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NGK 3998 Spark Plug
| Brand | NGK 3998 |
|---|---|
| Resistance | 1 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .024 |
| Ground Electrode Quantity | 1 |
| Hex Size | 13/16 |
| Insulator Height | 55.00 |
| Manufacturer Heat Range | 9 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 14.00 |
| Part Number | B9eg solid |
| Stock Number | 3998 |
| Product line | Racing Spark Plug |
| Fits | Kawasaki · 5 vehicles |
Racing design. Built for ignition performance in demanding small-engine use.
Copper core. Helps transfer heat efficiently for stable plug operation.
Pre-gapped. Set to 0.024 inches before installation, with fitment notes calling for adjustment.
Cross-references NGK 3998 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Racing Spark Plug Overview
The NGK 3998 racing spark plug is built for small-displacement Kawasaki two-stroke applications that call for a flat-seat plug with a 14 mm thread and 0.75-inch reach. It uses a copper core center electrode, nickel tip materials, and a standard ground design for consistent ignition performance in demanding use.
Key Features
- NGK 3998 spark plug with a 1-resistor design for ignition noise control.
- Copper core center electrode for stable heat transfer.
- Nickel center and ground electrode tip materials.
- Flat seat, 14 mm thread diameter, and 0.75-inch reach.
- Pre-gapped to 0.024 inches, with fitment notes calling for adjustment to 0.032 inches.
Detailed Description
This NGK B9EG SOLID spark plug is specified for Kawasaki KX60 models and is identified by part number 3998. The racing-oriented construction uses a standard ground configuration, a single ground electrode, and a 13/16 hex size for service access. With a manufacturer heat range of 9, it is suited to applications that require a colder plug specification. This part cross-references NGK (e.g., 3998) for the same application.
Fits 1999-2001 Kawasaki KX60, N/A. Fits 2002-2003 Kawasaki KX60, N/A.
What It Is Used For
- Restoring reliable spark in a worn or fouled plug.
- Replacing a plug with the correct heat range and reach.
- Addressing misfire, hard-start, or inconsistent combustion symptoms.
- Maintaining proper ignition performance in Kawasaki KX60 applications.
Installation Notes and Tips
Verify the thread diameter, seat type, reach, and heat range before installation. The fitment notes specify a spark plug gap adjustment to 0.032 inches for the listed Kawasaki KX60 applications. Confirm the final gap against the engine specification before use.
Quality Assurance
NGK is a recognized ignition component manufacturer, and this spark plug follows the B9EG SOLID specification identified by part number 3998.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 2003 | Kawasaki | KX60 | -L | -- | Adjust spark plug gap to 0.032 inches.; Racing Spark Plug |
| 2002 | Kawasaki | KX60 | -L | -- | Adjust spark plug gap to 0.032 inches.; Racing Spark Plug |
| 2001 | Kawasaki | KX60 | -L | -- | KX60-B; Gap 0.032"; Racing Spark Plug |
| 2000 | Kawasaki | KX60 | -L | -- | KX60-B; Gap 0.032"; Racing Spark Plug |
| 1999 | Kawasaki | KX60 | -L | -- | KX60-B; Gap 0.032"; Racing Spark Plug |
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