BMW 46712301809 Cylinder Bars R50-R100 R/h

( Manufacturer Part Number: 46712301809 ), ( Part Type: Cylinder Bar ), ( Finish: Chrome ), ( Country Of Origin: Germany ), ( Placement On Vehicle: Right )

Review BMW Oem Motorcycle R/h Chrome Cylinder Protection Crash Bars fits 1970-95

The **BMW 46712301809** is a high-performance, precision-engineered cylinder bar assembly designed exclusively for the iconic **BMW R50, R60, R70, R80, R100, and their classic GS variants** produced between **1970 and 1995**. This critical component plays a pivotal role in maintaining the structural integrity and performance of the engine s cylinder head, particularly in the **R50/R60 (M107/M108) and R70/R80/R100 (M109) air-cooled inline-six configurations**. Crafted from **high-grade, heat-treated steel**, the cylinder bar is engineered to withstand the intense thermal and mechanical stresses inherent in BMW s legendary air-cooled engines, ensuring durability under high RPM, aggressive driving conditions, and prolonged use. Its robust construction minimizes warping and distortion, which is especially critical in older models prone to overheating or improper maintenance, thereby extending the lifespan of the cylinder head and preventing costly internal damage. The **OEM-spec dimensions and tolerances** of this part guarantee a seamless fit with the original engine components, including the cylinder head, rocker arms, and valve springs, while also accommodating aftermarket modifications such as performance camshafts or upgraded valve springs. Whether restoring a vintage BMW to its former glory or maintaining a daily-driven classic, this cylinder bar is an indispensable upgrade for enthusiasts seeking to preserve the reliability and performance of their air-cooled six-cylinder powerplant. Its compatibility with both **stock and modified engines** makes it a versatile choice for mechanics and DIYers alike, ensuring optimal engine function and reducing the risk of catastrophic failure due to cylinder head warping a common issue in high-mileage or heavily modified BMWs.

### **Pros and Cons of Buying BMW R50/R100 (1970 1995) with Ending Cylinder Bars**

#### **Pros**

1. **Classic Design and Prestige**

The BMW R50/R100 is an iconic motorcycle, embodying the golden era of motorcycle engineering. Its timeless design, aggressive styling, and strong brand reputation make it a desirable collector s item and a statement piece.

2. **Strong Engine and Performance**

The air-cooled, twin-cylinder boxer engine (R50) or parallel-twin (R100) is renowned for its smooth power delivery, durability, and classic sound. With proper maintenance, these engines can produce reliable performance, especially when upgraded with modern components.

3. **Mechanical Simplicity and Repairability**

Compared to modern motorcycles, these bikes are relatively simple mechanically. Many parts are still available, and skilled mechanics familiar with classic BMWs can perform repairs efficiently. This makes ownership more affordable in the long run if you re mechanically inclined or have access to a good workshop.

4. **Strong Aftermarket Support**

There is a thriving aftermarket for BMW R50/R100 parts, including performance upgrades (e.g., exhausts, carburetor kits, electronic fuel injection conversions), restoration parts, and customization options. This allows owners to tailor their bikes to their preferences.

5. **Potential for Appreciation**

Well-maintained examples, especially rare or original models, can appreciate in value over time, particularly if they are part of a completed restoration or come with a clean history.

6. **Riding Experience and Handling**

The R50/R100 offers a classic, upright riding position with a stable, predictable handling characteristic of BMW s boxer engines. The suspension and braking systems, while basic by modern standards, are adequate for cruising and light touring.

7. **Community and Events**

Owning a classic BMW connects you to a passionate community of enthusiasts. There are numerous rallies, shows, and clubs (e.g., BMW Motorrad Club) where you can ride, socialize, and share knowledge with like-minded riders.

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#### **Cons**

1. **High Maintenance and Wear**

The ending cylinder bars (ECBs) indicate significant wear, which can lead to oil leaks, reduced compression, and potential engine damage if not addressed promptly. This is a critical issue that requires immediate attention to prevent catastrophic failure.

2. **Age-Related Reliability Concerns**

Many R50/R100 models from this era have aged components such as worn-out bearings, seals, and suspension parts. The engine, while robust, may require rebuilds or major overhauls if not properly maintained, which can be costly.

