NGK 6955 Spark Plug

NGK CR9EB Standard Spark Plug

The NGK CR9EB standard spark plug is built for dependable ignition performance in a wide range of motorcycle, marine, and small engine applications. As part of NGK’s Standard Spark Plug line, it combines a copper core center electrode with nickel electrode tips for consistent spark delivery and stable operation.

NGK’s OE-focused manufacturing background and broad North American coverage make this plug a practical choice for routine ignition service. If you are searching for an NGK CR9EB spark plug or a direct replacement for part number 6955, this plug is built to match common OEM-style specifications.

Key Features

• Brand: NGK Standard Spark Plug
• Part number: 6955
• NGK part number: CR9EB
• Copper core center electrode for reliable conductivity
• Nickel center and ground electrode tip materials
• Standard ground electrode design with one ground electrode
• 5,000 ohm resistance
• Pre-gapped at .032
• Flat seat design
• 10.00 mm thread diameter, .75 reach, 5/8 hex
• Manufacturer heat range: 9

Product Details

The NGK 6955 spark plug is engineered with a standard ground configuration, non-removable nut terminal, and nickel electrode construction to support steady ignition performance. Its copper core center electrode helps maintain efficient electrical transfer, while the .032 pre-gap supports straightforward service replacement when the specified application calls for this configuration. For riders and technicians looking for an NGK CR9EB plug, this part aligns with common OEM-style ignition requirements.

This spark plug is a fitment-based replacement for select applications that call for the CR9EB specification. It is commonly searched as an NGK spark plug for motorcycle maintenance, small engine tune-up work, and other ignition service needs where the correct thread size, reach, seat type, and heat range matter. Part number 6955 is also referenced in cross-application catalogs for the same application.

This part cross-references Gates 6955 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions related to electrode wear
• Reduced throttle response from weak ignition performance
• Service intervals where the original plug specification is required

Installation Notes and Tips

• Verify the required thread diameter, reach, seat type, and heat range before installation.
• Confirm the specified gap for the application; this plug is pre-gapped at .032.
• Inspect the ignition lead and terminal style to ensure the non-removable nut connection matches the vehicle or equipment.
• Use proper torque during installation to avoid damage to the cylinder head or plug threads.
• For NGK CR9EB applications, compare the old plug’s markings and dimensions before replacement.

Quality Assurance

NGK is a long-established OE supplier with extensive automotive and powersports manufacturing experience. The Standard Spark Plug line reflects NGK’s focus on original-equipment-style specifications, durability, and consistent operational performance across a broad range of applications.