Description
The NGage B8RII-8 Double Iridium Spark Plug is a premium motorcycle spark plug developed for select Royal Enfield motorcycles, including the Himalayan and the full 650 platform range listed below. Manufactured in Japan, this spark plug is part of NGage’s iridium series designed for modern motorcycle ignition systems used in both BS4 and BS6 applications.
NGage specifies the B8RII-8 as a Double Iridium spark plug, indicating the use of iridium material on both the center electrode and the ground electrode. Iridium is chosen in spark plug manufacturing for its ability to withstand high combustion temperatures while maintaining electrode stability over time. This construction approach is commonly used in modern motorcycles that operate under tighter emission and combustion control requirements.
Application for Royal Enfield Motorcycles
The B8RII-8 spark plug is listed by NGage for use in multiple Royal Enfield motorcycles across two distinct engine platforms:
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The Royal Enfield Himalayan
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The Royal Enfield 650 series, including Interceptor 650, Continental GT 650, Bear 650, Super Meteor 650, Shotgun 650, and Classic 650
These motorcycles share ignition system requirements that align with the B8RII-8 specification as published by NGage. This spark plug is intended as a direct replacement within these applications, without modification.
The Royal Enfield 650 platform spans multiple body styles and riding formats, but ignition requirements remain consistent across these models. Listing each model explicitly ensures clarity for riders searching by motorcycle name rather than engine family or platform grouping.
Compatibility with BS4 and BS6 Vehicles
NGage specifies that the B8RII-8 spark plug is compatible with both BS4 and BS6 vehicles. This makes it suitable for Royal Enfield motorcycles produced before and after the transition to BS6 emission standards, provided the motorcycle is included in the compatibility list.
No additional emission-related claims, tuning effects, or regulatory certifications are stated by NGage for this product, and none are implied here.
Manufacturing Origin
The NGage B8RII-8 spark plug is manufactured in Japan, as stated on the product packaging. NGage does not publish further details regarding production processes, quality certifications, or testing standards for this model. The country of manufacture is provided as factual information only.
Intended Use
This spark plug is designed for routine replacement during scheduled maintenance or when replacing worn ignition components on compatible Royal Enfield motorcycles. It is suitable for standard road use within manufacturer-recommended service intervals.
NGage does not classify this spark plug as a racing-only, track-specific, or performance-tuning component. It is intended for regular motorcycle operation within the scope of the listed applications.
Fitment Accuracy
Correct spark plug selection is critical for engine operation. The B8RII-8 should be installed only on motorcycles listed in the compatibility section below. Use on non-listed models is not recommended.
Royal Enfield Himalayan 450 is not compatible with this spark plug. The Himalayan 450 uses a different engine architecture and ignition specification.
Compatibility
Royal Enfield Motorcycles
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Royal Enfield Himalayan
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Royal Enfield Interceptor 650
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Royal Enfield Continental GT 650
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Royal Enfield Bear 650
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Royal Enfield Super Meteor 650
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Royal Enfield Shotgun 650
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Royal Enfield Classic 650
Variant Explanation
This listing covers NGage B8RII-8 Double Iridium Spark Plug only.
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“Double Iridium” refers to iridium usage on both electrodes, as defined by NGage.
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No alternative heat ranges or material variants are included under this listing.
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Any comparison with other spark plug constructions is outside the scope of this product page.
Specifications
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Brand: NGage
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Part Number: B8RII-8
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Spark Plug Type: Double Iridium
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Vehicle Compatibility: BS4 & BS6
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Country of Manufacture: Japan
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Application: Motorcycle spark plug
Installation / Usage Notes
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Install on compatible motorcycles only.
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Follow Royal Enfield service manual torque specifications.
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Ensure the engine is cool before installation.
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NGage does not publish gap or torque values for this spark plug.
