NGK SPARK PLUG D8HA 7112

NGK Spark Plug – D8HA

Part No.: 37-D8HA
Key Features:

• Copper Core: The D8HA spark plug features a copper core, which efficiently dissipates heat from the electrode and insulator tip, preventing overheating and improving the plug’s lifespan.
• Raised Pre-Ignition Rating: The spark plug’s high-conduction copper and long nose insulator ensure better heat distribution, reducing the chances of pre-ignition in high-performance engines.
• Non-Resistor: This spark plug does not contain a resistor, making it ideal for engines that don’t require electrical interference protection.

Specifications:

• Heat Range: 8 (ideal for engines operating at slightly higher temperatures).
• Thread Size: 12mm (fits engines with 12mm thread plugs).
• Gap: 0.028″ (0.7mm), ensuring optimal spark for ignition.
• Hex Size: 11/16″ (18mm), a standard size for easy installation and removal.
• Reach: 12.7mm (1/2″), ensuring proper installation depth in the engine.
• Terminal Type: Stud Terminal Threads, designed for threaded stud connections.
• Seal Type: Gasket Seat, providing a secure seal during installation.
• Resistor: No, it does not contain a resistor.

Applications: This spark plug is compatible with a wide range of vintage motorcycles and small engines, including:

Honda:

• 1981-1970 Honda ATC series (ATC110, ATC90, etc.)
• 1969-1961 Honda CA160, CA175, CA200, CA95 Benly Touring series
• 1961-1965 Honda CB160, CB175K, CB550F Super Sport, CB750 series
• 1970-1973 Honda SL175K, SL90, SS125A
• 1966-1979 Honda CT90, CT200, CL125A, CL160, CL175K, and others

Kawasaki:

• 1986-1984 Kawasaki KLT110, Z1 900, ZR1100, and ZRX1200R models

Suzuki:

• 1980-1991 Suzuki DR350, LT125, LT160, LT230E, LT250, and LT500 series
• 1990-1996 Suzuki GSX series (GSX-R600, GSX-R750, GSX1300R Hayabusa)

Yamaha:

• 1983-1998 Yamaha YFB250, YFM200, YFM225, YFM250 series
• 1998-2008 Yamaha TT-R250, WR250, FZS1000 FZ1, and others

Benefits:

• Improved Heat Dissipation: The copper core ensures that heat is efficiently removed from the spark plug, reducing the risk of overheating and prolonging the plug’s life.
• Enhanced Durability: NGK’s high-quality ceramic insulator and copper core construction provide superior strength and better heat transfer, making this plug more durable in high-temperature conditions.
• Optimized Performance: This spark plug is ideal for vintage motorcycles and small engines, offering consistent ignition and reliable performance under various conditions.

Plug Construction:

• Copper Core: Ensures efficient heat removal, preventing overheating and prolonging plug life.
• Triple Seals: Prevents interior leakage and further aids in heat dissipation.
• Corrugated Ribs: Help prevent flashover, ensuring a stable spark for reliable engine operation.

Additional Information:

• Does Not Include Terminal Nut: If necessary, order part #067606-0051 separately.
• Traditional Spark Plug: Designed for longer life and better performance in high-stress engine applications, particularly in vintage motorcycles and small engines.

The NGK D8HA Spark Plug offers excellent heat management and performance for high-stress and high-temperature engine conditions. It is a reliable choice for vintage motorcycle enthusiasts and small engine users looking for long-lasting and high-performance spark plugs.