Spark Plugs

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NGK LMAR9E-J is a high-quality OEM-style multi-ground spark plug designed to meet manufacturer ignition requirements. Featuring a dual ground electrode design, this plug maintains consistent spark performance over time by reducing wear and sensitivity to gap growth.
Ideal for modern high-performance engines, the LMAR9E-J delivers reliable ignition, improved durability, and stable operation under demanding conditions.
Key Features
Dual ground electrode design for extended service life
Maintains consistent spark as electrodes wear
Less sensitive to gap growth vs single electrode plugs
Trivalent metal plating for corrosion resistance
Corrugated ribs prevent flashover
Copper core improves heat dissipation
Triple seals help prevent leakage
Specifications
Thread Diameter: 10mm
Thread Pitch: 1.0mm
Seat Type: Gasket
Reach: 26.5mm (1.04")
Hex Size: 14mm (9/16")
Terminal Type: Threaded Stud
Overall Height: ISO
Spark Gap: 0.028" (0.7mm)
Electrode
Center Electrode Material: Nickel
Center Electrode Type: Standard
Center Electrode Size: 2.5mm
Projection: Projected
Ground Electrode Material: Nickel
Ground Electrode Type: Multi-Ground
Ground Electrode Quantity: 2
Electrical
Resistor: Yes
Resistance: 5k Ohm
Heat Range: 9
Additional
Brand: NGK / NTK
Longevity: ~50,000 miles (application dependent)
Fitment
Yamaha,MT-10,2018,2020 
Yamaha,YZF-R1M,2015,2015 
Yamaha,YZF-R1,2009,2013 
Yamaha,YZF-R7,1993,2000"
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NGK LMAR9E-J Spark Plug

Spark Plugs / NGK

$23.95

Availability: In Stock

Quantity:

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Brand:

NGK

SKU:

2103-0091

Description:

NGK LMAR9E-J (6884) Multi-Ground Spark Plug

NGK LMAR9E-J is a high-quality OEM-style multi-ground spark plug designed to meet manufacturer ignition requirements. Featuring a dual ground electrode design, this plug maintains consistent spark performance over time by reducing wear and sensitivity to gap growth.

Ideal for modern high-performance engines, the LMAR9E-J delivers reliable ignition, improved durability, and stable operation under demanding conditions.

Key Features

Dual ground electrode design for extended service life
Maintains consistent spark as electrodes wear
Less sensitive to gap growth vs single electrode plugs
Trivalent metal plating for corrosion resistance
Corrugated ribs prevent flashover
Copper core improves heat dissipation
Triple seals help prevent leakage

Specifications

Thread Diameter: 10mm
Thread Pitch: 1.0mm
Seat Type: Gasket
Reach: 26.5mm (1.04″)
Hex Size: 14mm (9/16″)
Terminal Type: Threaded Stud
Overall Height: ISO
Spark Gap: 0.028″ (0.7mm)

Electrode

Center Electrode Material: Nickel
Center Electrode Type: Standard
Center Electrode Size: 2.5mm
Projection: Projected
Ground Electrode Material: Nickel
Ground Electrode Type: Multi-Ground
Ground Electrode Quantity: 2

Electrical

Resistor: Yes
Resistance: 5k Ohm
Heat Range: 9

Additional

Brand: NGK / NTK
Longevity: ~50,000 miles (application dependent)

Fitment

Yamaha,MT-10,2018,2020

Yamaha,YZF-R1M,2015,2015

Yamaha,YZF-R1,2009,2013

Yamaha,YZF-R7,1993,2000

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