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BMC Drop-In Air Filter Yamaha YZF-R1/M RN32, RN49 & RN65 (2015-2026) FM856/04

CHF 74.19

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Born from circuit engineering and refined for the relentless demands of the Yamaha YZF-R1 and R1M, the BMC FM856/04 replacement air filter delivers measurable gains in airflow and filtration efficiency without a single compromise on engine protection. Designed to slot directly into RN32, RN49 and RN65 chassis from 2015 through 2026, this is the upgrade that separates a race-focused build from a standard service replacement.

Key Features

  • Four-layer cotton gauze construction draws on BMC's motorsport heritage to maximise airflow while maintaining exceptional filtration across the full rev range.
  • Low-tack specialist oil treatment allows high air permeability and superior particle absorption simultaneously — no trade-off between performance and engine protection.
  • Epoxy-treated aluminium mesh surround resists petrol vapour and oxidation, preserving filter integrity through hard track sessions and extended road use alike.
  • Rubber frame eliminates the risk of cracking and ensures a consistent, rattle-free seal in the airbox every time.
  • Washable and reusable design cuts long-term running costs and reduces waste — simply clean, re-oil and refit.
  • Tested to international standards for quality and performance, giving confidence for both road homologation and track-day use.

Track-Developed Airflow Technology

BMC's four-layer cotton gauze is engineered to minimise pressure drop across the filter medium. On a high-revving inline-four like the YZF-R1's crossplane-crank engine, reduced intake restriction translates directly into sharper throttle response and a more linear power delivery — qualities that matter whether you are chasing lap times at a circuit or threading through fast road bends. The optimised airflow path keeps pressure loss to a minimum without allowing harmful contaminants to reach the engine internals.

Built to Last, Not to Replace

Where a standard paper element is discarded after a single service interval, the FM856/04 is engineered for repeated use. The epoxy-finished aluminium mesh holds its shape and its resistance to petrol vapour season after season. The rubber frame prevents the micro-fractures that can develop in paper or foam elements under vibration, ensuring the seal against the airbox housing remains perfect. Cleaning and re-oiling the filter restores full performance, making this a long-term investment that pays for itself over consecutive service intervals.

Fitment & Compatibility

The BMC FM856/04 is a direct drop-in replacement air filter for the following Yamaha models:

  • Yamaha YZF-R1 RN32 (2015-2016)
  • Yamaha YZF-R1M RN32 (2015-2016)
  • Yamaha YZF-R1 RN49 (2017-2019)
  • Yamaha YZF-R1M RN49 (2017-2019)
  • Yamaha YZF-R1 RN65 (2020-2026)
  • Yamaha YZF-R1M RN65 (2020-2026)

No modifications to the airbox or intake system are required. The filter installs using the original fixings and housing.

Specifications

  • Brand: BMC
  • Part Number: FM856/04
  • Type: Drop-in replacement air filter
  • Filter Medium: Four-layer oiled cotton gauze
  • Frame Material: Rubber
  • Mesh Material: Epoxy-treated aluminium
  • Fitment: Yamaha YZF-R1 / YZF-R1M, chassis codes RN32, RN49, RN65 (2015-2026)
  • Maintenance: Washable and reusable
More guides on Filters & Maintenance →