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Yamaha YFZ450R YFZ450RSE Starter Motor 2009–2024 | 18P-81890-00-00
Yamaha YFZ450R YFZ450RSE Starter Motor 2009–2024 | 18P-81890-00-00
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Product Overview
Restore reliable electric starting performance to your Yamaha YFZ450R ATV with this 12V 9-tooth starter motor.
Designed to replace Yamaha OEM 18P-81890-00-00, this starter motor helps deliver dependable cranking power for compatible Yamaha YFZ450R and YFZ450R Special Edition models. It is a practical replacement for common starter-related problems such as slow cranking, no-start issues, intermittent starter engagement, worn internal brushes, or a failed original starter motor.
Product Compatibility
| Brand | Model | Sub-Model / Notes | Year Range | OEM Reference |
|---|---|---|---|---|
| Yamaha | YFZ450R | Standard model | 2009–2024 | 18P-81890-00-00 |
| Yamaha | YFZ450R Special Edition | YFZ450RSE / SE model | 2009–2024 | 18P-81890-00-00 |
| Yamaha | YFZ450R Custom Graphics | Special graphics edition | 2012–2013 | 18P-81890-00-00 |
| Yamaha | YFZ450 | Select 450 ATV applications; verify before purchase | 2009–2024 | 18P-81890-00-00 |
| Yamaha | YFZ450 Special Edition | SE application | 2011 | 18P-81890-00-00 |
| Yamaha | YFZ450 Bill Ballance Edition | Special edition application | 2010 | 18P-81890-00-00 |
OEM Cross Reference
| OEM / Interchange Number | Brand / Reference | Notes |
|---|---|---|
| 18P-81890-00-00 | Yamaha | Main starter motor assembly number |
| 18P818900000 | Yamaha format | Same OEM number without dashes |
| 18P-81890-00 | Shortened format | Common marketplace listing format |
Specifications
| Specification | Details |
|---|---|
| Product Type | Electric Starter Motor |
| Voltage | 12V |
| Gear Teeth | 9 Teeth |
| Rotation | Clockwise / CW |
| Replacement OEM Number | 18P-81890-00-00 |
| Application | Yamaha YFZ450R / YFZ450RSE ATV starting system |
| Vehicle Type | ATV / Quad |
| Installation | Direct replacement when OEM number and dimensions match |
Key Features
- Replaces Yamaha starter motor number 18P-81890-00-00
- Designed for Yamaha YFZ450R and YFZ450R Special Edition applications
- 12V 9-tooth starter motor with clockwise rotation
- Helps restore reliable cranking and electric starting performance
- Practical replacement for a weak, worn, or failed original starter motor
- Built for ATV riding conditions and starting-system repair
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Fitment FAQ
Will this part fit my specific model and year?
This starter motor is intended for OEM Reference; Yamaha; YFZ450R; Standard model; 2009–2024; 18P-81890-00-00. It is best matched to original part number(s) 18P-81890-00-00, 18P-81890-00. Key physical/spec details from the product data include Restore reliable electric starting performance to your Yamaha YFZ450R ATV with this 12V 9-tooth starter motor., Voltage: 12V, Gear Teeth: 9 Teeth. 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 18P-81890-00-00, 18P-81890-00 before purchase. For this starter motor, also compare the OEM number, voltage, tooth count, rotation direction, mounting ears, bolt spacing, terminal type, and overall length. This is especially important for Yamaha YFZ450R 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 starter motor for machines outside the listed compatibility, or for units with different tooth counts, CW/CCW rotation, mounting ears, terminal locations, or voltage ratings. If your original part number does not cross-reference with 18P-81890-00-00, 18P-81890-00, treat the fitment as unconfirmed. Model years outside 2009–2024, 2012–2013, 2009, 2024, 2012 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, voltage, tooth count, rotation direction, mounting ears, bolt spacing, terminal type, and overall length. Confirm OEM/cross-reference number(s): 18P-81890-00-00, 18P-81890-00. Recheck listed specs such as Restore reliable electric starting performance to your Yamaha YFZ450R ATV with this 12V 9-tooth starter motor., Voltage: 12V, Gear Teeth: 9 Teeth. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.