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9-Tooth Starter Motor for Honda CB500F CB500X CBR500R 31200-MGZ-J01
9-Tooth Starter Motor for Honda CB500F CB500X CBR500R 31200-MGZ-J01
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Product Overview
Replace a worn, weak, noisy, or failed starter motor with this 9-tooth electric starter motor, designed for select Honda CB500F, CB500X, and CBR500R 500cc motorcycle applications using OEM reference numbers 31200-MGZ-J01 and 31200-MGZ-J81.
The starter motor helps crank the engine when the electric start button is pressed. A failing starter motor may cause slow cranking, clicking, no-crank problems, intermittent starting, grinding noise, or failure to start even when the battery is fully charged.
This replacement starter motor features a 9-tooth gear and CCW rotation based on supplied product data. Please compare your original starter motor’s OEM number, tooth count, rotation direction, mounting points, electrical terminal, body shape, gear position, and overall design before ordering.
Product Compatibility
| Make | Model | Year Range | OEM / Reference Number | Fitment Notes |
|---|---|---|---|---|
| Honda | CB500F | 2013–2018 | 31200-MGZ-J01 / 31200-MGZ-J81 | Main fitment; confirm original starter gear and body shape |
| Honda | CB500F | Select 2019 applications | 31200-MGZ-J01 / related reference | Possible extended fitment; verify original part before ordering |
| Honda | CB500X | 2013–2018 | 31200-MGZ-J81 / 31200-MGZ-J01 | Main adventure model fitment; compare OEM number and starter layout |
| Honda | CB500X | Select 2019–2020 applications | 31200-MGZ-J81 | Possible extended fitment; verify before purchase |
| Honda | CBR500R | 2013–2018 | 31200-MGZ-J01 / 31200-MGZ-J81 | Main sport bike fitment; confirm 9-tooth CCW starter design |
| Honda | CBR500R | Select 2019–2020 applications | 31200-MGZ-J01 | Possible extended fitment; match by OEM number and starter body |
| Honda | 500cc Parallel-Twin Platform | Select applications | Verify original part | Fitment depends on year, market, and starter motor version |
Important Fitment Note:
This part is not selected by model name alone. Honda CB500F, CB500X, CBR500R, and related 500cc platform models may use different starter motors depending on year, market, engine version, gear count, rotation direction, mounting points, and electrical terminal style. Please confirm your original starter motor matches OEM 31200-MGZ-J01 or 31200-MGZ-J81, the 9-tooth gear, CCW rotation, and overall shape before ordering.
Specifications
| Specification | Details |
| Product Type | Electric Starter Motor |
| Compatible Brand | Honda |
| Main Compatible Models | CB500F, CB500X, CBR500R |
| Engine Platform | Honda 500cc Parallel-Twin Motorcycle Platform |
| Tooth Count | 9 Teeth |
| Rotation Direction | CCW |
| Main OEM References | 31200-MGZ-J01 / 31200-MGZ-J81 |
| Common Vehicle Type | Motorcycle |
| Application | Electric Starting System |
| Fitment Type | Replacement, match by OEM number, tooth count, rotation, and mounting style |
Key Features
- 9-tooth electric starter motor for select Honda CB500F, CB500X, and CBR500R motorcycles
- Replaces common Honda starter motor references 31200-MGZ-J01 and 31200-MGZ-J81
- Designed for matching Honda 500cc parallel-twin starter systems
- Helps restore electric start function when the original starter motor is weak, worn, noisy, or failed
- Precision-built replacement style supports stable cranking performance
- Durable starter motor construction supports long service life under normal use
- Direct replacement style, but original gear count, rotation direction, terminal type, and mounting layout must be checked before installation
OEM Cross Reference
| OEM / Reference Number | Notes |
| 31200-MGZ-J01 | Common Honda CB500F / CBR500R starter motor reference |
| 31200MGZJ01 | Compact format of 31200-MGZ-J01 |
| 31200-MGZ-J81 | Common Honda CB500X / related 500cc starter motor reference |
| 31200MGZJ81 | Compact format of 31200-MGZ-J81 |
| 31200-MGZ-J010 | Supplier-style extended format; verify before purchase |
| 31200-MGZ-J810 | Supplier-style extended format; verify before purchase |
Please use the OEM/reference number together with physical fitment checks. If your original starter motor has a different gear tooth count, rotation direction, shaft style, mounting hole layout, electrical terminal, body shape, or mounting position, this part may not fit.
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Preguntas frecuentes sobre compatibilidad
¿Esta pieza es compatible con mi modelo y año específicos?
This starter motor is designed for select Honda CB500F, CB500X, and CBR500R applications when the original starter matches OEM 31200-MGZ-J01 or 31200-MGZ-J81 and the 9-tooth CCW design. Please compare your original starter motor’s part number, tooth count, rotation direction, body shape, mounting points, and electrical terminal before ordering.
¿Necesito que coincida el número de pieza OEM?
Yes, matching the OEM or reference number is strongly recommended. This starter motor replaces Honda references 31200-MGZ-J01 and 31200-MGZ-J81. However, OEM number alone is not enough. Please also confirm the 9-tooth gear, CCW rotation, mounting layout, shaft position, and terminal style.
¿Qué modelos o situaciones no son compatibles con esta pieza?
This part does not fit Honda CB500F, CB500X, CBR500R, Rebel 500, CL500, CBR650R, CB650R, or other motorcycles that use a different starter gear count, different rotation direction, different shaft length, different mounting holes, different terminal style, or different starter body. It is also not a replacement for the battery, starter relay, starter clutch, stator, ignition coil, ECU, or complete wiring harness.
¿Qué debo verificar antes de hacer un pedido?
Before ordering, please check your motorcycle’s make, model, year, engine version, original starter motor OEM number, tooth count, rotation direction, mounting hole layout, electrical terminal, shaft position, starter body shape, and available installation space. For best fitment, compare the product photos and specifications with your original starter motor before purchase.