NGK 5829 Spark Plug

NGK DP8EA-9 Spark Plug Overview

NGK 5829 is a standard spark plug built for dependable ignition performance in a wide range of domestic and import applications. This NGK Standard Spark Plug uses a copper center electrode with nickel tip materials and a nickel ground electrode to support consistent spark delivery and stable combustion.

With a 12 mm thread diameter, .75 reach, flat seat, 18 mm hex, and .036 pre-gap, part number DP8EA-9 is a direct-fit style spark plug for service work where OE-style dimensions matter. It is a practical choice for riders and technicians searching for NGK 5829, DP8EA-9, or a standard replacement spark plug for motorcycle and small-engine applications.

Key Features

• NGK Standard Spark Plug line for OE-style service replacement
• Part number DP8EA-9 / stock number 5829
• Copper center electrode core for reliable conductivity
• Nickel center and ground electrode tip materials
• Standard ground electrode design with one ground electrode
• 1 ohm resistance for ignition system compatibility
• .036 pre-gap size for specified applications
• 12 mm thread diameter, .75 reach, flat seat, and 18 mm hex

Product Details

NGK has long supplied spark plugs for automotive, motorcycle, marine, and small-engine use, and this Standard Spark Plug reflects that OE-focused approach. The DP8EA-9 configuration is built around common service dimensions and a standard electrode layout, making it a straightforward replacement when the original plug calls for the same thread, reach, seat type, and heat range 8 specification.

This part cross-references Monroe Shocks & Struts (e.g., 5829) for the same application. For search relevance, shoppers often look for NGK 5829, DP8EA-9, or a standard NGK spark plug for Honda motorcycle and small-engine service. When the application calls for this exact plug specification, it supports consistent ignition performance and routine maintenance intervals.

Common Problems This Part Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions tied to aged ignition components
• Reduced throttle response from degraded plug performance
• Maintenance replacement for specified motorcycle or small-engine applications

Installation Notes and Tips

Verify the required thread diameter, reach, seat type, heat range, and pre-gap before installation. Use the vehicle or equipment service specification to confirm that NGK 5829 / DP8EA-9 is the correct spark plug for the application. Inspect the ignition lead, coil, and plug well condition during service, and follow the manufacturer’s torque specification when installing.

For fitment-based searches, this part is commonly referenced for Honda motorcycle and small-engine applications where the specified plug dimensions match the original equipment requirement. Always confirm the exact application before installation.

Quality Assurance

NGK is a major OE spark plug supplier with decades of manufacturing experience and a reputation built on original-equipment standards, broad vehicle coverage, and controlled production processes. Part number 5829 is produced to meet the dimensional and performance requirements associated with the DP8EA-9 specification.