BMC Air Filter FM01138 for Royal Enfield Meteor 350 / Classic 350 Reborn / Hunter 350 / Bullet 350 (J-Series) – Washable High-Flow Cotton Gauze Replacement (OEM Ref: 1570250)

The BMC FM01138 is a premium washable, reusable, pre-oiled cotton gauze performance air filter designed to replace the stock air filter inside the OEM airbox on Royal Enfield’s new-generation 350 platform (J-Series). It is intended as a direct replacement for the OEM filter reference Royal Enfield 1570250 (BMC OEM cross reference). 

Compared to many competitor listings that only mention 2–3 bikes and skip newer variants, the official BMC fitment list for FM01138 also covers Bullet 350 (2023>), Goan Classic 350 (2025>), and Bullet Reditch 350 (2025>)—important for buyers searching those exact keywords on Google. 

What you get: 1× BMC FM01138 filter (pre-oiled), backed by a 2-year limited warranty as per BMC. 
What you do NOT get: this is not the OEM paper element; it is a genuine BMC aftermarket performance filter.

If your bike is a special edition/registration-year mismatch, ❓Verify fitment before ordering—WhatsApp fitment check available (share model + year + airbox photo if possible).

Key Features 

• Part Number: BMC FM01138 

• Filter Media: Oiled Cotton Gauze (performance filtration) 

• Washable & Reusable: Yes (serviceable—clean and re-oil when needed) 

• Factory Pre-Oiled: ready to install out of the box 

• OEM Cross Reference: Royal Enfield 1570250 (helps verify correct application) 

• Dimensions (BMC): ID base 51 mm, OD base 90 mm, height 104 mm 

• EAN / Barcode: 8055732593223 (authenticity check) 

• Stock airbox fitment: cylindrical replacement filter—no cutting/mods required (as commonly supplied by sellers) 

Best for: daily city riding, touring, riders who want a premium reusable alternative to paper filters.

Compatibility Table (Model | Fitment | Notes)

Explicit Exclusions (reduce wrong orders/returns)

• Not for Classic 350 UCE (2009–2021) / old UCE platform filters (different airbox/filter design).

• Not for 650 Twins (Interceptor/GT 650), Himalayan/Scram, 411/450 platforms, or other engines.
  If you’re unsure: ❓Verify fitment before ordering (WhatsApp fitment check).

Variants 

• No variants: this listing is strictly for BMC FM01138 (single filter SKU). 

What’s in the Box

• 1 × BMC FM01138 Air Filter 

Installation Notes (tools/fitment notes + warnings)

Typical tools: screwdriver set + basic sockets/Allen keys (for side cover + airbox access).
Install checklist:

1. Open airbox; prevent dust from falling into the intake.

2. Wipe the sealing surface clean.

3. Seat the filter evenly—ensure an airtight seal all around.

4. Tighten airbox screws evenly.

Service / warranty hygiene:

• This filter is pre-oiled. Clean/re-oil only when required; avoid over-oiling (can restrict airflow). 

• For best results, use a proper filter cleaning/regeneration process (BMC-compatible kit recommended).

FAQs 

Q1. Which bikes does BMC FM01138 fit officially?
As per BMC’s compatibility list: Meteor 350 (2021>), Classic Reborn 350 (2022>), Hunter 350 (2022>), Bullet 350 (2023>), Goan Classic 350 (2025>), Bullet Reditch 350 (2025>). 

Q2. Does it fit my Classic 350 Reborn (J-Series)?
Yes—BMC lists Classic Reborn 350 (2022>) under FM01138. 

Q3. Does it fit Meteor 350?
Yes—BMC lists Meteor 350 (2021>) under FM01138. 

Q4. Is this an OEM Royal Enfield filter?
No. This is a genuine BMC aftermarket performance air filter. BMC provides an OEM cross reference: Royal Enfield 1570250 for application matching.

Q5. What is included in the box?
BMC states package contents: 1 air filter. 

Q6. Is FM01138 washable and reusable?
Yes—BMC lists Washable: Yes. 

Q7. Is it pre-oiled?
BMC specifies oiled cotton gauze filtration media; it is commonly supplied ready to install. 

Q8. How do I confirm authenticity?
Check the part number FM01138 and the EAN 8055732593223 on the packaging/label. 

Q9. Will it increase performance?
BMC filters are engineered for improved airflow versus typical paper filters; real-world gains depend on your bike’s condition and other mods (exhaust/ECU).

Q10. What if I’m not 100% sure about fitment?
❓Verify fitment before ordering. WhatsApp us your model + year (and airbox photo if possible) for confirmation before dispatch.