
The facts.
| Chain pitch | 525 |
|---|---|
| Number of links | 110 - 120 (selectable) |
| Weight (kg/100 links) | 1.9 kg |
| Relative service life (per 100 links) | 3600 |
| Seal type | QX2-Ring |
| Application | Road |
| Colour | Gold/Gold |
| Master link | Rivet link |
| Chain type (EK) | Z/3D |
| Manufacturer | EK Chain |
DescriptionThe whole story▼
Built from the ground up for high-performance road motorcycles, the EK 525 Z/3D QX2-Ring chain in Gold/Gold combines a precision three-dimensional Z-series construction with advanced QX2-Ring sealing technology to deliver a tensile strength of 44.5 kN (10,003 lbs) — placing it firmly among the strongest 525-pitch chains available for supersport and naked bikes.
Key Features
- QX2-Ring seal technology drastically reduces internal friction, retains lubrication longer and achieves a relative service life rating of 3600 per 100 links
- 44.5 kN / 10,003 lbs tensile strength handles the sustained torque and acceleration demands of the most powerful production road bikes
- ThreeD Z-series (Z/3D) construction distributes load evenly across every link, maintaining dimensional stability under repeated high-stress cycles
- Gold/Gold finish provides a corrosion-resistant outer coating alongside a premium aesthetic that complements performance machinery
- Supplied open with a rivet link for the most secure, permanent connection — the preferred choice for high-output engines
- Available in 110 or 120 links to suit a range of swingarm lengths and sprocket combinations
Construction and Material Quality
The Z/3D designation reflects EK Chain's proprietary ThreeD manufacturing process, in which side plates are precision-formed to create a three-dimensional profile that spreads tensile and lateral loads far more effectively than conventional flat-plate chains. The result is a chain that maintains its geometry mile after mile, reducing both elongation and the wear rate on sprocket teeth.
At the heart of each link, the QX2-Ring seal keeps factory-applied grease locked inside the pin-and-bushing interface while blocking road contaminants from entering. Compared with a standard O-ring chain, the QX2 profile achieves a lower contact area and therefore less drag — a meaningful advantage on a bike where drivetrain efficiency directly influences throttle response.
The Gold/Gold Finish
The full Gold/Gold treatment is not purely cosmetic. The outer coating adds a layer of corrosion resistance that is particularly valuable on a chain exposed to road salt, rain and the heat cycles generated by a high-performance drivetrain. On a premium build — matching gold sprockets or a complementary wheel finish — the result is cohesive and purposeful rather than showy.
Rivet Link Connection
This chain is supplied open, ready to be cut to the precise link count you select (110 or 120 links), and closed with the included rivet link. A riveted connection is mechanically superior to a clip-type master link at elevated power levels: once peened, it cannot be displaced by vibration or lateral flex, making it the correct choice for any motorcycle producing serious torque.
Fitment and Compatibility
The 525 pitch and 110–120 link count covers an exceptionally broad range of performance road motorcycles. Confirmed compatible applications include, among others:
- Aprilia RSV4, RSV4 R, RSV4 RR, RSV4 RF, RSV4 1100, RSV4 1100 Factory, RS 660, RS 457, Tuono V4, V4 R, V4 S
- BMW S1000RR, M1000RR, HP4, HP4R
- Ducati 848, 899, 959, 1199, 1199 S, 1199 R, 1299, 1299 S
- Honda CBR 600 RR, CBR 1000 RR, CBR 1000 RR-R
- Kawasaki ZX-6R, ZX-10 R, ZX-10 RR, ZX-4 RR, Ninja 400
- KTM RC 390, RC8 1190, 990 RC R
- MV Agusta F3, F4, 675 SR-R, 990 RC R
- Suzuki GSX-R 600, GSX-R 750, GSX-R 1000
- Triumph Daytona 675, Daytona 675 R, Daytona 765, Daytona 765 Moto 2, Street Triple 765 R, Street Triple 765 RS
- Yamaha R3, R6, R7, R9, R1, R1M
- Bimota KB998 Rimini; CFMOTO, QJMotor, and other 525-pitch applications
Always verify the correct link count and sprocket pairing for your specific model year before ordering.
Specifications
| Specification | Detail |
|---|---|
| Chain pitch | 525 |
| Number of links | 110 – 120 (selectable) |
| Weight | 1.9 kg / 100 links |
| Relative service life (per 100 links) | 3600 |
| Seal type | QX2-Ring |
| Application | Road |
| Colour | Gold/Gold |
| Master link | Rivet link |
| Chain type | Z/3D |
| Manufacturer | EK Chain |
What's includedEverything in the box▼
- 1x Chain
FitmentWhich bikes this fits▼
Universal product — Please check whether it fits your bike.
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.