YAMAHA 1WS-15590-00-00 Sprag Starter Clutch P/n

( Manufacturer Part Number: 1WS-15590-00-00 ), ( Part Type: Starter Clutch ), ( Compatible Model: Yzf-r7, Mt-07 ), ( Material: Steel ), ( Compatible Year: 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015 ), ( Country Of Origin: Japan ), ( Placement On Vehicle: Left )

Review YAMAHA To Oem Sprag Starter Clutch One way P/n fits YZF-R7 2015–2025

The **Yamaha 1WS-15590-00-00 Sprag Starter Clutch (One-Way)** is a precision-engineered component designed exclusively for the **2015 2025 Yamaha YZF-R7**, serving as a critical element in the motorcycle s automatic starter clutch system. This high-performance clutch leverages Yamaha s advanced **sprag-type one-way mechanism**, ensuring smooth and reliable engagement during cranking while preventing reverse rotation, which is essential for protecting the starter motor and transmission components. Crafted from durable materials, including hardened steel sprags and a robust housing, this clutch is built to withstand the demanding stresses of repeated starts, even in extreme conditions, making it a long-lasting solution for riders who demand reliability without compromise. The design incorporates Yamaha s proprietary engineering to minimize wear and friction, reducing the risk of premature failure and ensuring consistent performance over thousands of starts. Whether used in maintenance, replacement, or as an upgrade, this clutch maintains the integrity of the YZF-R7 s starting system, delivering the seamless operation expected from Yamaha s legendary precision. Its compatibility with the R7 s specific starter assembly ensures a perfect fit, allowing for easy installation by experienced mechanics or dedicated riders with basic tooling. For those seeking a direct, OEM-quality replacement that upholds the motorcycle s performance and longevity, the **1WS-15590-00-00 Sprag Starter Clutch** stands as an indispensable part, embodying Yamaha s commitment to innovation and durability in motorcycle components.

### **Pros and Cons of buying a Yamaha YZF-R7 Sprag Starter Clutch One-Way (P/N 1WS-15590-00-00, 2015 2025 Models)**

1. **Compatibility** This part is designed specifically for the Yamaha YZF-R7 (2015 2025 models), ensuring a perfect fit without modification. It replaces the original starter clutch assembly, which can wear out over time, especially in high-mileage or aggressive riding conditions.

2. **Reliability** Yamaha s sprag starter clutch is known for durability, particularly in bikes with kickstart or electric start systems. It reduces wear on the starter motor by allowing the engine to turn the starter pinion without spinning the starter itself, extending its lifespan.

3. **Prevents Starter Damage** A failing starter clutch can cause the starter motor to overheat or fail entirely if the engine binds or the clutch seizes. Replacing it proactively avoids costly starter replacements.

4. **Easy Installation** The part is relatively straightforward to install, especially for those with basic mechanical experience. It typically requires removing the starter motor and replacing the clutch assembly, which is a manageable DIY job for many riders.

5. **Cost-Effective** Compared to replacing a starter motor (which can cost $200 $400 including labor), a new starter clutch is significantly cheaper (typically $50 $100). It s a low-risk upgrade that can prevent more expensive failures.

6. **Improved Kickstart Performance** If your bike has a kickstart, a worn clutch can make starting sluggish or impossible. A fresh sprag clutch ensures smoother engagement, especially in cold weather or when the engine is cold.

7. **Prevents "Spinning" Starter** A bad clutch can cause the starter to spin excessively when the engine is running, leading to premature wear. Replacing it eliminates this issue.

8. **Warranty Coverage** If purchased from an authorized Yamaha dealer or a reputable aftermarket supplier, the part may come with a warranty, providing peace of mind against early failure.

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1. **Wear and Tear Over Time** Like any mechanical component, the sprag clutch will eventually wear out, especially in high-mileage bikes or those ridden aggressively. It s not a permanent fix but rather an extension of the starter s lifespan.

2. **Potential for Misalignment** If not installed correctly, the clutch could bind or fail to engage properly. This requires careful attention during installation to ensure the sprags align with the starter pinion.

3. **Limited Lifespan Extension** While the clutch improves starter longevity, it doesn t eliminate the need for eventual starter motor replacement. The clutch itself may need replacement every 50,000 100,000 miles, depending on riding conditions.

4. **DIY Difficulty for Beginners** While manageable, removing the starter motor and replacing the clutch requires some mechanical skill. Those without experience may struggle with tools, torque specifications, or reassembly.

5. **Cost of Replacement Over Time** If the clutch fails repeatedly (due to poor quality or installation issues), the cumulative cost may outweigh the benefits. Opting for a high-quality aftermarket part can mitigate this risk.

6. **No Performance Gain** Unlike some aftermarket upgrades, this part does not improve acceleration, throttle response, or power. It s purely a maintenance or failure-prevention component.

7. **Availability of Counterfeit Parts** Purchasing from untrusted sellers may result in low-quality or fake parts that fail prematurely. Always buy from authorized dealers or well-reviewed suppliers.

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The **Yamaha YZF-R7 sprag starter clutch (P/N 1WS-15590-00-00)** is a **highly recommended upgrade or replacement part** for riders looking to extend the life of their starter motor, improve kickstart reliability, and prevent costly failures. Its **low cost, ease of installation, and direct compatibility** make it a smart preventive measure, especially for bikes approaching higher mileage.

However, it s not a **permanent solution** it will eventually wear out and may need replacement again. If you re experiencing **starter-related issues (e.g., clicking, grinding, or failure to engage)**, replacing the clutch is a **practical and cost-effective fix** before the starter motor itself fails.

For **best results**, use **OEM or high-quality aftermarket parts** (e.g., from **Yamaha, Motorex, or SKF**) and follow installation guidelines carefully. If unsure about DIY work, consult a mechanic to ensure proper fitting.

- **Buy it if:** You re experiencing starter clutch symptoms (e.g., starter spinning when engine is running, difficulty kickstarting, or a worn-out original clutch).

- **Replace it proactively if:** Your bike has **50,000 miles** or you ride aggressively (track use, frequent cold starts).

- **Avoid cheap knockoffs** to prevent premature failure.

- **Consider a starter motor replacement** if the clutch fails repeatedly or if the starter itself is already worn.

**Verdict:** **Worth the investment** for long-term reliability and cost savings.

Details:

As removed from fully functional motorcycle. All parts have been cleaned and sealed in plastic bags. Too many times they don't acknowledge deliveries. Everything that you see in the photos are included sale.

Nothing more and nothing less.

part #: 1ws155900000 prices

• $129.50-$149.99

specifications cyclevintagee:

• for models: Yzf-r7
• for makes: Yamaha
• for years: 2015-2025
• mpn: 1ws-15590-00-00
• part type: Starter Clutch
• compatible model: Yzf-r7, Mt-07
• material: Steel
• compatible year: 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015
• country of origin: Japan
• placement on vehicle: Left

shipping cyclevintagee:

• type: Calculated
• transit: 3-6 Days
• cost: $18.95
• service: USPS Ground Advantage, FedEx Ground / FedEx Home Delivery, USPS Priority Mail Padded Flat Rate Envelope
• class: Standard, Expedited
• carrier: USPS, FedEx

payments cyclevintagee:

• other
• wallet: Apple-pay
• credit card: Diners-club

seller cyclevintagee:

• city: Largo, Florida
• rating: 99.6%
• # reviews: 978

returns cyclevintagee:

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

offer cyclevintagee:

• started: June 5, 2026
• quantity: 1
• sold: 0
• options: Ship-to-home
• availability: In Stock

general cyclevintagee:

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

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