NGK - 90398 - LMAR8E-J Nickel Spark Plug

NGK Standard spark plugs (in the iconic NGK 'yellow box' packaging) are a proven OE cornerstone and technology customers have relied on for decades. Engineered specifically for OE applications, NGK Standard spark plugs provide OE quality nickel alloy reliable performance and design. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance, while triple gasket sealing prevents combustion gas leakage. Solid 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties. M/C - 2021-2020 YAMAHA

• TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
• Pure alumina silicate ceramic insulator provides superior strength and better heat transfer
• Trivalent metal plating for superior anti-corrosion and anti-seizing properties
• Corrugated ribs prevent flashover
• Copper core aids in heat removal
• Triple seals prevent leakage

NGK Standard Spark Plug 90398 is an OE-focused nickel spark plug engineered for reliable performance in specified Yamaha motorcycle applications from model years 2020–2021. Its nickel alloy construction and proven design support dependable ignition performance for automotive and powersports applications.

The spark plug features a high-grade alumina silicate ceramic insulator for increased strength and dielectric performance. A solid 98% pure copper core supports heat dissipation and conductivity across a wide heat range, while trivalent metal plating helps resist corrosion and seizing for easier installation and removal. Corrugated ribs help prevent flashover, and triple gasket seals help prevent combustion gas leakage.

Key Features & Performance Benefits

• Nickel alloy construction: Provides OE-quality design and reliable performance.
• 98% pure copper core: Aids heat removal and supports conductivity.
• Alumina silicate ceramic insulator: Delivers high strength and supports heat transfer and dielectric performance.
• Trivalent metal plating: Helps provide anti-corrosion and anti-seizing properties.

Key Product Specifications & Technical Data

• Brand: NGK
• Part number: 90398
• Model: LMAR8E-J
• Product type: Standard spark plug
• Electrode material: Nickel alloy
• Core material: 98% pure copper
• Insulator material: Alumina silicate ceramic
• Sealing design: Triple gasket seals

What's Included in the Box

NGK 90398 LMAR8E-J Nickel Spark Plug. Fitment data available: Yamaha motorcycles, model years 2020–2021.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 10