fits model: 750. make: Aprilia. year: 2008–2015.

( Manufacturer Part Number: 85495200XH7 ), ( Part Type: Frame Seat )
The **Aprilia Dorsoduro 750 (Part Number: 85495200XH7, Model Year: 2009, Serial Range: 08-15)** rear frame, chassis, and seat rail assembly represents a critical and high-performance component of one of the most iconic and technologically advanced sport-touring motorcycles of its era. Designed with precision engineering and aerodynamic efficiency in mind, this assembly forms the backbone of the Dorsoduro s revolutionary chassis architecture, blending the agility of a naked bike with the comfort and stability of a touring machine. The frame is crafted from high-strength steel, featuring a **double-cradle design** that optimizes weight distribution while maintaining rigidity, ensuring exceptional handling and responsiveness across a wide range of riding conditions from spirited cornering on twisty roads to long-distance stability on highways. The **chassis rails**, machined to exacting tolerances, integrate seamlessly with the engine and suspension, contributing to the Dorsoduro s legendary balance between sportiness and practicality. The **seat rail**, in particular, is engineered to accommodate the ergonomic contours of the bike s ergonomic design, providing both comfort for extended rides and a sporty riding position that enhances control and precision. This assembly is not merely a structural component but a testament to Aprilia s commitment to innovation, offering riders a blend of cutting-edge technology and timeless craftsmanship that defines the Dorsoduro s legacy as a motorcycle that transcends conventional boundaries. Whether restored or used as a replacement for maintenance, this part ensures that the Dorsoduro retains its reputation for being one of the most versatile and exhilarating sport-touring bikes ever produced.
### **Pros and Cons of Buying a 2009 Aprilia Dorsoduro 750 (Chassis #85495200XH7) with a Rear Frame/Chassis/Seat Rail Issue**
#### **Pros**
1. **Strong Brand Reputation** Aprilia is a well-respected motorcycle manufacturer known for reliability, performance, and innovative engineering. The Dorsoduro 750 is part of Aprilia s successful line of sport-touring bikes, which are praised for their balance of sportiness and comfort.
2. **Excellent Performance** The 2009 Dorsoduro 750 features a 750cc parallel-twin engine (derived from the RS 750) that delivers strong power (around 70-75 hp) and smooth torque. It handles well on both twisty roads and highways, making it versatile for different riding styles.
3. **Comfortable for Long Rides** The Dorsoduro is designed with touring in mind, offering a relaxed riding position, ergonomic seating, and adequate wind protection. The suspension (Ohlins front, rear) is well-tuned for both sport and comfort, though aging parts may need attention.
4. **Modular and Upgradable** Aprilia s modular design allows for easy upgrades, such as aftermarket exhausts, suspension tuning, or engine modifications. The bike s frame is sturdy, and many components are replaceable or repairable.
5. **Good Fuel Economy for a Sport-Tourer** Compared to modern sport-tourers, the 2009 Dorsoduro is relatively fuel-efficient, averaging around **40-50 mpg (6-7 L/100km)** depending on riding style. This is better than many modern sportbikes but worse than cruisers or naked bikes.
6. **Resale Value** Aprilia bikes, especially well-maintained ones, hold their value reasonably well. The Dorsoduro 750 is still sought after by enthusiasts, which could be beneficial if you plan to sell it later.
7. **Reliability (If Well-Maintained)** The parallel-twin engine is known for durability if properly serviced. Many examples last well beyond 100,000 miles with regular maintenance. However, neglect can lead to costly failures.
8. **Aftermarket Support** There is a strong aftermarket community for Aprilia sport-tourers, with available parts for suspension, brakes, exhausts, and electronics (e.g., ECU tuning).
9. **Aesthetic Appeal** The Dorsoduro has a sleek, aggressive yet refined look that remains stylish even by today s standards. Its fairing design is iconic among sport-touring bikes.
10. **Potential for Restoration** If you re mechanically inclined or willing to invest time/money, restoring a well-framed bike like this can be rewarding. Many owners enjoy the process of bringing an older bike back to peak condition.
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#### **Cons**
1. **Rear Frame/Chassis/Seat Rail Issue** The most significant drawback is the **rear frame or seat rail problem**. Frame cracks, especially in the seat rail area, are a known issue on some Aprilia models (including the Dorsoduro 750). This can be a **major safety concern** if not properly addressed.
- **Symptoms:** Cracks may not always be visible without close inspection. Signs include:- A **squeaking or rubbing noise** when riding.
- **Excessive flex** in the seat rail area.
