2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire – Complete Review & Fitment Guide

The 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire is a comprehensive maintenance and replacement component set designed specifically for YZ125 riders. Whether you’re restoring a classic bike or ensuring reliable performance for trail riding or racing, this OEM assembly delivers the quality, fitment precision, and durability Yamaha riders expect.

In this detailed review, we’ll break down the specifications, performance benefits, compatibility, and comparisons with similar aftermarket options to help you decide if this is the best choice for your Yamaha YZ125.

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Product Overview – What Is the 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire?

The 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire package includes key components that are critical to the electrical and wheel assembly system on a Yamaha YZ125 dirt bike. With Yamaha OEM parts, you get precise engineering and quality control straight from the factory, ensuring long‑lasting performance.

This assembly is designed to fit Yamaha YZ125 models from 2005 through 2021, covering multiple model years and giving riders a reliable choice when servicing or upgrading their bikes.

Core Components & Specifications

OEM Stator & Magneto Rotor Assembly

At the heart of this product is the stator and magneto rotor set, which provides electrical generation for ignition and charging functions. The stator delivers stable current to power the bike’s electrical systems, while the magneto rotor spins with the crank to generate magnetic fields required for power production.

Precision manufactured to Yamaha OEM tolerances
Durable windings and magnets for consistent output
Direct replacement for worn or damaged units

Flywheel

The flywheel included in the 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire helps stabilize engine rotational speed, reducing vibration and ensuring smoother throttle response. Its balance and weight distribution were designed by Yamaha engineers for optimal performance.

Rear Wheel Rim & Hub

The rear wheel rim and hub assembly are engineered to match Yamaha’s original specifications. This means correct spacing for brake rotors, sprocket alignment, and reliable wheel integrity for off‑road use.

True round wheel balance
Compatible with standard YZ125 axle spacings
Designed for knobby off‑road tire mounting

Tire Compatibility

This assembly works with most standard 80/100‑19 rear tires used on Yamaha YZ125 motorcycles. The OEM rim ensures correct bead seating and ensures safe riding on trails, tracks, or motocross circuits.

Performance Benefits

Exact OEM Fitment

Since this is a genuine Yamaha part, the 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire installs with no modification necessary. This minimizes time in the shop and lowers installation complexity compared to some aftermarket assemblies.

Durability for Off‑Road Use

Yamaha OEM parts are engineered to withstand rigors of motocross and trail riding. The stator and magneto rotor are built to resist heat and vibration, while the rear wheel components endure impacts and rough terrain stresses.

Maintenance & Reliability

Replacing worn electrical components and wheel hubs with the 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire can prevent common mechanical failures, improve starting consistency, and eliminate wheel wobble or tire instability.

Installation & Fitment Notes

Installation of the 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire should follow Yamaha’s factory service manual instructions. Professional installation ensures correct flywheel torque, stator alignment under the crankcase, and rear wheel spacing for brake and drive components.

This assembly is compatible with:

Yamaha YZ125 models 2005–2021
Standard YZ125 electrical and wheel systems
OEM brake rotor and sprocket configurations

Comparing with Related Products

Aftermarket Stator & Flywheel Assemblies

Aftermarket stator and flywheel kits are often cheaper but may sacrifice reliability or longevity. Unlike the 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire, some aftermarket versions use lower‑grade magnets or windings that degrade faster under high heat.

OEM vs. Aftermarket Rims

OEM rims, like the one included with this Yamaha set, are engineered for perfect wheel trueness and durability. Aftermarket rims might offer lightweight options, but they can vary in bead seating precision, which affects tire performance and safety.

Complete Wheel Kits

Some brands sell complete rear wheel kits with bearings and seals included. While convenient, they may still require mixing and matching parts. The 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire remains a solid base OEM option that you can build upon with bearings and seals of your choice.

Pros & Cons – Balanced Insight

Pros

Direct Yamaha OEM specification fit
Reliable electrical performance from the stator and magneto rotor
Durable rear wheel rim and hub designed for off‑road abuse
Broad model year compatibility (2005–2021)

Cons

Requires professional installation for best results
May not include bearings or seals (sold separately)

Final Thoughts

For riders maintaining or restoring a Yamaha YZ125, the 2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3‑85550‑01‑00 Rear Wheel Rim Hub Tire offers trustworthy OEM quality across core electrical and wheel systems. Its precise fit and durable construction make it a highly recommended choice for both casual trail riders and competitive motocross enthusiasts.

2005 – 2021 Yamaha YZ 125 OEM Stator Magneto Rotor Flywheel 1C3-85550-01-00