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9-Tooth Starter Motor for Yamaha Big Bear 350 400 Kodiak 400 Wolverine 350
9-Tooth Starter Motor for Yamaha Big Bear 350 400 Kodiak 400 Wolverine 350
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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 Yamaha Big Bear 350, Big Bear 400, Kodiak 400, Wolverine 350, YFM350, and YFM400 ATV applications.
The starter motor helps crank the engine when the electric start button is pressed. A failing starter motor may cause slow cranking, clicking, intermittent starting, no-crank issues, grinding noise, or failure to start even when the battery is charged.
This replacement starter motor features a 9-tooth gear and CW 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 |
|---|---|---|---|---|
| Yamaha | Big Bear 350 / YFM350 | Select 1996–1999 applications | 4KB-81800-00 / 4KB-81890-00 / 5FU-81800-00 | Confirm original starter gear and body shape |
| Yamaha | Big Bear 400 / YFM400 | Select 2000–2012 applications | 4KB-81890-00 / 4KB-81890-00-00 / 5FU-81800-00 | Main fitment; verify 9-tooth CW starter design |
| Yamaha | Big Bear 400 2WD / 4WD / IRS | Select 2000–2012 applications | 4KB-81890-00 / 5FU-81800-00 | Match by OEM number, mounting layout, and terminal position |
| Yamaha | Kodiak 400 / YFM400 | Select 1999–2002 applications | 4KB-81800-00 / 4KB-81890-00 | Possible related fitment; compare original starter before ordering |
| Yamaha | Wolverine 350 / YFM350FX | Select 1995–2005 applications | 4KB-81800-00 / 4KB-81890-00 / 228000-4140 | Common related fitment; confirm original starter motor |
| Yamaha | YFM350 / YFM400 ATV Platform | Select 1995–2012 applications | Verify original part | Fitment depends on model, year, drive type, and starter motor version |
Important Fitment Note:
This part is not selected by model name alone. Yamaha Big Bear, Kodiak, Wolverine, YFM350, and YFM400 models may use different starter motors depending on year, drive type, trim, engine version, gear count, rotation direction, mounting points, and electrical terminal style. Please confirm your original starter motor matches the listed OEM/reference number, 9-tooth gear, CW rotation, and overall shape before ordering.
Specifications
| Specification | Details |
| Product Type | Electric Starter Motor |
| Compatible Brand | Yamaha |
| Main Compatible Models | Big Bear 350, Big Bear 400, Kodiak 400, Wolverine 350 |
| Main Compatible Platforms | YFM350 / YFM400 ATV |
| Tooth Count | 9 Teeth |
| Rotation Direction | CW |
| Main OEM References | 4KB-81800-00 / 4KB-81890-00 / 5FU-81800-00 |
| Full OEM Formats | 4KB-81800-00-00 / 4KB-81890-00-00 / 5FU-81800-00-00 |
| Aftermarket / Denso Reference | 228000-4140 |
| Common Voltage | 12V ATV Starting System |
| Common Vehicle Type | ATV / Utility ATV |
| 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 Yamaha ATV applications
- Designed for matching Big Bear 350, Big Bear 400, Kodiak 400, Wolverine 350, YFM350, and YFM400 starter systems
- Replaces common Yamaha starter references 4KB-81800-00, 4KB-81890-00, and 5FU-81800-00
- Cross-referenced with aftermarket / Denso-style reference 228000-4140
- 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 |
| 4KB-81800-00 | Common Yamaha Big Bear / Kodiak / Wolverine starter motor reference |
| 4KB8180000 | Compact format of 4KB-81800-00 |
| 4KB-81800-00-00 | Full Yamaha OEM format |
| 4KB818000000 | Compact format of 4KB-81800-00-00 |
| 4KB-81890-00 | Common Yamaha starter motor reference |
| 4KB8189000 | Compact format of 4KB-81890-00 |
| 4KB-81890-00-00 | Full Yamaha OEM format |
| 4KB818900000 | Compact format of 4KB-81890-00-00 |
| 5FU-81800-00 | Common related Yamaha starter motor reference |
| 5FU8180000 | Compact format of 5FU-81800-00 |
| 5FU-81800-00-00 | Full Yamaha OEM format |
| 5FU818000000 | Compact format of 5FU-81800-00-00 |
| FU-81800-00 | Supplier-style shortened reference; verify before purchase |
| FU8180000 | Compact supplier-style format |
| 228000-4140 | Denso / aftermarket starter motor reference |
| 2280004140 | Compact format of 228000-4140 |
| 228000-8910 | Possible related aftermarket starter reference; verify before purchase |
| 2280008910 | Compact format of 228000-8910 |
| SMU0032 | Common aftermarket starter motor reference |
| 410-54046 | Common aftermarket starter motor reference |
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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Fitment FAQ
Will this part fit my specific model and year?
This starter motor is designed for select Yamaha Big Bear 350, Big Bear 400, Kodiak 400, Wolverine 350, YFM350, and YFM400 ATV applications when the original starter matches the listed OEM references and 9-tooth CW design. Because the 1995–2012 range covers multiple Yamaha ATV platforms, please confirm your exact model, year, drive type, original starter number, tooth count, rotation direction, and body shape before ordering.
Do I need to match the OEM part number?
Yes, matching the OEM or reference number is strongly recommended. This starter motor replaces common Yamaha references including 4KB-81800-00, 4KB-81890-00, 5FU-81800-00, and aftermarket reference 228000-4140. However, OEM number alone is not enough. Please also confirm the 9-tooth gear, CW rotation, mounting layout, shaft position, body shape, and terminal style.
What models or situations does this part not fit?
This part does not fit Yamaha Big Bear, Kodiak, Wolverine, Grizzly, Bear Tracker, Timberwolf, Moto-4, or other ATV models 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, CDI / ECU, or complete wiring harness.
What should I check before ordering?
Before ordering, please check your ATV’s make, model, year, trim version, drive type, 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.