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Denso 4228 Spark Plug
| Brand | Denso 4228 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | 0.9 |
| Ground Electrode Quantity | 1 |
| Hex Size | 16.0 |
| Manufacturer Heat Range | 20 |
| Seat Type | Flat |
| Reach | 19.00 |
| Thread Diameter | 14.00 |
| Product line | U-Groove Conventional |
| Fits | Victory · 2 vehicles |
U-groove design. Improves spark exposure for more consistent ignitability.
Copper core center. Helps conduct heat efficiently during ignition service.
Conventional replacement. Built to the listed thread, reach, seat, and gap specs.
Cross-references DENSO Auto Parts U20EPR9 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
U-Groove Spark Plug Overview
The Denso 4228 spark plug is a U-Groove Conventional ignition component built for direct engine service. It uses a U-groove ground electrode design to improve ignitability and support more efficient combustion.
Fits 2006-2007 Victory Hammer, N/A. This Denso spark plug is identified by part number 4228 and cross-references Denso Auto Parts U20EPR9 for the same application.
Key Features
- U-groove design promotes stronger spark exposure for improved ignitability.
- Copper core center electrode helps conduct heat efficiently.
- Nickel center and ground electrode tip materials support stable spark performance.
- Standard ground configuration and standard tip design for conventional ignition service.
- 0.9 pre-gap, 14 mm thread diameter, 19 mm reach, and 16 mm hex size.
Detailed Description
The Denso 4228 is part of the U-Groove Conventional line, a spark plug family focused on reliable ignition performance in standard replacement applications. Its U-groove ground electrode shape increases the spark path exposure, which helps the air-fuel mixture ignite more consistently. With a copper core center electrode, nickel tip materials, and a 5000 ohm resistor, this plug is built for controlled spark delivery and stable operation. For riders searching for a Victory Hammer spark plug or a Denso 4228 replacement, this part matches the listed fitment and specifications.
Use this spark plug when servicing ignition systems that require the specified thread diameter, reach, seat type, and heat range. The Denso 4228 is a practical choice for maintaining proper combustion characteristics in the 2006-2007 Victory Hammer, and the U-Groove Conventional design reflects Denso’s focus on ignition efficiency.
Common Issues It Can Address
- Hard starting caused by worn or inefficient spark plugs.
- Rough idle from inconsistent ignition performance.
- Misfire conditions related to degraded electrode surfaces.
- Reduced fuel burn efficiency from weak spark delivery.
- Service replacement needs for the specified ignition setup.
Installation Notes and Tips
Verify thread diameter, reach, seat type, and pre-gap before installation. Confirm the ignition system specification for the 2006-2007 Victory Hammer and follow the manufacturer’s service procedure for torque and gap handling. Inspect the old plug for signs of fouling or abnormal wear to help identify underlying engine issues.
Quality Assurance
Denso is an established ignition component manufacturer, and the U-Groove Conventional line is engineered around improved ignitability and efficient combustion support. Part number 4228 is built to the listed specifications for consistent replacement service.
| Year | Make | Model | Notes |
|---|---|---|---|
| 2007 | Victory | Hammer | U-Groove Conventional |
| 2006 | Victory | Hammer | U-Groove Conventional |
| No rows match your filter. | |||