Is For
- Yamaha R3 riders who use their bike hard on road or track and want to eliminate thermal stress
- Track day riders and those entering club-level racing on the R3 platform
- Commuters and touring riders operating in high ambient temperatures
- Owners of modified or performance-upgraded R3 machines where heat management is critical
- Anyone who prioritises engine longevity and wants maximum reliability from their R3
Fitment & Compatibility
This kit fits the Yamaha YZF-R3 across the full production run from 2015 through to 2026. It is designed to integrate with the existing cooling circuit without significant disassembly or fabrication work.
Specifications
- Brand: H2O Performance
- Type: Supplementary water radiator kit
- Fitment: Yamaha YZF-R3 (2015-2026)
- Function: Expands stock cooling circuit for increased thermal capacity
- Core design: Optimised fin structure for maximum heat dissipation
- Installation: Integrates alongside OEM radiator, no major modification required
- Intended use: Road, sport, track day and racing
FitmentWhich bikes this fits▼
- Yamaha R3 (2015–2026)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
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.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.