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Starter Motor for Yamaha Grizzly 450 YFM450 1CT-81890-00
Starter Motor for Yamaha Grizzly 450 YFM450 1CT-81890-00
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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 Grizzly 450 / YFM450 ATV applications from 2011–2014 using OEM reference number 1CT-81890-00-00.
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 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 |
|---|---|---|---|---|
| Yamaha | Grizzly 450 / YFM450FG 4x4 | 2011–2014 | 1CT-81890-00-00 / SMU0516 | Main fitment; confirm original starter gear and body shape |
| Yamaha | Grizzly 450 / YFM450FGH Hunter Edition 4x4 | 2011–2014 | 1CT-81890-00-00 / SMU0516 | Verify 9-tooth gear and CCW rotation |
| Yamaha | Grizzly 450 / YFM450FGP EPS 4x4 | 2011–2014 | 1CT-81890-00-00 / SMU0516 | Main EPS fitment; compare original starter before ordering |
| Yamaha | Grizzly 450 / YFM450FGPH Hunter EPS 4x4 | 2011–2014 | 1CT-81890-00-00 / SMU0516 | Match by OEM number, starter body, and terminal position |
| Yamaha | Grizzly 450 / YFM450D 4x4 | 2014 | 1CT-81890-00-00 | Possible related fitment; verify original starter motor |
| Yamaha | Grizzly 450 / YFM450DAH Hunter Edition 4x4 | 2014 | 1CT-81890-00-00 | Possible related fitment; confirm before purchase |
| Yamaha | YFM450 Grizzly 450 ATV Platform | Select 2011–2014 applications | Verify original part | Fitment depends on model, trim, EPS version, and starter motor design |
Important Fitment Note:
This part is not selected by model name alone. Yamaha Grizzly 450 / YFM450 models may use different starter motors depending on year, trim, EPS configuration, market, gear count, rotation direction, mounting points, and electrical terminal style. Please confirm your original starter motor matches OEM 1CT-81890-00-00, the 9-tooth gear, CCW rotation, and overall shape before ordering.
Specifications
| Specification | Details |
| Product Type | Electric Starter Motor |
| Compatible Brand | Yamaha |
| Main Compatible Model | Grizzly 450 / YFM450 |
| Main Compatible Year Range | 2011–2014 |
| Common Compatible Trims | 4x4, Hunter Edition, EPS, Hunter EPS |
| Voltage | 12V ATV Starting System |
| Tooth Count | 9 Teeth |
| Rotation Direction | CCW / Counter Clockwise |
| Main OEM Reference | 1CT-81890-00-00 |
| Short OEM Format | 1CT-81890-00 |
| Compact OEM Format | 1CT818900000 |
| Aftermarket Reference | SMU0516 |
| 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 Grizzly 450 / YFM450 ATV applications
- Designed for matching 2011–2014 Yamaha Grizzly 450 starter systems
- Replaces Yamaha starter motor reference 1CT-81890-00-00
- Cross-referenced with aftermarket starter number SMU0516
- CCW rotation design for matching Yamaha ATV starting 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 |
| 1CT-81890-00-00 | Main Yamaha starter motor reference |
| 1CT818900000 | Compact format of 1CT-81890-00-00 |
| 1CT-81890-00 | Short OEM-style reference |
| 1CT8189000 | Compact format of 1CT-81890-00 |
| SMU0516 | Common Arrowhead / aftermarket starter motor reference |
| 410-54148 | Common aftermarket starter motor reference on some listings; verify before purchase |
| 19037 | Common aftermarket starter motor reference on some listings; 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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FAQ sur l'ajustement
Cette pièce conviendra-t-elle à mon modèle et à mon année spécifiques ?
This starter motor is designed for select Yamaha Grizzly 450 / YFM450 ATV applications from 2011–2014 when the original starter matches OEM 1CT-81890-00-00 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.
Dois-je correspondre au numéro de pièce OEM ?
Yes, matching the OEM or reference number is strongly recommended. This starter motor replaces Yamaha 1CT-81890-00-00 and cross-references with SMU0516. However, OEM number alone is not enough. Please also confirm the 9-tooth gear, CCW rotation, mounting layout, shaft position, body shape, and terminal style.
À quels modèles ou situations cette pièce ne convient-elle pas ?
This part does not fit Yamaha Grizzly, Kodiak, Big Bear, Wolverine, Raptor, Rhino, Viking, or other Yamaha 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.
Que dois-je vérifier avant de commander ?
Before ordering, please check your ATV’s make, model, year, trim version, EPS configuration, 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.