fits model: K1100. make: Bmw.

( Part Type: Driveshaft ), ( Machine Type: Street Motorcycle ), ( Vintage Part: Yes ), ( Compatible Year: 1993 ), ( UPC: 127456404731 )
The **BMW 127456404731 K1100 Driveshaft (Drive Shaft)** is a precision-engineered, high-performance component designed exclusively for BMW s iconic K1100 series motorcycles, including models like the K1100S, K1100RS, and K1100GT. This driveshaft represents the pinnacle of BMW s engineering heritage, combining durability, reliability, and dynamic responsiveness to deliver an exhilarating riding experience. Crafted from high-grade, heat-treated steel, this driveshaft is built to withstand the rigorous demands of both daily commuting and high-speed spirited riding, ensuring seamless power transfer from the transmission to the rear wheel without compromising on performance or longevity. Its robust construction features a **splined shaft** with a **precision-machined universal joint (U-joint)** at both ends, allowing for smooth articulation and minimal flex even under heavy loads or aggressive cornering. The driveshaft is meticulously balanced to eliminate vibrations, enhancing rider comfort and reducing fatigue during extended rides. Additionally, it is designed to accommodate BMW s **K1100 s 6-speed transmission**, providing optimal torque transfer and maintaining synchronization with the motorcycle s precise gearing. Whether navigating tight urban streets or cruising along winding highways, this driveshaft ensures a direct, responsive connection between the engine and rear wheel, amplifying the K1100 s legendary agility and power delivery. For enthusiasts seeking to restore or upgrade their K1100, this OEM-quality driveshaft is an essential component that upholds the motorcycle s original performance standards while offering the reliability expected from BMW s engineering legacy.
The BMW K1100 driveshaft (also referred to as a driveshaft or rear drive shaft) is a critical component for the rear-wheel-drive system in BMW motorcycles, particularly models like the K1100RS, K1100GT, or K1100S. Below are the key pros and cons of purchasing one, followed by a conclusion and recommendation.
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### **Pros of Buying a BMW K1100 Driveshaft**
1. **Improved Performance and Reliability**
A high-quality driveshaft can enhance power transfer from the engine to the rear wheel, reducing slippage and improving acceleration. Aftermarket or upgraded driveshafts are often designed with better materials (e.g., forged steel, heat-treated alloys) or balanced weights to reduce vibration and wear, which can extend the lifespan of the transmission and rear sprocket.
2. **Reduced Vibration and Smoothness**
Stock driveshafts on BMW motorcycles, especially older models, can develop imbalances over time due to wear or improper installation. A new or upgraded driveshaft is often better balanced, leading to a smoother ride and less fatigue for the rider during long rides.
3. **Compatibility with Modifications**
If you ve modified your bike with a different sprocket ratio, exhaust system, or engine tuning, a driveshaft that matches the new power output can prevent premature failure. For example, a higher-performance driveshaft may be necessary if you ve increased torque significantly.
4. **Prevents Costly Damage**
A failing driveshaft can cause catastrophic failure, leading to damage to the transmission, rear sprocket, or even the engine. Replacing a driveshaft before it fails is far cheaper than repairing the consequences of a broken one mid-ride.
5. **Customization and Aesthetics**
Some aftermarket driveshafts come with unique designs or finishes (e.g., polished, anodized, or custom-length options). While this is more of a cosmetic upgrade, it can personalize your bike s appearance.
6. **Easier Installation and Maintenance**
Modern or aftermarket driveshafts often come with clearer installation instructions and may include gaskets, bolts, or mounting hardware, simplifying the replacement process compared to sourcing parts separately.
7. **Potential Weight Reduction**
Some aftermarket driveshafts are lighter than stock units, which can improve handling and agility, especially in sportier models like the K1100RS.
