Restore your Yamaha's cranking power with this high-performance starter motor. Specifically engineered for the fuel-injected (EFI) 449cc engine found in the YFZ450R and YFZ450X series, this unit provides the high torque necessary for reliable starts in competitive and recreational off-road environments.
RELIABILITY: Features upgraded copper and silver contacts with high-quality magnets to provide more torque and faster engine turnover than standard budget alternatives.
Key Features
✔ Direct bolt-on OEM replacement
✔ Sealed housings to block debris & moisture
✔ High-torque permanent magnet design
✔ Precision engineered for EFI models
Technical Specs
Voltage:
12V
Rotation:
CW (Clockwise)
Teeth/Splines:
9-Spline Shaft
Starter Type:
PMDD
Compatibility / Fitment Guide
Make
Model
Years
Yamaha
YFZ450R (Fuel Injected)
2009 - 2025
Yamaha
YFZ450X
2010 - 2011
Yamaha
YFZ450R Special Edition
2009 - 2025
OEM Cross Reference
Yamaha OEM
18P-81890-00-00, 18P-81890-01-00
Arrowhead
SMU0515
J&N Electrical
410-54145
Lester
19163
Questions & Answers
Is this a genuine original part?
This is a premium quality 4Drive aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.
Will this fit the older YFZ450 carbureted models?
No. This motor is specifically for the 2009+ "R" and "X" Fuel Injected models. The older carbureted YFZ450 (2004-2013) uses part number 5TG-81890-00-00, which has different mounting dimensions.
Does it come with the O-ring seal?
Yes, our starters include the necessary pre-installed O-ring for a leak-free installation into the engine case.
Note: Please verify your original part number starts with "18P" to ensure correct compatibility. For technical support, please contact us via the marketplace messaging system.
