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2004–2014 Yamaha WR250F 12-Coil 4-Wire Stator 5UM-81410-09
2004–2014 Yamaha WR250F 12-Coil 4-Wire Stator 5UM-81410-09
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Product Overview
Replace a weak, burned, or failed stator with this 12-coil 4-wire ignition magneto stator, designed for select Yamaha WR250F dirt bikes from 2004–2009 and 2011–2014 using OEM reference number 5UM-81410-09-00.
The stator is an important part of the dirt bike charging and ignition system. It helps generate electrical power while the engine is running, supporting the ignition circuit, battery, lights, and related electrical components. If your Yamaha WR250F has weak charging, low battery voltage, no spark, weak spark, hard starting, dim lights, 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 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 |
|---|---|---|---|---|
| Yamaha | WR250F | 2004–2009 | 5UM-81410-09-00 / 5UM-81410-31-00 | Main fitment; confirm original stator and connector layout |
| Yamaha | WR250F | 2011–2014 | 5UM-81410-09-00 / 5UM-81410-31-00 | Fits matching 12-coil 4-wire stator version |
| Yamaha | WR 250 F / WR250 | Select 2004–2014 applications | 5UM-81410-09-00 / related references | Model-name variation; verify original part before ordering |
| Yamaha | WR250F Dirt Bike | 2004–2009 / 2011–2014 | 5UM-81410-09-00 | Match by OEM number, plug layout, and physical size |
Important Fitment Note:
This part is not selected by model name alone. Yamaha WR250F models may use different stator versions depending on year, market, wiring system, and production version. Please confirm your original stator matches the 12-coil / 4-wire layout, DC type, connector style, trigger coil position, 31mm inner diameter, 85mm outer diameter, 40mm mounting hole distance, and 34mm trigger mounting hole distance before ordering.
Specifications
| Specification | Details |
| Product Type | Ignition Stator / Magneto Generator Coil |
| Coil Count | 12 Coils / 12 Poles |
| Wire Count | 4 Wire |
| Electrical Type | DC |
| Outer Diameter | 85mm / 3.3" |
| Inner Diameter | 31mm / 1.2" |
| Mounting Hole Distance | 40mm / 1.6" |
| Trigger Mounting Hole Distance | 34mm / 1.3" |
| Main OEM Reference | 5UM-81410-09-00 |
| Common Cross Reference | 5UM-81410-31-00 |
| Application | Dirt Bike Charging / Ignition System |
| Compatible Brand | Yamaha |
| Material | Metal Lamination Core + Copper Winding |
Key Features
- Designed for select Yamaha WR250F dirt bikes from 2004–2009 and 2011–2014
- Replaces OEM reference number 5UM-81410-09-00
- 12-coil 4-wire stator helps support charging and ignition system output
- Includes trigger coil position for matching WR250F applications
- Helps address no spark, weak spark, hard starting, weak charging, dim lights, or stator failure
- Copper winding supports stable conductivity and improved heat resistance
- Direct replacement style, but original OEM number, connector layout, and dimensions must be checked before installation
OEM Cross Reference
| OEM / Reference Number | Notes |
| 5UM-81410-09-00 | Main Yamaha WR250F stator reference supplied for this product |
| 5UM814100900 | Compact format of 5UM-81410-09-00 |
| 5UM-81410-31-00 | Common related WR250F stator reference on aftermarket listings |
| 5UM814103100 | Compact format of 5UM-81410-31-00 |
| 5UM-81410-10-00 | Possible related WR250F stator reference; verify before purchase |
| 5UM-81410-20-00 | Possible related WR250F stator reference; verify before purchase |
| 5UM-81410-30-00 | Possible related WR250F stator reference; verify before purchase |
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 Yamaha WR250F models from 2004–2009 and 2011–2014 using OEM reference number 5UM-81410-09-00. Please compare your original stator’s OEM 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 5UM-81410-09-00 and may cross-reference with 5UM-81410-31-00 on some aftermarket listings. However, OEM number alone is not enough. Please also confirm the 12-coil 4-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 Yamaha WR250F, YZ250F, WR450F, YZ450F, or other Yamaha dirt bike models that use a different stator diameter, different wire count, different connector layout, different trigger coil position, or different charging system design. It is also not a replacement for the regulator rectifier, CDI, ignition coil, battery, flywheel, starter motor, or complete wiring harness.
What should I check before ordering?
Before ordering, please check your dirt bike’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.