fits model: R1, Yzf. make: Yamaha. year: 2004–2008.

( Manufacturer Part Number: 4C8-22141-00-00 ), ( Type: Bolt ), ( Country Of Origin: Japan )
The **Yamaha 4C8-22141-00-00** is a precision-engineered rear swing arm pivot bolt shaft for the **2004 2008 Yamaha YZF-R1**, a high-performance sportbike renowned for its aggressive styling, cutting-edge technology, and relentless speed. This critical component plays a pivotal role in the bike s suspension and handling dynamics, ensuring smooth articulation of the rear swing arm while withstanding the immense forces generated during high-speed cornering, aggressive braking, and rapid acceleration. Crafted from high-grade **4140 chromoly steel**, the pivot bolt shaft is heat-treated and machined to exacting tolerances, delivering exceptional durability and resistance to fatigue even under the most demanding riding conditions. Its **straight design** eliminates unnecessary bends, optimizing alignment and reducing stress concentrations, which is particularly beneficial for riders pushing the limits of their R1 s capabilities. The bolt features a **smooth, polished finish** to prevent galling and corrosion, while its precise fitment ensures seamless integration with the swing arm s pivot points, maintaining optimal suspension geometry. Whether you re chasing lap times on the track or navigating twisty backroads with precision, this genuine Yamaha part guarantees reliability and performance, keeping your R1 s rear suspension functioning at its best for years to come. Ideal for restorations, upgrades, or routine maintenance, it s a must-have replacement for any owner seeking to preserve the integrity of their machine s handling and longevity.
### **Pros and Cons of Buying a Used Yamaha YZF-R1 Rear Swing Arm Pivot Bolt Shaft (Part Number: 4C8-22141-00-00, Fits 2004 2008 Models)**
#### **Pros:**1. **Authentic OEM Fitment** This is a genuine Yamaha part, ensuring a perfect fit with no modifications required. It will integrate seamlessly with the stock suspension and swing arm setup.
2. **Reliability** Yamaha s components are known for durability, especially in high-performance motorcycles like the R1. The pivot bolt shaft is a critical linkage point, and a quality part reduces the risk of premature wear or failure.
3. **Performance Integrity** Unlike aftermarket or cheap knockoffs, this part maintains the intended geometry and function of the R1 s rear suspension. Proper alignment is crucial for handling, braking, and tire wear.
4. **Ease of Installation** Since it s a direct replacement, swapping it in requires minimal effort compared to custom or modified parts. Most mechanics or experienced riders can install it in under an hour.
5. **Long-Term Cost Savings** While the upfront cost may be higher than a generic part, using an OEM component reduces the likelihood of recurring issues (e.g., misalignment, premature bearing wear) that could lead to bigger repairs later.
6. **Resale Value** If you plan to sell the bike later, having original or high-quality parts can make it more appealing to buyers who prioritize authenticity and reliability.
7. **Compatibility with Stock Mods** If you re running stock suspension (e.g., hlins or Showa) or plan to keep it stock, this part ensures everything works as intended without interference.
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#### **Cons:**1. **Higher Upfront Cost** Compared to aftermarket or generic parts, this OEM component will be more expensive. Prices can range from **$150 $300**, depending on condition and seller.
2. **Potential for Counterfeit Parts** Buying from untrusted sellers (e.g., eBay, Facebook Marketplace, or unknown shops) risks receiving a fake or low-quality replica. Always verify the seller s reputation and part authenticity.
3. **Limited Availability** As the R1 ages, finding OEM parts can be challenging, especially for older models (pre-2008). You may need to check multiple sources or wait for restocks.
4. **No Performance Upgrades** Unlike aftermarket pivot shafts (e.g., from brands like **Renthal, Dida, or custom CNC-machined parts**), this part won t offer stiffness, weight savings, or other performance tweaks. If you re chasing handling improvements, you ll need to look elsewhere.
5. **Wear and Condition** If purchasing used, the part may show signs of wear (e.g., rust, bent shaft, or worn bearings). Inspect it thoroughly or get it professionally checked before installation.
6. **No Warranty (Used Purchase)** Buying used means no manufacturer warranty. If the part fails shortly after installation, you ll bear the cost of replacement.
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### **Conclusion:**The **Yamaha 4C8-22141-00-00 pivot bolt shaft** is a **strong choice** if you prioritize **authenticity, reliability, and ease of installation** for your 2004 2008 YZF-R1. It s ideal for riders who:
- Want to **maintain stock suspension integrity** without compromising handling.
- Prefer **OEM quality** over aftermarket alternatives.
- Are **not actively pursuing aggressive performance mods** (e.g., full suspension rebuilds or aggressive handling tweaks).
- Can afford the **higher cost** and want to avoid potential issues from cheaper parts.
However, if you re **budget-conscious, chasing performance gains, or open to non-OEM parts**, you may explore alternatives like:- **Aftermarket pivot shafts** (e.g., **Renthal, Dida, or custom machined** for stiffer linkage).
- **Used but inspected parts** (check for rust, straightness, and bearing condition).
- **Remanufactured OEM parts** (some sellers offer rebuilt versions at a lower cost).
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### **Recommendation:**1. **Buy New (If Available)** If you can find this part **new or reconditioned** from a trusted Yamaha dealer or reputable online retailer (e.g., **Motorcycle Parts Pro, Cycle World, or eBay with verified sellers**), it s the safest bet.
2. **Inspect Thoroughly If Used** If purchasing used, **check for:**- **Straightness** (use a straightedge or hang it to see if it bends).
- **Bearing condition** (spin the shaft it should be smooth, not rough or noisy).
- **Rust or corrosion** (clean and inspect for pitting).
- **Matching bolt holes** (ensure it aligns perfectly with your swing arm).
3. **Consider Aftermarket for Performance** If you re modifying the suspension (e.g., adding stiffer links for track use), a **high-quality aftermarket shaft** (e.g., **Renthal s R1-specific parts**) may justify the extra cost.
4. **Budget Alternative** If cost is a concern, look for **used but well-maintained parts** from trusted sellers (e.g., local bike shops, forums like **Yamaha-R1.com, or Cycle Trader**). Set a **maximum budget of $100 $150** for used parts to balance cost and risk.
5. **Install Properly** Even with a good part, **misalignment or improper installation** can cause handling issues. If unsure, have a mechanic check the **suspension geometry** after replacement.
**Final Verdict:**For **stock or near-stock R1 owners**, this **OEM pivot bolt shaft is a solid, low-risk upgrade**. For **performance-focused riders**, weigh the cost against aftermarket options that offer stiffness or weight savings. Always **prioritize quality over price** to avoid long-term problems.
Parts are in good Used Condition with No Damage except Normal Wear, unless stated otherwise. Aftermarket items should not be expected to have perfect fitment, as OEM will likely exactly match the paint of. Compatible Vehicles Sub model: Year: Make: model: 2008 Yamaha YZF R1, 2007 Yamaha YZF Silver 2007 Yamaha YZF 2006 Yamaha YZF 50th Anniversary 2006 Yamaha YZF Limited Edition 2006 Yamaha YZF 2005 Yamaha YZF T/C Raven 2005 Yamaha YZF 2004 Yamaha YZF R1. 30 DAY WARRANTY ON ALL PARTS.
This part is off a 2007 YAMAHA YZF R1. Though most of the motorcycles are not damaged, it should be expected that all parts will wear and tear from everyday use.