- **Visible cracks** (often near the seat rail attachment points).
- **Repair Cost:** Fixing a cracked frame can be **expensive ( 1,500 3,000 )** depending on labor and parts. Some owners opt for **frame replacement** (used or new), which can be costly.
- **Risks:** A compromised frame can lead to **structural failure**, which is dangerous. If the seller cannot provide proof of a **professional frame inspection/repair**, this is a **dealbreaker** for many buyers.
2. **Aging Suspension and Brakes** The Ohlins suspension on the 2009 model is decent but will have **worn-out bushings, shocks, and springs** after 15 years. The **front forks** may need replacement, and the **rear shocks** often leak or lose firmness.
- **Brakes:** The **Brembo 4-piston front calipers** are good, but pads and rotors will need replacement. The **rear brake** is less powerful but adequate.
3. **Electronics and Fuel System Wear** The **ECU, injectors, and fuel pump** may require attention. Modern bikes have more advanced electronics, so some features (like traction control) may not work reliably.
- **Throttle body** can become sticky over time.
- **Fuel system** may need a **fuel filter replacement** and **carburetor cleaning** (if applicable).
4. **Tires and Wear Items** The **tires** will likely be **old and unsafe** (check for cracks, dry rot, or low tread). Replacing them is a **must** before riding.
- **Chain and sprockets** will need lubrication and possible replacement.
- **Belts/drive system** (if applicable) may stretch over time.
5. **Maintenance History Unknown** Without a **complete service history**, it s hard to know if the bike has been **properly maintained**. Key areas to check:
- **Engine oil changes** (parallel-twins are sensitive to oil degradation).
- **Valve adjustments** (timing belt replacement if due).
- **Suspension service** (bushings, seals).
- **Brake fluid changes** (DOT 4 recommended).
6. **Modern Comparisons** Newer sport-tourers (e.g., **Ducati Multistrada, BMW S 1000 XR, Yamaha Tracer 9 GT**) offer **better electronics, ergonomics, and safety features** (ABC, cornering ABS, traction control). If you want **cutting-edge tech**, this bike is outdated.
7. **Fuel and Emissions** The 2009 model predates **Euro 4/5 emissions standards**, meaning it may not meet modern **smog regulations** in some areas. Some countries require **catalytic converter checks**, which could be a hassle.
8. **Weight and Handling** At **around 200 kg (440 lbs)**, the Dorsoduro is **heavier than modern sportbikes** but lighter than full touring bikes. While manageable, it s not as nimble as a **Yamaha MT-09** or **Kawasaki Ninja 650**.
9. **Resale Depreciation** While Aprilia bikes hold value better than some, a **15-year-old bike with frame concerns** will depreciate faster than a **well-maintained modern alternative**.
10. **Potential Hidden Costs** Beyond the frame, other **major components** (engine, transmission, electrical) may be **close to their lifespan**. A **full rebuild** could be costly if the bike has high mileage.
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### **Key Questions to Ask the Seller Before Buying**
1. **Has the frame been professionally inspected or repaired?** (Ask for **photos/videos of the frame** or a **frame inspection report**.)
2. **What is the full service history?** (Oil changes, valve adjustments, suspension service, etc.)
3. **Has the bike been in an accident?** (Even minor crashes can weaken the frame.)
4. **Are there any known issues with this specific chassis?** (Check **Aprilia forums** or **frame databases** like FrameCheck (https://www.framecheck.com).)
5. **What is the current mileage?** (Higher mileage increases the risk of **engine wear, suspension failure, or electrical issues**.)
6. **Are all major components in good condition?** (Check **tires, brakes, suspension, belts, and electricals**.)
7. **Is the bike street-legal?** (Check **registration, emissions, and lights**.)
8. **What is included in the sale?** (Helmet, toolkit, spare parts, etc.?)
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### **Conclusion & Recommendation**
#### **Buy If:**You **find a seller who can prove the frame is structurally sound** (no cracks, professionally inspected/repaired).
You **have mechanical skills** or access to a **trusted mechanic** to perform a **full inspection and necessary repairs**.
You **don t mind investing time/money** in restoring the bike to a reliable condition.
You **prioritize classic styling and performance** over modern tech.
You **plan to keep it long-term** and enjoy the **restoration process**.
The **price is significantly below market value** (accounting for the frame risk).
#### **Do Not Buy If:**The **frame has visible cracks or unknown history** this is a **safety risk** that cannot be ignored.
You **cannot afford major repairs** (frame, suspension, brakes, engine).
You **don t have time or knowledge** to properly inspect/maintain the bike.
You **prefer