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NGK 6821 Spark Plug
| Brand | NGK 6821 |
|---|---|
| Resistance | 1 |
| 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 | 5/8 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .5 |
| Thread Diameter | 10.00 |
| Part Number | C8hsa |
| Stock Number | 6821 |
| Product line | Standard Spark Plug |
| Fits | Kawasaki · 1 vehicle |
OE-style replacement. Built to original equipment standards for dependable ignition service.
Copper core design. Promotes efficient heat transfer for stable spark plug operation.
Standard spark plug. Features a flat seat, stud terminal, and 0.028-inch pre-gap.
Cross-references Anchor 2794, BENDIX PREMIUM BRAKE SHOES 889 and DENSO Auto Parts 4009 for the same application. See all 10.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Overview
NGK 6821 is a standard spark plug built for the 1986 Kawasaki EX250F Ninja 250R. It uses a copper core center electrode, nickel tip materials, and a standard ground electrode layout for consistent ignition performance. The flat seat and 0.028-inch pre-gap support direct replacement service on this application.
Key Features
- Standard spark plug design for routine ignition service
- Copper core center electrode for efficient heat transfer
- Nickel center and ground electrode tip materials
- Flat seat construction with 0.5-inch reach
- 1-resistor design with a 10 mm thread diameter
- Part number 6821, NGK C8HSA
Product Details
NGK 6821, also identified as C8HSA, is an OE-style spark plug engineered to meet original equipment standards. The standard ground configuration, stud terminal, and 5/8-inch hex size make it a straightforward service part for ignition maintenance. This spark plug is specified for the Kawasaki EX250F Ninja 250R and is built to support stable combustion and reliable spark delivery in the correct application.
Common Uses
- Replacing a worn or fouled spark plug
- Restoring weak ignition performance
- Addressing hard starting caused by plug wear
- Correcting misfire symptoms related to spark degradation
Installation Notes
Verify the thread diameter, reach, seat type, and pre-gap before installation. Confirm the application matches the Kawasaki EX250F Ninja 250R and use the specified gap setting for the engine. The part number 6821 should be checked against the existing plug specification before service.
Quality Assurance
NGK is a major OE spark plug supplier in North America with more than 80 years of automotive experience. Its manufacturing and distribution network supports original equipment standards for durability and operational performance.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 1986 | Kawasaki | EX250F Ninja 250R | -L | -- | EX250-E; Gap 0.028"; Standard Spark Plug |
| No rows match your filter. | |||||