NGK 6263 Spark Plug

NGK CR9E Spark Plug for Reliable Ignition

The NGK Standard Spark Plug 6263 is built for consistent ignition performance in a wide range of motorcycle, marine, and small engine applications. As an NGK CR9E spark plug, it combines a copper center electrode core with a nickel tip and a nickel ground electrode for dependable spark delivery and stable operation.

NGK’s Standard Spark Plug line focuses on OE-style construction and broad application coverage. For riders and technicians looking for an NGK CR9E replacement, part number 6263 offers the core specifications needed for proper heat control, fit, and electrical performance.

Key Features

• Part number 6263, NGK CR9E spark plug
• Copper center electrode core with nickel tip material
• Nickel ground electrode with standard configuration
• 5,000 ohm resistor for electrical noise suppression
• Pre-gapped at .032 inch
• Flat seat design with .75 inch reach
• 10 mm thread diameter and 5/8 inch hex size
• Manufacturer heat range 9
• Stud terminal type

Detailed Description

NGK 6263 is a standard spark plug engineered around OE-style dimensions and materials. The CR9E specification includes a copper core center electrode for efficient heat transfer, a nickel center tip, and a nickel ground electrode with a single-electrode layout. With a .032 pre-gap, 10 mm thread diameter, flat seat, and .75 reach, this plug is built to match the requirements of engines that call for the CR9E configuration. It is a direct NGK CR9E replacement for applications that specify this part number, including select Honda, Yamaha, and Kawasaki models where the correct heat range and terminal style are critical.

This part cross-references AMS Automotive 4131 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 tied to incorrect plug heat range or gap
• Loss of throttle response from degraded ignition performance
• Electrical interference in ignition systems that require a resistor plug

Installation Notes and Tips

Verify the engine calls for NGK CR9E / 6263 before installation. Confirm thread diameter, reach, seat type, and terminal style match the original specification. Check the gap against the engine manufacturer’s requirement before installing, even though this plug is pre-gapped at .032 inch. Use proper torque procedures to avoid thread damage and ensure correct sealing at the flat seat.

For fitment-based searches, this NGK spark plug is commonly sought for CR9E applications on select Honda, Yamaha, and Kawasaki motorcycles. Always match the part number and engine specification before ordering.

Quality Assurance

NGK is a long-established OE supplier with extensive North American and global manufacturing and distribution capability. The Standard Spark Plug line is built to original-equipment standards for durability and operational consistency across the applications it serves.