3. **Fuel and Emissions Compliance**

Modern fuel standards (higher octane, lower lead content) can affect carbureted engines, potentially requiring modifications or upgrades to carburetors or fuel systems. Additionally, some regions have restrictions on older, unmodified motorcycles, making registration or insurance more difficult.

4. **Parts Availability and Cost**

While parts are available, some original components (e.g., specific carburetors, seals, or electrical parts) can be expensive or difficult to source. Replacement parts may require sourcing from specialty suppliers or eBay, adding to ownership costs.

5. **Modern Safety and Comfort Limitations**

The R50/R100 lacks modern safety features such as ABS, traction control, or advanced braking systems. The ergonomics and comfort are not optimized for long-distance riding, and the suspension is stiff by today s standards, leading to fatigue on extended rides.

6. **Insurance and Registration Challenges**

Insuring a classic motorcycle can be expensive, especially if it s not fully restored or lacks modern safety features. Some regions may also require additional paperwork or inspections to register the bike legally.

7. **Resale Value Depends on Condition**

Unless the bike is in pristine condition or fully restored, resale value may not justify the purchase price. Many buyers seek completed restorations, which can be costly to achieve.

8. **Environmental and Noise Regulations**

The loud exhaust note and lack of modern noise suppression may violate local noise ordinances, requiring mufflers or modifications to comply with regulations.

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### **Ending Conclusion**

Buying a BMW R50/R100 with ending cylinder bars is a project that can be incredibly rewarding if you re prepared for the challenges. The bike s classic appeal, strong engine, and mechanical simplicity make it a fantastic choice for enthusiasts who enjoy working on their motorcycles or have access to skilled mechanics. However, the wear on the ECBs is a critical issue that must be addressed immediately to avoid engine damage. If you re willing to invest time, money, and effort into restoring or maintaining the bike, it can become a prized possession with excellent long-term potential. On the other hand, if you re not prepared for the maintenance demands or lack the mechanical skills, the costs and hassles may outweigh the enjoyment.

---

### **Recommendation**

Purchase the bike with the understanding that the ECBs will need to be replaced or rebuilt as a priority. Consider budgeting for a full engine rebuild or at least a major overhaul to restore reliability. If you enjoy restoration projects and have the time to dedicate to it, this can be a fulfilling and rewarding experience.

Look for a fully restored or well-maintained R50/R100 with a clean service history. Prioritize bikes that have had recent engine work, suspension refreshes, and modern safety upgrades (e.g., ABS, modern brakes). This will ensure a smoother ownership experience with fewer surprises.

Consider purchasing a bike in need of work but with a lower price tag, then gradually restore it over time. However, be cautious of hidden issues (e.g., frame cracks, electrical problems) that could add unexpected costs.

A modern classic motorcycle (e.g., BMW R1200GS or R1200RT) may offer a better balance of reliability, modern features, and ease of ownership while still delivering the BMW experience.

Ultimately, the R50/R100 is a fantastic bike for the right owner someone who appreciates its heritage, isn t afraid of mechanical work, and is willing to invest in its care. If you re ready for the challenge, it can be an incredibly satisfying and enjoyable motorcycle. If not, consider alternatives that offer a more hassle-free ownership experience.

Details:

part #: 46712301809 prices

• $24.99-$165.00

specifications mocycfra:

• for makes: Bmw
• for years: 1970-95
• mpn: 46712301809
• part type: Cylinder Bar
• finish: Chrome
• country of origin: Germany
• placement on vehicle: Right

returns mocycfra:

• policy: No Returns

payments mocycfra:

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

offer mocycfra:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: April 2, 2026

shipping mocycfra:

• class: Standard, Economy
• type: Calculated
• cost: $19.50
• carrier: USPS, UPS
• transit: 9-15 Days
• service: USPS Ground Advantage, UPS Ground Saver

general mocycfra:

• condition: Used
• Motorcycle Scooter Parts Accessories > Body Frame > Frames Parts

seller mocycfra:

• rating: 100.0%
• city: Hershey, Pennsylvania
• # reviews: 87

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