• Royal Enfield 572328/B spark plug UR6DC OEM for Classic 350 UCE
  • Genuine RE UR6DC M10 spark plug 572328B for Bullet 350/500 UCE
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UNDER THE HOOD

Genuine Royal Enfield Spark Plug UR6DC (M10) – Bullet 350/500 UCE, Classic 350, Classic 500 EFI, Electra 350 UCE, Thunderbird 500 | OEM 572328/B

Genuine Royal Enfield Spark Plug UR6DC (M10) – Bullet 350/500 UCE, Classic 350, Classic 500 EFI, Electra 350 UCE, Thunderbird 500 | OEM 572328/B

Rs. 150.00
Rs. 155.00 Rs. 150.00
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Important Order Policy
Please order only after confirming the part number, model, variant, year, side, connector type and compatibility. All orders are non-cancellable once placed. Correctly shipped spare parts are not eligible for return, exchange or refund due to wrong selection, wrong diagnosis, fitment mismatch, mechanic recommendation or change of mind. Electrical/electronic items are additionally non-returnable once opened, installed, plugged in, tested or used. Wrong item, damaged item or missing item claims require a complete unboxing video within 24 hours. Read full Return & Warranty Policy

If your Royal Enfield is showing hard starts, misfires, rough idle, or reduced pickup, the first component to bring back to OEM spec is the spark plug. Royal Enfield 572328/B is the genuine factory-spec Spark Plug UR6DC (M10) used across multiple UCE-era 350cc and 500cc models. 

Unlike generic “compatible” plugs that often vary in heat range or electrode quality, the OEM UR6DC is designed to maintain consistent ignition under real Indian riding conditions—stop-go traffic, heat, dusty commutes, and long touring days. This directly supports smoother throttle response, easier cold starts, and more stable combustion over the service interval.

This listing is ideal for riders doing a scheduled service, troubleshooting misfire/jerks, or restoring performance after a long storage period. Supersedes older part number 572328/A as referenced in dealer microfiche pricing listings.

Key Features 

  • Genuine Royal Enfield OEM spark plug (not aftermarket copy) 

  • Plug type/spec: UR6DC (M10 spark plug format referenced by sellers) 

  • Helps address common symptoms: hard starting, misfire, poor idle, weak pickup

  • Recommended for routine service replacement to reduce ignition-related breakdowns

  • Correct OEM spec improves combustion stability vs. random “universal” plugs

  • Sold as 1 unit (single spark plug) 

  • Direct replacement for bikes listed in compatibility (no modification) 

Compatibility Table

Fitment below is included only where model applicability is explicitly listed by multiple sellers for this part number. 

Model Engine Type BS Stage Year Range
Bullet 350 UCE (KS) UCE 350 ❓ Verify by plug code UR6DC
Bullet 350 UCE (ES) UCE 350 ❓ Verify by plug code UR6DC
Bullet 500 UCE UCE 500 ❓ Verify by plug code UR6DC
Classic 350 UCE 350 ❓ Verify by plug code UR6DC
Classic 500 EFI UCE 500 (EFI) ❓ Verify by plug code UR6DC
Electra 350 UCE (ES) UCE 350 ❓ Verify by plug code UR6DC
Thunderbird 500 UCE 500 ❓ Verify by plug code UR6DC

Important verification rule (to reduce returns): If your existing plug marking is NOT UR6DC, do not order this—send your VIN or current plug photo and match via microfiche first. 

Variants

  • No variants (single part, 1 unit): Spark Plug UR6DC – 572328/B

FAQs 

  1. Is this an original Royal Enfield spark plug or “compatible”?
    This listing is for genuine Royal Enfield part number 572328/B (UR6DC).

  2. Will it fit Classic 350 Reborn / J-Series / Meteor 350 / Hunter 350?
    No for J series spark plug click here. 

  3. What is the difference between 572328/A and 572328/B?
    Microfiche price listings show 572328/A as an older reference with replacement to 572328/B. 

  4. Do I need to set spark plug gap?
    Follow your bike’s service manual specification. If you are replacing like-for-like UR6DC, keep the OEM-recommended gap—do not guess.

  5. When should I replace the spark plug?
    Replace during routine service intervals, or immediately if you have misfire, hard start, or erratic idle and the plug shows wear/fouling.

Verify Fitment on Official Brand Portals

For selected genuine spare parts, you can cross-check the part number on the official brand portals before ordering.

Royal Enfield Official Spares Portal

Hero MotoCorp Official eCatalogue

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