YAMAHA 90179-20255-00 Sprocket Nut Washer 193

( Part Type: Sprocket Washer ), ( UPC: 901792025500 )

Review YAMAHA Stroke Sprocket Nut Washer Oem 193 fits YZ250 1926–2002

The **Yamaha 90179-20255-00 YZ250 sprocket nut washer (part number 193)** is a precision-engineered component designed specifically for Yamaha YZ250 models manufactured between the 2002 and 2006 model years. This high-quality washer plays a critical role in maintaining proper alignment and torque distribution within the rear sprocket assembly, ensuring optimal chain tension and drivetrain performance. Crafted from durable, heat-treated steel, this washer features a smooth, flat surface with a slightly raised center, allowing it to evenly distribute the clamping force exerted by the sprocket nut, preventing premature wear on both the sprocket and the chain. Its precise fitment is essential for preventing lateral movement of the sprocket, which could lead to misalignment, excessive chain wear, or even catastrophic failure under high-stress conditions. Whether you're performing routine maintenance, upgrading your drivetrain, or addressing a worn-out component, this washer serves as an indispensable part of the YZ250 s rear end assembly, contributing to the reliability and longevity of your motorcycle s drivetrain. Its straightforward yet vital function underscores its importance in maintaining the integrity of the entire power delivery system, making it a must-have replacement for any serious rider looking to keep their YZ250 running at peak performance.

**Pros and Cons of buying a Yamaha YZ250 02-26 Sprocket Nut Washer (Part #193)**

1. **Direct Fitment** This part is specifically designed for Yamaha YZ250 models produced between 2002 and 2006, ensuring compatibility without modification.

2. **High-Quality Material** Yamaha parts are generally made from durable materials, reducing the risk of premature wear or failure.

3. **Easy Installation** As a simple nut washer, it requires minimal tools (typically a socket wrench) and basic mechanical skill to install, making it a straightforward DIY project.

4. **Prevents Rust and Wear** A proper washer helps distribute load and prevent the sprocket nut from seizing or corroding over time, extending the lifespan of the chain and sprocket assembly.

5. **Cost-Effective** Compared to labor costs at a dealership, purchasing and installing this part yourself saves money.

6. **Prevents Chain Slippage** A worn or missing washer can cause the chain to shift, leading to poor performance or damage replacing it ensures proper tension and alignment.

7. **OEM Replacement** Using an original Yamaha part maintains the bike s integrity and resale value, as aftermarket alternatives may not fit as precisely.

1. **Limited Availability** Since this is an older part, it may not be as widely stocked as newer components, requiring special ordering from Yamaha dealers or online marketplaces.

2. **Potential Counterfeit Risk** Purchasing from unauthorized sellers (e.g., third-party online stores) could result in fake or low-quality replicas that fail prematurely.

3. **Minor Skill Requirement** While simple, removing the old washer may require loosening the sprocket nut, which could be tricky if the bike hasn t been serviced in a while (rust or seized components may be an issue).

4. **No Performance Gain** This is a maintenance part, not an upgrade; it won t improve speed, handling, or power only reliability.

5. **Warranty Void Risk** If the bike is still under warranty, improper installation (e.g., overtightening) could void coverage, though replacing a washer is typically a low-risk procedure.

The Yamaha YZ250 sprocket nut washer (part #193) is a **practical, low-cost, and necessary maintenance item** for keeping your bike s drivetrain in good condition. Its direct fitment and durability make it a reliable choice, though availability and potential counterfeit concerns should be considered when purchasing. For most riders, the benefits of using an OEM part outweigh the minor drawbacks, especially if the bike is well-maintained or being prepared for sale.

- **Buy from an authorized Yamaha dealer or a trusted online retailer** (e.g., Yamaha s official website, reputable motorcycle parts suppliers) to ensure authenticity.

- **Check for rust or damage** on the sprocket nut and chain before installation clean and lubricate the area to prevent future issues.

- **Follow proper torque specifications** when reinstalling the nut to avoid overtightening, which could strip threads.

- **Consider bundling with other drivetrain maintenance** (e.g., chain replacement, sprocket inspection) if the bike is due for a full service.

For most riders, this part is a **worthwhile investment** in preventing drivetrain failures and ensuring smooth operation. If budget is a concern, verify the part s authenticity before purchasing to avoid counterfeit risks.

Details:

Good Condition. GSR veers 1730 GS 9.9.4 1730 GSR 1730. Yamaha YZ250 2 Stroke 02-26 Sprocket Nut Washer OEM 90179-20255-00 193. Typical shipping time.

part #: 901792025500 prices

• $8.84-$12.49

specifications transmissioncycleoi:

• for models: Yz250
• for makes: Yamaha
• for years: 1926-2002
• part type: Sprocket Washer
• upc: 901792025500

general transmissioncycleoi:

• Motorcycle Scooter Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain Parts
• condition: Used

shipping transmissioncycleoi:

• class: Expedited
• transit: 4-10 Days
• cost: $0.00
• type: Fixed
• service: Expedited

payments transmissioncycleoi:

• wallet: Google-pay
• credit card: Visa
• other

returns transmissioncycleoi:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days

seller transmissioncycleoi:

• # reviews: 5038
• rating: 99.7%
• city: USA

offer transmissioncycleoi:

• started: February 7, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0
• availability: In Stock

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