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ProX 52.61018 replacement air filter for the KTM 85 SX and Husqvarna TC 85 from 2018 and the GasGas MC 85 from 2021, small wheel 17/14 and big wheel 19/16. The ProX catalogue 2026 lists it up to the 2026 models.
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The ProX 52.61018 is the ProX OEM replacement air filter for the 85 cc two-stroke engine that KTM, Husqvarna and GasGas share. ProX makes it from dual stage bonded foam, with a thick, flat foam sealing ring that seats against the air box.
Fits (ProX catalogue 2026): KTM 85 SX 2018 to 2026, Husqvarna TC 85 2018 to 2026 and GasGas MC 85 2021 to 2026, small wheel 17/14 and big wheel 19/16. It does not fit the KTM 85 SX before 2018, the Husqvarna TC 85 2014 to 2017 or the KTM 105 SX; ProX lists other filters for those, 52.62011 for the 85 SX 2013 to 2017 and the TC 85 2014 to 2017.
Care (KTM owner's manual, 85 SX): wash the foam in filter cleaning liquid, never in fuel, which attacks the foam. Squeeze it dry, never wring it out, and oil the dry filter with a foam filter oil such as VP Powersports Foam Filter Oil. In sand, mud or wet conditions, check the filter about every 30 minutes.
Also in stock for this engine: ProX and Wiseco gasket sets and the Wiseco 47.00 mm piston kits, Pro-Lite and Racer Elite.
Part number: ProX 52.61018, GTIN 00193564346681.
Orders placed by 10:00 CET on a working day ship the same day, others usually the next working day. Delivery within the EU takes 2-4 working days after dispatch. Outside the EU, checkout shows the delivery time of each DHL service.
Orders shipped to EU destinations qualify for free shipping once the cart subtotal reaches €150. Orders shipped elsewhere are charged carrier rates, calculated automatically at checkout.
You have 30 days from delivery to return any item in original condition. Full policy →
Pro-X Racing Parts makes engine and carburettor parts for motocross. Art of Racing stocks the ProX gasket sets for the KTM 85 SX, Husqvarna TC 85 and GasGas MC 85 (complete set 34.6118, top end set 35.6118, head and base set 36.6118), the 52.61018 air filter for the same bikes, and Mikuni VM main and pilot jets in single sizes.
| Make | Model | Years | Notes |
|---|---|---|---|
| GASGAS | MC 85 | 2021–2024 | |
| Husqvarna | TC85 | 2018–2024 | |
| KTM | 85 SX | 2018–2024 |
