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Magneto Stator for Honda CRF450R (2009) | OEM 31120-MEN-A31
Magneto Stator for Honda CRF450R (2009) | OEM 31120-MEN-A31
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Product Overview
Restore peak performance to your Honda CRF450R with this high-output magneto stator. Designed specifically for the 2009 fuel-injected model, it delivers stable voltage for the EFI system and ignition—ensuring smooth throttle response, reliable starting, and consistent power delivery on track or trail.
Built with premium copper windings and a durable aluminum base, this stator is engineered to withstand extreme vibration and heat in off-road racing conditions.
Product Compatibility
| Brand | Model | Sub-Model / Notes | Year Range |
|---|---|---|---|
| Honda | CRF450R | Fuel Injection (EFI) | 2009 Only |
- Fits 2009 model only (first-year EFI version)
- Not compatible with carbureted CRF450R models (2002–2008)
Specifications
| Specification | Details |
|---|---|
| OEM Reference | 31120-MEN-A31 |
| Outer Diameter | 98 mm (3.86") |
| Inner Diameter | 35 mm (1.38") |
| Wire Length | 934 mm (36.77") |
| Material | Copper windings + aluminum base |
| Design | Direct plug-and-play |
Key Features
- Designed for EFI-equipped CRF450R engines
- Stable output supports fuel injection and ignition systems
- High-purity copper windings for improved spark performance
- Durable construction for off-road vibration and heat
- Direct-fit design for easy installation
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Fitment FAQ
Will this part fit my specific model and year?
This magneto stator is intended for Honda; CRF450R; Fuel Injection (EFI); 2009 Only; Fits 2009 model only (first-year EFI version); Not compatible with carbureted CRF450R models (2002–2008). It is best matched to original part number(s) 31120-MEN-A31. Key physical/spec details from the product data include Outer Diameter: 98 mm (3.86"), Inner Diameter: 35 mm (1.38"), Wire Length: 934 mm (36.77"). 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-MEN-A31 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 CRF450R/A31 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-MEN-A31, treat the fitment as unconfirmed. Model years outside 2002–2008, 2009, 2002, 2008 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-MEN-A31. Recheck listed specs such as Outer Diameter: 98 mm (3.86"), Inner Diameter: 35 mm (1.38"), Wire Length: 934 mm (36.77"). If any connector, mounting point, size, or year detail is different, confirm fitment before installation.