fits make: Yamaha.

( Brand: Riva ), ( Manufacturer Part Number: WPS59-2209 ), ( Part Type: Intake Manifold ), ( Universal: No )
The **Riva WPS59-2209 (59-2209, RY12040-IMUK) Intake Manifold Kit** is a precision-engineered aftermarket upgrade designed specifically for Yamaha outboard motors, particularly those in the **200 250 horsepower range**, including models like the **F200, F225, F250, and their variants**. This high-performance intake manifold kit is crafted to enhance airflow efficiency, improve throttle response, and boost overall engine performance while maintaining reliability and durability. The kit features a **custom-machined aluminum intake manifold** that replaces the stock component, incorporating a **larger, more aerodynamic plenum** to reduce turbulence and optimize air-fuel mixture delivery. The design includes **integrated throttle body mounting points** and **precise port sizing** to ensure a seamless connection with the engine s intake runners, minimizing restrictive bottlenecks that can limit power output. Engineered with **high-grade aluminum alloy**, this manifold is lightweight yet robust, capable of withstanding the stresses of high-performance operation while resisting warping or deformation under heat. The kit also includes **compatible gaskets and mounting hardware**, ensuring a secure and leak-free installation. Whether you're tuning for racing, towing, or simply maximizing power on the water, this intake manifold kit is a strategic upgrade for Yamaha outboard enthusiasts seeking a noticeable improvement in horsepower, torque, and drivability without compromising the engine s longevity. Ideal for both stock and modified setups, it pairs seamlessly with other performance upgrades like high-flow air filters, exhaust systems, and ECU tuning to deliver a cohesive power boost. Built to meet the demands of serious boaters and performance-minded operators, the **Riva WPS59-2209 intake manifold kit** is a standout choice for those looking to push their Yamaha outboard to its full potential.
### **Pros and Cons of buying a Riva WPS59-2209 (Yamaha 59-2209/RY12040 IMUK Intake Manifold Kit)**
#### **Pros:**1. **Performance Improvement** The intake manifold kit is designed to enhance airflow into the engine, which can improve throttle response, horsepower, and torque, especially in naturally aspirated Yamaha outboards like the 200 HP series (e.g., F200, F225, F250).
2. **OEM Compatibility** The part is specifically engineered for Yamaha s 59-2209 and RY12040 intake manifold systems, ensuring a proper fit without modification.
3. **Durability** Riva is a reputable manufacturer known for high-quality marine aftermarket parts, often made from corrosion-resistant materials suitable for saltwater environments.
4. **Ease of Installation** Designed to replace the stock manifold with minimal disassembly, reducing labor time compared to custom fabrication.
5. **Cost-Effective Upgrade** Compared to full engine rebuilds or custom manifolds, this kit offers a relatively affordable way to gain performance gains.
6. **Compatibility with Tuning** Works well with ECU tuning (e.g., Powerhouse, Yamaha Marine Tuning) to maximize gains, though tuning is recommended for best results.
7. **Reduced Backpressure** The optimized design helps reduce intake restriction, allowing the engine to breathe better under load.
#### **Cons:**1. **Requires Tuning for Full Potential** While the manifold itself improves airflow, the engine control unit (ECU) may need reprogramming to prevent fueling issues or detonation. Without tuning, gains may be limited or the engine could run poorly.
2. **Saltwater Corrosion Risk** Even though Riva parts are marine-grade, prolonged exposure to saltwater can still lead to wear over time, requiring periodic inspection and maintenance.
3. **Potential Void on Warranty** Modifying the intake manifold may void the factory warranty on the outboard, depending on Yamaha s policies.
4. **Limited to Specific Models** Only compatible with Yamaha engines using the 59-2209 or RY12040 intake manifold (e.g., F200, F225, F250). Not universal across all Yamaha models.
5. **Installation Skill Required** While straightforward, improper sealing or gasket application can lead to leaks or performance issues. Some mechanical skill is recommended.
6. **No Major Aesthetic Change** Unlike some aftermarket kits, this is a functional upgrade rather than a cosmetic one, so the boat s appearance remains largely unchanged.
7. **Market Availability** May not be as widely stocked as OEM parts, requiring purchase from specialty marine suppliers or online retailers.
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### **Conclusion**
The **Riva WPS59-2209 intake manifold kit** is a solid choice for Yamaha outboard owners looking to enhance performance in their 200 HP series engines. It offers measurable gains in airflow and power when paired with proper tuning, and its compatibility with Yamaha s stock systems makes it a practical upgrade. However, the necessity of tuning to avoid engine issues and the potential warranty implications are critical factors to consider.
For **best results**, this kit is ideal for:- Boaters running stock ECUs who are willing to invest in tuning.
- Those who prioritize performance over aesthetics and want a straightforward, high-quality upgrade.
- Owners of Yamaha F200, F225, or F250 models with the correct manifold code.
For **those who prefer simplicity or are unwilling to tune**, a stock manifold may suffice, or a less invasive upgrade (e.g., a high-flow air filter) could be considered instead.
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### **Recommendation**
**Buy the Riva WPS59-2209 kit if:**- You have a compatible Yamaha outboard (F200/F225/F250 with 59-2209/RY12040 manifold).
- You plan to use it with an ECU tuner (e.g., Powerhouse, YMT) to unlock full performance gains.
- You re comfortable with basic installation or have a marine mechanic assist.
- You operate in environments where performance is prioritized over warranty concerns.
**Avoid if:**- You re not prepared to tune the engine, as gains will be minimal or the engine may run poorly.
- Your boat s warranty is critical, and Yamaha s policies on modifications are unclear.
- You re unsure about the manifold s compatibility with your exact engine model.
**Final Verdict:** A worthwhile upgrade for performance-focused Yamaha outboard owners who are willing to invest in tuning, but not a necessary purchase for those seeking only minor improvements or who prefer stock reliability.
Precision tapered billet sleeve directly replaces restrictive mesh element in intake manifold. Requires Coast Guard approved aftermarket filter kit to meet flame arrest requirements. Features: Enables Yamaha 1.8 Liter naturally aspirated engine to produce more horsepower by delivering increased air flow. Provides low end punch and mid range pull.
Riva testing has determined the stock ECU will compensate for increased air flow. These items are designed exclusively for closed course competition use ONLY. Quick and easy installation. This fitment information is based upon the stock version of motorcycle or unit referenced and any accessory added other modification could invalidate quick reference provided.
2008- 2015 1800 Wave Runner SHO, 2009 - 2016 Yamaha GX A FZS 2010 -2011, 2014 Cruiser 2010 -2011, 2014 Yamaha GX FZR 2012 2023YamahaFX HO Wave Runner, 2014 2024YamahaFX SVHO 2015 2019YamahaFX HO, 2015 2019YamahaVX VXR, 2015 - 2016 VXS, 2016 2023YamahaVX 2017 Limited 2017 Yamaha GP 2023YamahaGP R.