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NGK 5423 Spark Plug
| Brand | NGK 5423 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Stud |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 18 |
| Insulator Height | 50.50 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 12.00 |
| Part Number | Dr8es |
| Stock Number | 5423 |
| Product line | Standard Spark Plug |
| Fits | Honda, Kawasaki, and Suzuki · 24 vehicles |
OE-style replacement. Built to original-equipment standards for routine ignition service.
Copper core design. Supports stable conductivity and consistent spark delivery.
Standard spark plug. Uses nickel electrode materials and a flat seat construction.
Cross-references Carlson 7700, NGK 5423 and Standard Ignition 7701 for the same application. See all 10.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Overview
NGK 5423 is a standard spark plug built to OE-style specifications for a range of motorcycles and ATVs. It uses a copper center electrode core, nickel center and ground electrode tips, and a 0.028 in. pre-gap for consistent ignition performance.
Compatible with Kawasaki KLF250 Bayou, Honda TRX300X, Honda CB1100F, and Suzuki GSX600F Katana applications, this NGK spark plug is identified by part number 5423 and stock number DR8ES.
Key Features
- Standard spark plug design for routine ignition service
- Copper core center electrode for stable conductivity
- Nickel electrode materials for conventional wear characteristics
- 0.028 in. pre-gap and flat seat construction
- Stud terminal with 12 mm thread diameter and 18 mm hex size
Detailed Description
NGK 5423, also referenced as DR8ES, is a standard spark plug engineered around original-equipment dimensions and materials. The plug features a 0.75 in. reach, flat seat, 12 mm thread diameter, and a 5 k? resistor, along with a standard ground configuration and single ground electrode. Its heat range 8 specification and nickel-tipped electrodes make it a direct service part for selected Honda, Kawasaki, and Suzuki engines, including Kawasaki KLF250 Bayou, Honda TRX300X, and Suzuki GSX600F Katana applications.
NGK’s OE supplier background and long manufacturing history support this plug’s role as a service replacement for ignition maintenance. The DR8ES specification and part number 5423 are useful references when matching the correct spark plug for the listed fitments.
What It Is Used For
- Restoring weak or inconsistent spark output
- Replacing worn electrodes that can affect combustion quality
- Addressing hard starting caused by plug wear or fouling
- Correcting misfire symptoms tied to ignition service intervals
- Maintaining proper ignition performance in listed powersports and motorcycle applications
Installation Notes and Tips
Verify the specified gap before installation and confirm the seat type, thread diameter, reach, and heat range match the engine requirements. Use the vehicle’s service specifications for final torque and inspection procedures. Fitment includes 1982-2011 Honda, Kawasaki, and Suzuki applications as listed, and the part number 5423 should be matched to the OE reference DR8ES when cross-checking service data.
Quality Assurance
NGK is a major OE spark plug supplier in North America and manufactures to original equipment standards for durability and operational performance. This part cross-references Standard Ignition (e.g., 7701) for the same application.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 2011 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2010 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2009 | Honda | TRX300X | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2008 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2007 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2006 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2005 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2004 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2003 | Kawasaki | KLF250 Bayou | -L | -- | Gap 0.028"; Actual OE Manufacturer; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2002 | Kawasaki | KLF220 Bayou | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2001 | Kawasaki | KLF220 Bayou | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 2000 | Kawasaki | KLF220 Bayou | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1995 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1994 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1993 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1992 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1991 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1990 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1989 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1988 | Suzuki | GSX600F Katana | -L | -- | Gap 0.026"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1983 | Honda | CB1000C Custom | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1983 | Honda | CB1100F | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1982 | Honda | CB900C Custom | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
| 1982 | Honda | CB900F Super Sport | -L | -- | Gap 0.028"; Sell Out and Reorder DR8EA (Stock # 7162); Standard Spark Plug |
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