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2007–2020 Kawasaki KFX90 KSF90 Mongoose 90 8-Coil 3-Wire Stator
2007–2020 Kawasaki KFX90 KSF90 Mongoose 90 8-Coil 3-Wire Stator
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Product Overview
Replace a weak, burned, or failed stator with this 8-coil 3-wire magneto stator, designed for select Kawasaki KFX90 / KSF90 and KYMCO Mongoose 90 ATV models using reference numbers 21003-Y002, 21003-Y005, 21003-Y006, and 31120-LBD4-900.
The stator is an important part of the ATV charging and ignition system. It helps generate electrical power while the engine is running, supporting the ignition circuit, battery, lights, and other electrical components. If your Kawasaki KFX90, KSF90, or KYMCO Mongoose 90 has weak charging, poor spark, dim lights, unstable voltage, hard starting, or stator-related electrical failure, replacing the stator may help restore normal electrical performance.
Built with a metal lamination core and copper windings, this replacement stator is designed for stable conductivity, heat resistance, and reliable off-road use. Please compare your original stator’s OEM/reference number, coil count, wire count, connector layout, trigger coil position, mounting hole distance, and dimensions before ordering.
Product Compatibility
| Make | Model | Year Range | OEM / Reference Number | Fitment Notes |
|---|---|---|---|---|
| Kawasaki | KFX90 / KSF90 | 2007–2020 | 21003-Y002 / 21003-Y005 / 21003-Y006 | Main fitment; confirm original stator size and plug layout |
| Kawasaki | KFX 90 / KSF 90 ATV | 2007–2020 | 21003-Y002 / 21003-Y005 / 21003-Y006 | Model-name variation; verify original stator before ordering |
| KYMCO | Mongoose 90 | 2007–2018 | 31120-LBD4-900 | Main KYMCO fitment; compare connector and dimensions |
| KYMCO | KXR 90 Euro 2 | 2004–2006 | 31120-LBD4-900 / related references | Possible related fitment; verify original part |
| KYMCO | Maxxer 90 | 2010–2016 | 31120-LBD4-900 / related references | Fits matching 8-coil 3-wire stator version only |
| KYMCO | Maxxer 90S | 2017–2020 | 31120-LBD4-900 / related references | Confirm wire count, plug style, and trigger coil position |
| ATV / Quad | 90cc Youth ATV Platform | Select applications | Listed references | Match by OEM number, size, and connector layout |
Important Fitment Note:
Some aftermarket listings extend Kawasaki KFX90 / KSF90 fitment beyond 2020. This product page uses the conservative 2007–2020 range from the provided product data. If your original stator matches the same OEM/reference number, 8-coil / 3-wire layout, connector style, 29mm inner diameter, 88mm outer diameter, 40mm mounting hole distance, and trigger coil position, it may fit related later applications as well. Always compare the original part before ordering.
Specifications
| Specification | Details |
| Product Type | Magneto Stator / Generator Stator Coil |
| Coil Count | 8 Coils / 8 Poles |
| Wire Count | 3 Wire |
| Electrical Type | DC |
| Outer Diameter | 88mm / 3.5" |
| Inner Diameter | 29mm / 1.1" |
| Mounting Hole Distance | 40mm / 1.6" |
| Trigger Mounting Hole Distance | 34mm / 1.3" |
| OEM / Reference Number | 21003-Y002 / 21003-Y005 / 21003-Y006 / 31120-LBD4-900 |
| Application | ATV / Quad Charging & Ignition System |
| Compatible Brands | Kawasaki, KYMCO |
| Material | Metal Lamination Core + Copper Winding |
Key Features
- Designed for select Kawasaki KFX90 / KSF90 youth ATV models
- Fits compatible KYMCO Mongoose 90, KXR 90, Maxxer 90, and Maxxer 90S applications when the original stator matches
- Replaces common references 21003-Y002, 21003-Y005, 21003-Y006, and 31120-LBD4-900
- 8-coil 3-wire DC stator helps support charging and ignition system output
- Includes trigger coil position for matching applications
- Helps address weak charging, poor spark, hard starting, dim lights, unstable voltage, or stator failure
- Direct replacement style, but original reference number, connector layout, and dimensions must be checked before installation
OEM Cross Reference
| OEM / Reference Number | Notes |
| 21003-Y002 | Common Kawasaki KFX90 / KSF90 stator reference |
| 21003-Y005 | Common Kawasaki KFX90 / KSF90 stator reference |
| 21003-Y006 | Common Kawasaki KFX90 / KSF90 stator reference |
| 31120-LBD4-900 | Common KYMCO Mongoose 90 / Maxxer 90 / KXR 90 stator reference |
| 31120-LBD4-90A | Possible related KYMCO reference on some aftermarket listings |
| 31120-LBD4-90B | Possible related KYMCO reference on some aftermarket listings |
Please use the OEM/reference number together with physical dimensions and connector layout for fitment confirmation. If your original stator has a different wire count, outer diameter, inner diameter, trigger coil position, mounting hole spacing, thickness, or plug style, this part may not fit.
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Fitment FAQ
Will this part fit my specific model and year?
This stator is designed for select Kawasaki KFX90 / KSF90 models from 2007–2020 and KYMCO Mongoose 90 models from 2007–2018 using matching reference numbers. It may also fit select KYMCO KXR 90, Maxxer 90, and Maxxer 90S applications when the original stator matches. Please compare your original stator’s OEM/reference number, wire count, connector layout, inner diameter, outer diameter, mounting hole distance, trigger coil position, and overall shape before ordering.
Do I need to match the OEM part number?
Yes, matching the OEM or reference number is strongly recommended. This stator replaces 21003-Y002, 21003-Y005, 21003-Y006, and 31120-LBD4-900. However, OEM number alone is not enough. Please also confirm the 8-coil 3-wire layout, DC electrical type, plug style, inner diameter, outer diameter, mounting hole distance, and trigger mounting position.
What models or situations does this part not fit?
This part does not fit Kawasaki KFX90, KSF90, KYMCO Mongoose 90, Maxxer 90, or other 90cc ATV models that use a different stator diameter, different wire count, different connector layout, different trigger coil position, different mounting hole spacing, or a different charging system design. It is also not a replacement for the CDI, ignition coil, regulator rectifier, battery, flywheel, starter motor, or complete wiring harness.
What should I check before ordering?
Before ordering, please check your ATV’s make, model, year, OEM/reference number, original stator coil count, wire count, connector shape, inner diameter, outer diameter, mounting hole distance, trigger coil position, and overall shape. For best fitment, compare the product photos and specifications with your original stator before purchase.