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2007–2011 Yamaha WR450F 12-Coil 4-Wire Stator 5TJ-81410-51
2007–2011 Yamaha WR450F 12-Coil 4-Wire Stator 5TJ-81410-51
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Product Overview
Replace a weak, burned, or failed stator with this 12-coil 4-wire magneto stator, designed for select 2007–2011 Yamaha WR450F dirt bikes using OEM reference numbers 5TJ-81410-51-00, 5TJ-81410-40-00, and 5TJ-81410-50-00.
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 WR450F 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 | WR450F | 2007–2011 | 5TJ-81410-51-00 / 5TJ-81410-40-00 / 5TJ-81410-50-00 | Main fitment; confirm original stator and connector layout |
| Yamaha | WR 450 F | 2007–2011 | 5TJ-81410-51-00 / 5TJ-81410-40-00 / 5TJ-81410-50-00 | Model-name variation; verify original part before ordering |
| Yamaha | WR450F Dirt Bike | 2007–2011 | 5TJ-81410-51-00 | Fits matching 12-coil 4-wire stator version only |
Important Fitment Note:
This part is not selected by model name alone. Yamaha WR450F 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, 84mm outer diameter, 40mm mounting hole distance, 34mm trigger mounting hole distance, and 21mm thickness before ordering.
Specifications
| Specification | Details |
| Product Type | Magneto Stator / Ignition Generator Coil |
| Coil Count | 12 Coils / 12 Poles |
| Wire Count | 4 Wire |
| Electrical Type | DC |
| Inner Diameter | 31mm / 1.2" |
| Outer Diameter | 84mm / 3.3" |
| Iron Core Height | 10mm / 0.39" |
| Mounting Hole Distance | 40mm / 1.6" |
| Thickness | 21mm / 0.83" |
| Trigger Mounting Hole Distance | 34mm / 1.3" |
| OEM Reference | 5TJ-81410-51-00 / 5TJ-81410-40-00 / 5TJ-81410-50-00 |
| Application | Dirt Bike Charging / Ignition System |
| Compatible Brand | Yamaha |
| Material | Metal Lamination Core + Copper Winding |
Key Features
- Designed for select 2007–2011 Yamaha WR450F dirt bikes
- Replaces common OEM references 5TJ-81410-51-00, 5TJ-81410-40-00, and 5TJ-81410-50-00
- 12-coil 4-wire stator helps support charging and ignition system output
- Includes trigger coil position for matching WR450F 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 |
| 5TJ-81410-51-00 | Main Yamaha WR450F stator reference for 2007–2011 applications |
| 5TJ814105100 | Compact format of 5TJ-81410-51-00 |
| 5TJ-81410-40-00 | Common related WR450F stator reference |
| 5TJ814104000 | Compact format of 5TJ-81410-40-00 |
| 5TJ-81410-50-00 | Common related WR450F stator reference |
| 5TJ814105000 | Compact format of 5TJ-81410-50-00 |
| 5TJ-81410-51 | Short aftermarket format |
| 5TJ-81410-40 | Short aftermarket format |
| 5TJ-81410-50 | Short aftermarket format |
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 WR450F models from 2007–2011 using OEM reference numbers 5TJ-81410-51-00, 5TJ-81410-40-00, or 5TJ-81410-50-00. Please compare your original stator’s OEM number, wire count, connector layout, inner diameter, outer diameter, mounting hole distance, trigger coil position, thickness, 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 5TJ-81410-51-00, 5TJ-81410-40-00, and 5TJ-81410-50-00. 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, trigger mounting position, and stator thickness.
What models or situations does this part not fit?
This part does not fit Yamaha WR450F, YZ450F, WR250F, YZ250F, 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, stator thickness, and overall shape. For best fitment, compare the product photos and specifications with your original stator before purchase.