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  • NGK Terminal Nuts NT4245-B

    NGK Terminal Nuts NT4245-B

    $0.50

    NGK Terminal Nuts NT4245-B

    $0.50
  • NGK Motorcycle Spark Plugs

    NGK Motorcycle Spark Plugs

    $7.99

    NGK Motorcycle Spark Plugs

    $7.99
  • NGK Spark Plug with Multiple Variant Options

    NGK Spark Plug with Multiple Variant Options

    $42.49

    NGK Spark Plug with Multiple Variant Options

    $42.49
  • NGK Spark Plug

    NGK Spark Plug

    $10.49

    NGK Spark Plug

    $10.49
  • NGK RESISTOR COVER - JOINT EACH

    NGK RESISTOR COVER - JOINT EACH

    $14.50

    NGK RESISTOR COVER - JOINT EACH

    $14.50
  • NGK SPARK PLUG - V-GROOVED CTN10

    NGK SPARK PLUG - V-GROOVED CTN10

    $7.21

    NGK SPARK PLUG - V-GROOVED CTN10

    $7.21
  • NGK SPARK PLUG - RESISTOR STANDARD CTN10 (p/n 5422)

    NGK SPARK PLUG - RESISTOR STANDARD CTN10 (p/n 5422)

    $7.15

    NGK SPARK PLUG - RESISTOR STANDARD CTN10 (p/n 5422)

    $7.15
  • NGK SPARK PLUG - RESISTOR STANDARD CTN10 *SOLID POST* (p/n 3961)

    NGK SPARK PLUG - RESISTOR STANDARD CTN10 *SOLID POST* (p/n 3961)

    $7.60

    NGK SPARK PLUG - RESISTOR STANDARD CTN10 *SOLID POST* (p/n 3961)

    $7.60
  • NGK SPARK PLUG - RACING CTN4 (WAS R5184105)

    NGK SPARK PLUG - RACING CTN4 (WAS R5184105)

    $93.10

    NGK SPARK PLUG - RACING CTN4 (WAS R5184105)

    $93.10
  • NGK SPARK PLUG - IRIDIUM IX - (T/NUT) CTN4

    NGK SPARK PLUG - IRIDIUM IX - (T/NUT) CTN4

    $29.45

    NGK SPARK PLUG - IRIDIUM IX - (T/NUT) CTN4

    $29.45
  • NGK SPARK PLUG TERMINAL NUT

    NGK SPARK PLUG TERMINAL NUT

    $0.50

    NGK SPARK PLUG TERMINAL NUT

    $0.50
  • NGK SPARK PLUG - RACING CTN10

    NGK SPARK PLUG - RACING CTN10

    $13.20

    NGK SPARK PLUG - RACING CTN10

    $13.20
  • NGK SPARK PLUG - IRIDIUM CTN4 (WAS IFR6B11)

    NGK SPARK PLUG - IRIDIUM CTN4 (WAS IFR6B11)

    $28.15

    NGK SPARK PLUG - IRIDIUM CTN4 (WAS IFR6B11)

    $28.15
  • NGK SPARK PLUG - COMPACT TYPE CTN10

    NGK SPARK PLUG - COMPACT TYPE CTN10

    $5.50

    NGK SPARK PLUG - COMPACT TYPE CTN10

    $5.50
  • ##NGK SPARK PLUG - RESISTOR VG CTN10

    ##NGK SPARK PLUG - RESISTOR VG CTN10

    $11.40

    ##NGK SPARK PLUG - RESISTOR VG CTN10

    $11.40
  • NGK SPARK PLUG - RACING CTN4

    NGK SPARK PLUG - RACING CTN4

    $13.55

    NGK SPARK PLUG - RACING CTN4

    $13.55
  • NGK SPARK PLUG - STANDARD CTN10

    NGK SPARK PLUG - STANDARD CTN10

    $13.55

    NGK SPARK PLUG - STANDARD CTN10

    $13.55
  • NGK SPARK PLUG - PLATINUM CTN4

    NGK SPARK PLUG - PLATINUM CTN4

    $40.45

    NGK SPARK PLUG - PLATINUM CTN4

    $40.45
  • NGK SPARK PLUG - MULTIGROUND CTN10

    NGK SPARK PLUG - MULTIGROUND CTN10

    $21.85

    NGK SPARK PLUG - MULTIGROUND CTN10

    $21.85
  • NGK Spark Plugs – Single Type, Group 5 & 8 with Iridium Options

    NGK Spark Plugs – Single Type, Group 5 & 8 with Iridium Options

    $35.95

    NGK Spark Plugs – Single Type, Group 5 & 8 with Iridium Options

    $35.95
  • NGK Spark Plugs – Single Type, Group 8 & 13 Options

    NGK Spark Plugs – Single Type, Group 8 & 13 Options

    $35.95

    NGK Spark Plugs – Single Type, Group 8 & 13 Options

    $35.95
  • NGK Spark Plug - Single - CR7EH-9 - Group 2

    NGK Spark Plug - Single - CR7EH-9 - Group 2

    $9.25

    NGK Spark Plug - Single - CR7EH-9 - Group 2

    $9.25
  • NGK Spark Plugs – Single Type, Multiple Groups & Iridium Options

    NGK Spark Plugs – Single Type, Multiple Groups & Iridium Options

    $16.50

    NGK Spark Plugs – Single Type, Multiple Groups & Iridium Options

    $16.50
  • NGK Spark Plugs – Single Type, Multiple Groups & Specifications

    NGK Spark Plugs – Single Type, Multiple Groups & Specifications

    Regular price  $9.25 Sale price  $5.90

    NGK Spark Plugs – Single Type, Multiple Groups & Specifications

    Sale price  $5.90 Regular price  $9.25

NGK Spark Plugs for Harley Motorcycles

NGK spark plugs are reference-led parts, and “close enough” has no place at a Victorian Harley parts counter. Joe Rascal’s NGK page includes individual plug listings, pages with multiple plug variants, NT4245-B terminal nuts and resistor covers. Those are different part types under one brand, so begin with the exact item required rather than the collection name alone. The wider spark plugs and leads section keeps the related categories in view.

Match the Listed Reference to the Motorcycle

A product headed NGK Motorcycle Spark Plugs may offer more than one selectable reference. Read the full listing, note the selected variant and confirm that reference against current approved application information for the motorcycle. Model family, engine and year details are more useful at the counter than a shortened product name.

This is also where a quick search can go wrong: a page carrying the NGK name may be a plug listing with variants, or it may be a separate piece of terminal hardware. Keep the reference and part type together while comparing options.

Separate Plugs from the Connection Parts

NGK Terminal Nuts NT4245-B are listed as terminal hardware, while resistor covers appear as their own products. Neither should be treated as a spark plug. Shoppers looking for a lead can move to Taylor spark plug leads; those comparing another plug brand can check Autolite spark plugs. Keeping plugs, terminal nuts, covers and leads in their named categories makes the final reference check much clearer.