BMC Air Filter FM782/08 for Royal Enfield Classic 500 EFI (2009–2021) / Bullet EFI 500 (2011–2021) / Electra EFI 500 (2008–2012) / Trials 500 (2019–2020) – Washable High-Flow Replacement Air Filter (OEM Ref 581007/581007A)

The BMC FM782/08 is a premium washable, reusable, high-flow replacement air filter designed to fit inside your bike’s stock airbox and replace the OEM paper element—without modification. BMC specifies oiled cotton gauze as the filter media, supplies it pre-oiled, and supports it with a 2-year limited warranty. 

This is the right upgrade for riders who want better airflow with strong filtration: BMC states these filters are engineered to increase airflow while filtering impurities down to very fine levels (BMC cites 7 microns vs typical OEM paper around 10 microns), and the “Full Moulding” construction helps improve sealing and durability. 

Confirmed official fitment (BMC catalog):

• Classic EFI 500 (2009–2021)

• Bullet EFI 500 (2011–2021)

• Electra EFI 500 (2008–2012)

• Trials 500 (2019–2020) 

What this is: Genuine BMC aftermarket performance air filter (not Royal Enfield-branded “OEM”).
What this is not: Not for carb/older Bullet 500s, not for 350s, and not for 650 Twins/Himalayan/etc. (see exclusions below).

Fitment check available on WhatsApp—share your model + year before ordering if you are unsure.

Key Features

• Exact part number: FM782/08 (cylindrical replacement air filter) 

• Filter media: Oiled Cotton Gauze (high-flow performance filtration) 

• Washable & reusable: Yes (clean + re-oil as per service conditions)

• Factory pre-oiled: ready to install out of the box 

• OEM cross reference: Royal Enfield 581007 / 581007A (helps validate correct application) 

• EAN/Barcode: 8055732591755 (authenticity check) 

• Warranty: 2 Years Limited (as per BMC) 

• Box content: 1 Air Filter (single unit) 

• Key dimensions (BMC): base OD 76 mm, base ID 114 mm, height H77 mm 

Best for:

• Daily riding where you want longer service life than paper filters

• Touring (consistent airflow + serviceable filter)

• Riders maintaining Classic/Bullet EFI 500 platform

Compatibility Table (Model | Fitment | Notes)

Explicit exclusions (to reduce returns):

• Not for Royal Enfield 350 UCE / Classic 350 / Bullet 350 / Thunderbird 350 (different filters).

• Not for Royal Enfield 650 Twins (Interceptor/GT 650), not for Himalayan/Scram, not for J-Series 350 (Classic Reborn/Meteor/Hunter/Bullet 350 J).

• Not for older carburetor Bullet/Standard 500 unless your bike exactly matches the BMC-listed EFI models/years. 

CHECK PART NUMBER BEFORE PURCHASE 

Variants 

• No variants for this listing: This page is strictly for BMC FM782/08. 
  Note: BMC mentions it offers “Standard” and “Race” versions for some bike applications generally; if you specifically want a Race-spec option for your model, message us and we’ll confirm availability before you order. 

What’s in the Box

• 1 × BMC Air Filter FM782/08 (single unit) 

Installation Notes 

Tools typically needed: basic screwdriver set + sockets/Allen keys to open the airbox (varies by model).
Install checklist (recommended):

1. Open airbox carefully and wipe the sealing surface clean (no dust/grit).

2. Seat the filter evenly—ensure full contact all around the sealing edge.

3. Close airbox and tighten evenly to avoid air leaks.

Maintenance notes (important):

• FM782/08 is washable and can be regenerated using the appropriate BMC regeneration kit. 

• Avoid over-oiling after cleaning (can restrict airflow).

FAQs

Q1. Which bikes does BMC FM782/08 fit officially?
It is officially listed by BMC for Classic EFI 500 (2009–2021), Bullet EFI 500 (2011–2021), Electra EFI 500 (2008–2012), and Trials 500 (2019–2020). 

Q2. Does it fit Royal Enfield Classic 500 UCE (EFI)?
If your bike is Classic EFI 500 within 2009–2021, yes—this is the official BMC match. 

Q3. Is this an OEM / Genuine Royal Enfield part?
It is a genuine BMC aftermarket performance air filter. BMC provides OEM cross references 581007 / 581007A for the matching Royal Enfield application, but it is not RE-branded OEM packaging. 

Q4. Is FM782/08 washable and reusable?
Yes—BMC specifies Lavabile (Washable): Yes and the filter is designed to be washed and regenerated. 

Q5. Is it pre-oiled or do I need to oil it before use?
BMC states all its air filters are pre-oiled.

Q6. What is included in the box?
BMC lists “1 Air Filter” as the box content for FM782/08. 

Q7. How do I confirm authenticity?
Match the part number FM782/08 and check the EAN 8055732591755 on the packaging where applicable. 

Q8. Does it fit Thunderbird 500?
Some sellers list Thunderbird 500 fitment, but BMC’s official FM782/08 page does not list Thunderbird 500. Please ❓Verify fitment before ordering (WhatsApp fitment check available). 

Q9. Will I need remapping after installing this filter?
On a stock EFI 500, usually no. If your bike has intake/exhaust modifications, fueling behavior can change—monitor rideability and consult a tuner if needed.

Q10. Can I return it if I ordered the wrong one?
Air filters are fitment-sensitive. Please use our WhatsApp fitment check before ordering to avoid mismatch. Return eligibility follows Under The Hood store policy.