The Champion N3C Spark Plug is a relatively cool spark plug with a heat range comparable to the NGK B8ES. This spark plug is appropriate for 1962-1972 BSA 650 and 750 twins and 1969-1972 triples, as well as 1963-1979 Triumph 650 and 750 twins and triples. May be suitable for other applications. Spark plugs must be fitted with the correct heat range to optimize efficient combustion and protect the engine from overheating. This product is sold individually and multiple quantities to save money.
The Champion N3C has 14mm threads, thread reach of 19mm, a non-projected tip configuration, and a removable terminal for fitment with various spark plug cap types. The Champion N3C spark plug standard has a copper core for improved conduction. The cool heat range may result in carbon fouling in some machines and may not be suitable for all vintage British motorcycles.
The spark plug fires the fuel mixture charge as it enters the combustion chamber, resulting in combustion and power. Spark plugs must be gapped correctly and free of heavy carbon and oil deposits to provide a strong spark.
The Champion N3C spark plug is threaded into the cylinder head and sealed with a special integrated crush washer. Refer to your workshop manual for the correct gap setting.
Please note: Due the nature of the product, we unfortunately do not accept returns on bearings, service tools or electrical components. Please be confident about your purchase before ordering. If you have questions, please contact us.
The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.
Champion N3C Spark Plug FAQs
What is the Champion N3C spark plug used for?
The Champion N3C is a copper-core spark plug used in selected classic Triumph and BSA motorcycles. It has a relatively cool heat range, 14 mm threads, a 19 mm thread reach, and a non-projected firing tip. The Bonneville Shop offers the Champion N3C spark plug, PN TBS-N3C individually and in multiple-quantity packs.
Will the Champion N3C fit my Triumph T120 or T140 Bonneville?
The Bonneville Shop lists the Champion N3C for selected 1963–1979 Triumph 650 cc and 750 cc twins and triples, a range that includes T120 and T140 Bonneville applications. However, model name and engine size alone do not confirm the correct heat range for every motorcycle. Check your exact model-year workshop manual and ignition requirements before ordering the TBS-N3C spark plug.
Which classic BSA motorcycles can use Champion N3C spark plugs?
The product description lists the Champion N3C for 1962–1972 BSA 650 cc and 750 cc twins, plus 1969–1972 BSA triples. Compatibility still depends on the engine’s specified plug dimensions and heat range. Browse our classic motorcycle spark plugs and leads to compare available options and confirm your motorcycle’s specification before purchasing.
What NGK spark plug has a comparable heat range to the Champion N3C?
The Champion N3C has a heat range comparable to the NGK B8ES, according to The Bonneville Shop’s product description. This is a heat-range comparison—not a guarantee of interchangeability in every engine. Confirm the complete plug specification and your motorcycle’s requirements before changing brands or plug types. The Champion N3C product page provides its dimensions and application guidance.
What is the difference between Champion N3C and N4C spark plugs?
The Champion N3C runs cooler than the Champion N4C. The Bonneville Shop compares the N3C’s heat range with NGK B8ES and the N4C’s with NGK B7ES. Both Champion plugs have 14 mm threads, 19 mm reach, and non-projected tips, but their different heat ranges mean they are not automatically interchangeable. Compare the Champion N4C spark plug with your motorcycle’s specified plug before choosing.
What does the “3” in Champion N3C mean?
The “3” identifies the spark plug’s heat range. Within a given Champion plug family, higher numbers indicate hotter-running plugs, so an N3C is cooler than an N4C. Heat range describes how a spark plug transfers heat away from its firing end, rather than how powerful its spark is. See Champion’s spark plug identification guide for its numbering conventions.
What is the Champion N3C thread size, reach, and terminal type?
The Champion N3C has a 14 mm thread diameter, 19 mm thread reach, a non-projected firing tip, and a removable terminal. It seals against the cylinder head using an integrated crush washer. These details are listed on the Champion N3C specifications and ordering page and should be checked against your engine’s requirements.
What spark plug gap should I use with a Champion N3C?
Set the Champion N3C electrode gap to the specification in your motorcycle’s workshop manual. The Bonneville Shop does not prescribe one universal gap for every Triumph or BSA application; its installation guidance specifically directs owners to the appropriate workshop manual. Check the gap before fitting rather than assuming the supplied setting matches your motorcycle.
Can a Champion N3C spark plug become carbon-fouled?
Yes. The Bonneville Shop notes that the N3C’s relatively cool heat range can lead to carbon fouling in some motorcycles and may not suit every vintage British engine. Champion explains that a spark plug must run hot enough to burn off conductive deposits, which can otherwise cause misfires. Confirm the specified heat range before switching to another plug; Champion’s heat-range technical guide explains this balance.
Will the Champion N3C work with my existing spark plug caps and leads?
The Champion N3C has a removable terminal to accommodate different spark plug cap types. Check that your existing caps match the terminal configuration before installation; a removable terminal does not establish compatibility with every cap or ignition setup. Replacement components are available in our spark plugs and leads range.
Is the Champion N3C sold individually or as a pair?
The Bonneville Shop offers the Champion N3C in single-plug, two-plug, and four-plug quantities. Select the required quantity on the Champion N3C product page before adding it to your cart. Check the selected pack size carefully so you receive the number of plugs you need.
Can I return a Champion N3C spark plug if I order the wrong one?
The product page states that The Bonneville Shop does not accept returns on electrical components, so confirm fitment before ordering. If you need help, call 720-570-7884 or email orders@thebonnevilleshop.com with your motorcycle’s details. The Champion N3C listing includes the product-specific returns notice and contact information.
Reviews
There are no reviews yet.