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Honda CB400 Super Four VTEC NC39 18 Coil 7-Wire Stator 1999–2006
Honda CB400 Super Four VTEC NC39 18 Coil 7-Wire Stator 1999–2006
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Product Overview
Restore reliable charging and ignition performance with this 18 coil 7-wire magneto stator, designed for selected Honda CB400 Super Four VTEC NC39 models from 1999 to 2006.
This replacement stator helps solve common electrical issues such as battery not charging, weak or no spark, hard starting, unstable voltage, and intermittent charging failure.
Built with durable replacement-grade materials, this magneto stator is designed to provide stable electrical output, reliable charging performance, and long service life. It is a practical replacement for a worn, burned, or failing original stator.
Product Compatibility
| Brand | Model | Engine / HP / CC | Year Range | Notes |
|---|---|---|---|---|
| Honda | CB400 Super Four VTEC NC39 | 400cc | 1999–2006 | Verify stator size, wire count, connector style, and original part before purchase |
| Honda | CB400 VTEC Spec 1 / Spec 2 / Spec 3 | 400cc | 1999–2006 | Verify stator size, wire count, connector style, and original part before purchase |
OEM / Cross Reference:
31120-MBW-J21
Specifications
| Specification | Details |
|---|---|
| Part Type | Magneto Stator |
| Configuration | 18 Coil |
| Wire Count | 7 Wires |
| Outer Diameter | 94.5 mm |
| Inner Diameter | 35 mm |
| Material | High-quality replacement-grade stator construction |
| Function | Charging and ignition system support |
| Installation | Direct replacement on correctly matched applications |
| Fitment Method | Match by model, year, stator size, wire count, connector style, and original part layout |
| Condition | 100% New Aftermarket |
Key Features
- 18 Coil / 7-Wire Design – Built for selected CB400 VTEC NC39 charging-system applications
- Stable Power Generation – Helps support reliable charging and ignition performance
- Direct Replacement Style – Designed for easy installation when the dimensions and connector match
- Durable Construction – Made with quality replacement materials for long service life
- Reliable Electrical Performance – Helps restore stable voltage output and starting reliability
Common Problems This Part Can Help Solve
This product may help address issues such as:
- Battery not charging
- Weak or no spark
- Hard starting
- Intermittent electrical failure
- Unstable charging voltage
- Poor ignition performance
- Burned or damaged original stator
Package Includes
1 × 18 Coil 7-Wire Magneto Stator Coil
Fitment Note
Please confirm your vehicle model, year, stator dimensions, wire count, connector style, and original stator appearance before ordering.
This listing is intended for selected Honda CB400 Super Four VTEC NC39 1999–2006 applications. Compatibility may vary by market version and wiring setup, so matching by 94.5 mm outer diameter + 35 mm inner diameter + 18 coil + 7-wire layout + connector style is strongly recommended before purchase.
If you are unsure about compatibility, contact us with your model, year, connector photos, and original stator measurements before purchase.
Installation Note
Professional installation is recommended.
Before installation, inspect related components such as the battery, regulator/rectifier, wiring harness, connectors, flywheel, and charging system to avoid repeat failure caused by another faulty part.
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Fitment FAQ
Will this part fit my specific model and year?
This magneto stator is intended for Engine / HP / CC. Listed year information includes 1999–2006, 1999, 2006. It is best matched to original part number(s) 31120-MBW-J21. Key physical/spec details from the product data include Outer Diameter: 94.5 mm, Inner Diameter: 35 mm, 400cc. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. Match your original part number to 31120-MBW-J21 before purchase. For this magneto stator, also compare the OEM number, outer/inner diameter, core height or thickness, plug shape, wire count, mounting holes, pickup position, and rubber grommet style. This is especially important for Honda CB400/NC39 models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this magneto stator for machines outside the listed compatibility, or for units with different plug layouts, pickup-coil positions, wire counts, stator diameters, or charging/ignition configurations. If your original part number does not cross-reference with 31120-MBW-J21, treat the fitment as unconfirmed. Model years outside 1999–2006, 1999, 2006 should be verified separately. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, outer/inner diameter, core height or thickness, plug shape, wire count, mounting holes, pickup position, and rubber grommet style. Confirm OEM/cross-reference number(s): 31120-MBW-J21. Recheck listed specs such as Outer Diameter: 94.5 mm, Inner Diameter: 35 mm, 400cc. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.