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### **Cons of Buying a BMW K1100 Driveshaft**
1. **Cost**
High-quality driveshafts, especially aftermarket or OEM replacements, can be expensive. Prices vary widely depending on the brand, material, and whether it s a direct replacement or a custom-built unit. For example, a stock BMW driveshaft might cost $200 $400, while a premium aftermarket or forged option could exceed $600 $1,000.
2. **Installation Complexity**
Replacing a driveshaft requires removing the rear wheel, transmission cover, and sometimes the swingarm. While not overly difficult, it can be time-consuming (4 8 hours for a first-time installer) and may require specialized tools or knowledge of motorcycle mechanics. Improper installation can lead to misalignment or premature wear.
3. **Compatibility Issues**
Not all driveshafts are universally compatible with every K1100 model variant. For instance, a driveshaft designed for the K1100RS might not fit perfectly on a K1100GT due to differences in swingarm or transmission spacing. Always verify compatibility before purchasing.
4. **Potential for Counterfeit or Low-Quality Parts**
The aftermarket for BMW motorcycle parts can be flooded with counterfeit or poorly made replicas. Cheap driveshafts may fail quickly, leading to safety risks or further expenses. Buying from reputable dealers or manufacturers (e.g., BMW Motorrad, BMW Performance Parts, or trusted aftermarket brands like **BMW Motorrad Performance Parts, Dynacraft, or Race Tech**) is crucial.
5. **Limited Longevity Gains (If Stock is Already Good)**
If your stock driveshaft is relatively new and well-maintained, upgrading may not offer significant benefits beyond aesthetics or minor performance tweaks. In such cases, the cost may not justify the upgrade.
6. **Warranty or Return Risks**
Some aftermarket parts may not come with warranties, and returns can be difficult if the driveshaft doesn t fit or performs poorly. Always check the seller s return policy before purchasing.
7. **Maintenance Requirements**
Even a new driveshaft may require periodic checks for wear, balance, or bolt torque. Neglecting maintenance can lead to premature failure, negating the initial investment.
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### **Conclusion**
Buying a BMW K1100 driveshaft is a worthwhile investment if you re experiencing vibration, slippage, or suspect wear in your current driveshaft. Upgrading can improve performance, reliability, and ride quality, especially if you ve modified your bike or plan to ride aggressively. However, the decision should be based on your specific needs, budget, and the condition of your existing driveshaft.
If your driveshaft is old, worn, or causing issues, replacing it is a practical choice. If your driveshaft is new and functioning well, the upgrade may not be necessary unless you re pursuing performance gains or customization. Always prioritize quality over cost to avoid safety risks or repeated failures.
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### **Recommendation**
1. **Assess Your Needs:**- If you re experiencing vibration, slipping, or unusual noises, replace the driveshaft immediately.
- If you ve modified your bike (e.g., increased torque, changed sprockets), consider an upgraded driveshaft to match the new power output.
2. **Choose the Right Driveshaft:**- For stock-like reliability, opt for an **OEM BMW Motorrad driveshaft** or a high-quality aftermarket option from brands like **BMW Performance Parts, Dynacraft, or Race Tech**.
- If you re chasing performance, look for **forged steel or heat-treated driveshafts** designed for high torque.
- Avoid no-name or extremely cheap driveshafts unless they come from a trusted source.
3. **Budget Accordingly:**- Allocate at least **$300 $500** for a reliable driveshaft. If you re on a tight budget, prioritize a quality OEM replacement over a premium aftermarket part.
4. **Professional Installation:**- If you lack experience, have a **BMW dealership or trusted mechanic** install the driveshaft to ensure proper alignment and torque specifications.
5. **Maintain Regularly:**- Check driveshaft bolts and balance periodically, especially after long rides or modifications.
**Final Verdict:**For most riders experiencing issues or planning modifications, upgrading the driveshaft is a smart move. However, if your driveshaft is in good condition and you re not pushing the bike hard, the upgrade may not be urgent. Always balance performance needs with practicality and budget.
90s K1100 rs/Lt driveshaft used in good condition.