NGK BR9EIX Iridium IX Spark Plug for Royal Enfield Bullet LB 500 Machismo

The NGK BR9EIX Iridium IX spark plug is the iridium fitment for the Royal Enfield Bullet LB 500 Machismo — the big-bore lean-burn 500. It's the NGK-recommended iridium plug for this engine, a direct OEM-spec replacement.

The 0.6mm fine-wire iridium centre electrode fires a tighter, more focused spark than copper. On the larger 500 motor that means easier starts, a steadier thump at idle, and cleaner combustion — and iridium holds its gap far longer, so you ride more miles between changes.

Direct-fit, OEM-spec replacement. No tuning changes — just a sharper, longer-lasting spark.

Fitment (NGK-confirmed)

Royal Enfield: Bullet LB 500 Machismo

Riding a different Royal Enfield? The 350 STD, UCE and BS6 J-series take different plugs — message us on WhatsApp with your model and year and we'll point you to the right one.

Specifications

• Brand: NGK
• Part Number: BR9EIX
• Type: Iridium IX Spark Plug
• Centre Electrode: Iridium, 0.6mm fine-wire
• Sold as: Single plug

Key Features

• NGK-recommended iridium fitment for the Bullet LB 500 Machismo
• Easier starts and steadier idle versus a standard plug
• Long service life — iridium holds its gap
• Direct-fit OEM-spec replacement