The facts.
DescriptionThe whole story▼
Buy a filter for a ten-year-old sports bike and half the decision has been made for you already: forums, club threads and a decade of accumulated experience have settled what people fit. The SRK 800 RR arrived for 2025 and has none of that behind it. There is no consensus to copy, which leaves the published specification as the only honest source — and for this airbox that specification is unusually complete. Three media are catalogued for one shape, each with its own pair of numbers, and reading them in the right order settles the question without waiting for somebody else to go first.
Key Features
- Woven polyester in a single dry layer, 80 microns of filtration
- Rated at 5,050 l/m²/sec, the medium designated for road and track use
- 93.13 % retention on 100-micron test particles, against 76.42 % for four-layer oiled cotton
- Direct replacement in the series airbox of the SRK 800 RR, with no remap
- About twice the filtering surface of a conventional performance element
- Washable and reusable; two-year warranty from the date of purchase
How to read three media without a forum
Aperture first, flow second, and always as a pair. The catalogue offers 14 microns at 1,800 l/m²/sec for dusty use and this panel at 80 and 5,050, and between those two the pattern is a trade: whatever is gained on one figure is paid for on the other. The racing F1-85 at 15,000 sits outside that line altogether, since its name is not a pore size and it is a different weave rather than a looser one. From there the question is not which medium is best but which air the bike breathes, and the one the manufacturer designates for road and track was drawn for the conditions most of these machines will actually see.
What the first owners are deciding
Less than the aftermarket usually implies. A slot-in panel does not make a standard SRK 800 RR noticeably stronger; intake duct, airbox volume, throttle bodies and calibration were approved together, and a change of cloth does not revise them. What is being decided is whether the intake restriction stays a consumable that creeps upward between purchases, or becomes a serviceable item that returns to its starting point whenever you choose. On a machine bought new, that is being decided for the first time, with nothing yet to undo.
Care and cleaning
Compressed air, applied to the clean face and worked outward, handles routine servicing: the load leaves the weave along the path by which it arrived. Where air alone leaves a haze, lukewarm water and a trace of mild detergent will remove it, followed by rinsing until the water runs clean. The panel then dries in ambient air, never with heat — no gun, no radiator, no flame — and the SM266S goes back in dry and untreated. Its maintenance sheet is available from the Downloads tab on this page.
Fitment & Compatibility
Cut for the airbox of the QJ Motor SRK 800 RR, model years 2025 and 2026, one element per machine. This code covers that model alone; check your year against the fitment list before ordering.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- QJ Motor SRK 800 RR (2025–2026)
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.