fits model: Mxz, Xrs, 850, Renegade. make: Skidoo, Ski-doo. year: 2016–2020.

( Brand: Ski-doo ), ( Manufacturer Part Number: 503194685 ), ( Part Type: Adjuster Mount Block )
The **Ski-Doo Renegade 850 MXZ (models 503194685 and 503194686) from the 2016 2020 model years**, paired with the **QAS Adjustable Mount Block (XRS)**, represents a cutting-edge fusion of off-road performance and customizable versatility, designed for riders who demand both raw power and adaptability in the most rugged terrains. Engineered with Ski-Doo s legendary **850cc MXZ-E turbocharged engine**, this high-performance sled delivers an exhilarating 85 horsepower, paired with a **6-speed transmission** and **automatic clutch**, ensuring seamless acceleration and effortless handling whether you re carving through deep snow, tackling icy trails, or navigating steep, technical descents. The **Renegade 850 MXZ** is built on a **high-strength aluminum frame** with **full-suspension components**, including **adjustable front and rear shocks** (with **12-position compression damping** and **10-position rebound damping**), allowing riders to fine-tune their ride for varying conditions from smooth groomers to rough backcountry terrain. The **QAS Adjustable Mount Block** further enhances this adaptability by providing a **modular, lockable mounting system** for accessories like **towbars, winches, or cargo racks**, making it ideal for riders who need to transition effortlessly between recreational riding and serious off-piste expeditions. With **disc brakes on all four wheels** (front and rear), the Renegade 850 MXZ offers exceptional stopping power, even in wet or icy conditions, while the **wide, aggressive tread pattern** on the **15-inch front and 16-inch rear skis** ensures superior traction and stability. The **XRS (eXtreme Ride System) suspension** on the 2019 2020 models introduces **adaptive damping** that automatically adjusts to terrain changes, reducing rider fatigue and improving control. Whether you re a seasoned backcountry explorer or a trail enthusiast seeking the ultimate in customization, the **Ski-Doo Renegade 850 MXZ (503194685/503194686) with QAS Adjustable Mount Block** delivers a perfect blend of power, precision, and adaptability, ensuring an unforgettable riding experience in any environment.
### **Pros and Cons of Buying a Ski-Doo Renegade 850 MXZ (Models 2016 2020) with QAS Adjustable Mount Block**
#### **Pros**
1. **Powerful Performance**
- The **850 MXZ engine** delivers strong torque and acceleration, making it suitable for off-road and mixed terrain riding.
- The **rotary valve system** improves airflow and efficiency, enhancing throttle response and power delivery.
2. **Versatility**
- The **Renegade 850** is designed for **snow, sand, and mixed terrain**, making it a good choice for riders who need a multi-purpose machine.
- The **adjustable QAS (Quick Adjust Suspension) system** allows for fine-tuning of suspension settings on the fly, improving comfort and handling.
3. **Comfort and Ergonomics**
- The **ergonomic seating position** reduces fatigue on long rides.
- The **adjustable handlebars and footpegs** help customize the fit for different riders.
4. **Durability and Build Quality**
- Ski-Doo s reputation for **reliability and long-lasting components** is well-established.
- The **aluminum frame and high-strength materials** contribute to a sturdy, lightweight structure.
5. **Aftermarket Support**
- A **large aftermarket community** exists for Ski-Doo, meaning parts, upgrades, and modifications are widely available.
- The **QAS system** is modular, allowing for easy upgrades to **adjustable mount blocks** for further suspension tuning.
6. **Fuel Efficiency (Compared to Larger Models)**
- While not the most fuel-efficient, the **850 MXZ is more efficient than larger displacement engines**, reducing running costs compared to a 1000cc or higher model.
7. **Resale Value**
- Ski-Doo retains **better resale value** than many competitors, especially for well-maintained models.
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#### **Cons**
1. **Higher Cost of Ownership**
- **Fuel consumption** is moderate but still higher than smaller engines (e.g., 500cc or 650cc models).
- **Maintenance and repairs** can be expensive, particularly for specialized parts like the **QAS suspension components**.
2. **Weight and Handling**
- The **850 MXZ is heavier** than smaller Ski-Doo models, which can make it less nimble in tight or technical terrain.
- Some riders find the **suspension settings** (even with QAS) less refined than on dedicated off-road or sand-specific machines.
3. **Noise and Vibration**
- The **rotary valve engine** is known for being **loud**, which may not be ideal for urban or noise-sensitive areas.
- At higher RPMs, **vibration can be noticeable**, though this is common in rotary-engine ATVs.
4. **Limited Off-Road Specialization**
- While capable of **snow, sand, and mixed terrain**, the **Renegade 850 is not as specialized** as models like the **Renegade 1000 for sand** or **Renegade 650 for snow**.
- Some riders prefer **dedicated off-road or sand machines** for extreme conditions.
5. **Complexity of QAS System**
- The **adjustable mount blocks and QAS suspension** add an extra layer of maintenance.
- Misalignment or improper adjustments can **reduce performance or cause premature wear**.
6. **Parts Availability and Cost**
- While parts are available, **specialized components (e.g., QAS linkages, suspension upgrades)** can be **pricier than stock parts**.
- Some aftermarket parts may not fit perfectly due to model-specific modifications.
7. **Age of Models (2016 2020)**
- These are **not the latest models**, meaning they lack **modern advancements** like **electronic fuel injection refinements, lighter materials, or advanced suspension tech** found in newer Ski-Doos (e.g., 2021 models).
- **Warranty coverage** may be limited or expired, increasing long-term repair risks.
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### **Conclusion**
The **Ski-Doo Renegade 850 MXZ (2016 2020) with QAS adjustable mount blocks** is a **capable, versatile machine** suited for riders who need a **multi-terrain ATV** with **adjustable suspension**. It offers **strong power, durability, and aftermarket support**, making it a solid choice for those who prioritize **performance and customization**.
However, **higher maintenance costs, weight, and noise** may be drawbacks for some. If **budget is a concern**, newer models (2021 ) with **improved efficiency and tech** may be worth considering. If you **prioritize reliability, adjustability, and off-road capability**, this model remains a **good mid-range option**.
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### **Recommendation**
- **Buy if:**- You need a **versatile, adjustable ATV** for **snow, sand, and mixed terrain**.
- You **value the QAS system** for on-the-fly suspension tuning.
- You have **budget for maintenance** and **access to aftermarket parts**.
- You prefer **Ski-Doo s reputation for durability** over the latest tech.
- **Avoid if:**- You require **extreme off-road or sand performance** (consider a **Renegade 1000 or 650** instead).
- You **hate noise and vibration** (rotary engines are loud and can feel rough).
- You want **lower long-term costs** (smaller engines or newer models may be more efficient).
- You **don t have time for maintenance** (this model requires more upkeep than simpler ATVs).
**Final Verdict:** A **great mid-range choice** for riders who want **adjustability and multi-terrain capability**, but not the absolute latest technology. If you find a **well-maintained example with service records**, it can be a **solid investment**. Otherwise, consider **newer models or specialized off-road ATVs** for better efficiency and performance.
Good shape and complete as shown, one stainless bolt is missing. Please verify fitment to your machine prior purchasing. Removed from a 2018 Renegade XRS 850. Used parts may be dirty/scratched/blemished and or have marks from normal use.
Troubleshooting electrical issues by swapping parts causes damage. Electrical parts are tested prior to removing from the machine and verified function properly.