YAMAHA 6P2-00 Lower Thermostat Housing 225 V6

( Manufacturer Part Number: 6P2-00 ), ( Part Type: Hp Thermostat Housing ), ( Country Of Origin: Japan )

Review YAMAHA 225 Hp V6 Lower Thermostat Housing fits 200 250 2008–2019

The **Yamaha FJR1300A (2008 2019) 6P2-00 Lower Thermostat Housing** is a precision-engineered component designed to regulate the cooling system of Yamaha s iconic sport-touring motorcycle, ensuring optimal engine performance across a broad power spectrum from the **200 hp** output of the 2008 model to the **250 hp** delivered by the refined 2019 iteration. Crafted from high-grade aluminum alloy, this thermostat housing is built to withstand the extreme thermal cycling inherent in high-performance riding, where temperatures can fluctuate dramatically between highway cruising and aggressive cornering. The housing features a robust, ribbed design that enhances structural integrity while minimizing weight, allowing for efficient heat dissipation and maintaining consistent coolant flow to the engine s critical components. Its seamless integration with the **6P2-00** thermostat assembly ensures reliable temperature control, preventing overheating under sustained load while optimizing fuel efficiency and reducing emissions. This part is a direct OEM replacement, meticulously machined to Yamaha s exacting standards, guaranteeing a perfect fit with the motorcycle s cooling system, including the radiator and water pump. Whether you re a performance enthusiast pushing the limits of your FJR1300A or a rider seeking long-term reliability, this thermostat housing is an essential upgrade or replacement part that contributes to the bike s longevity and consistent power delivery, from the **225 hp** mid-range models to the high-output variants. Built to endure the rigors of daily commuting, weekend adventures, or high-speed touring, it exemplifies Yamaha s commitment to durability and engineering excellence in their legendary sport-touring platform.

### **Pros and Cons of Buying a Yamaha FZ6 2008 2019 (6P2-00, 200 250 HP V6, Lower Thermostat Housing)**

#### **Pros**

1. **High Performance Engine**

The 6P2-00 V6 engine is a powerful and reliable powerplant, especially in the 200 250 HP range. It delivers strong acceleration and top-end speed, making it ideal for sporty riding. The twin-turbo setup (on later models) enhances throttle response and power delivery, particularly in the mid-to-high RPM range.

2. **Strong Aftermarket Support**

Yamaha s V6 engine has a dedicated aftermarket community, with readily available parts, upgrades, and tuning solutions. Common modifications include exhaust systems, intake upgrades, and ECU remaps, which can further enhance performance. The lower thermostat housing (LTH) swap is a popular mod for better cooling and reliability, especially in high-performance builds.

3. **Durability and Reliability (With Proper Maintenance)**

When maintained correctly, the 6P2-00 engine is known for longevity. Many owners report trouble-free operation for well over 100,000 miles, particularly if they address common wear points like timing chain tensioners, oil pumps, and valve seals. The V6 architecture is robust, and with the right mods (like the LTH), it can handle aggressive riding styles.

4. **Sporty Handling and Ergonomics**

The FZ6 is designed for aggressive, sporty riding with a low seat height, aggressive fairings, and a firm suspension setup. The ergonomics are well-suited for track days and spirited highway cruising. The bike s weight (around 450 480 lbs) provides a good balance of agility and stability.

5. **Resale Value (Compared to Some Rivals)**

While not as high as a Honda CBR1000RR or Ducati Panigale, the FZ6 retains decent resale value, especially in lower-mileage examples with a service history. The V6 engine s reputation for durability helps maintain its market appeal.

6. **Lower Thermostat Housing (LTH) Modification Benefits**

The stock thermostat housing can be a weak point, leading to overheating or coolant leaks. Swapping it for a reinforced lower thermostat housing (commonly from the FZ10 or aftermarket brands) improves cooling efficiency and reduces the risk of failure. This mod is relatively straightforward and cost-effective compared to other engine upgrades.

7. **Versatility for Modifications**

The FZ6 is a favorite among tuners due to its modular nature. Owners can easily upgrade components like the exhaust, intake, intercooler, and suspension. The bike s open fairings also allow for custom paint and bodywork without major structural changes.

---

#### **Cons**

1. **Complexity and Maintenance Costs**

- **Timing Chain & Tensioners** These can wear out and may require replacement every 60,000 100,000 miles if not serviced properly.

- **Oil Pump & Oil Leaks** Some models (especially earlier 2008 2012) have had issues with oil leaks from the oil pump housing or seals. Upgrading to a reinforced oil pump or using high-quality synthetic oil is recommended.

- **Valve Seals & Carbon Buildup** The V6 is prone to carbon buildup and valve seal leaks, which can lead to oil consumption and misfires. Regular valve clearing and seal replacements are necessary.

- **Cooling System** The stock thermostat housing is a common failure point, leading to overheating. The LTH swap is highly recommended but adds to upfront costs.

These issues can add up in maintenance expenses, especially if the bike isn t properly serviced.

2. **Throttle Response and Tuning Challenges**

While the V6 is powerful, the stock ECU can feel sluggish in lower RPM ranges. Many owners opt for a remap or aftermarket ECU (like Haltech or Power Commander) to improve throttle response and power delivery. Without tuning, the bike can feel underpowered in comparison to similarly priced rivals.

3. **Weight and Fuel Economy**

At around 450 480 lbs, the FZ6 is heavier than some sportbikes (e.g., Honda CBR600RR or Kawasaki Ninja 400), which can make it less nimble in tight corners. Fuel economy is also modest, averaging around **35 45 MPG**, depending on riding style and modifications. Aggressive riding or power upgrades will further reduce efficiency.

4. **Comfort for Long Rides**

The FZ6 is built for sporty, aggressive riding rather than comfort. The firm suspension, upright riding position, and lack of wind protection make it less ideal for long-distance touring. Riders seeking a more relaxed position may find it fatiguing on extended trips.

5. **Reliability Concerns in Early Models (2008 2010)**

- **Oil leaks** from the oil pump housing or valve cover gasket.

- **Timing chain stretch** leading to misfires or rough idle.

- **Cooling system failures** due to the weak thermostat housing.

Later models (2011 2019) addressed some of these issues, but the LTH swap remains a wise upgrade for all years.

6. **Noise and Vibration**

The V6 engine is loud, especially at high RPMs, which can be exhausting over long periods. The bike also has noticeable vibration at certain RPM ranges, particularly in the mid-range. Aftermarket exhausts can help mitigate some of the noise but may not eliminate it entirely.

7. **Parts and Labor Costs**

While Yamaha parts are generally affordable, labor costs can add up, especially for specialized work like timing chain or valve seal replacements. Some aftermarket parts (e.g., reinforced oil pumps, custom exhausts) may require professional installation.

8. **Limited Stock Performance**

The stock FZ6 is not as fast as its competitors in the same class (e.g., Suzuki GSX-R1000, Ducati Panigale, or BMW S1000RR) due to its heavier weight and less aggressive aerodynamics. Without modifications, it may feel underpowered compared to these bikes.

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### **Conclusion**

The **Yamaha FZ6 (2008 2019, 6P2-00, 200 250 HP, with lower thermostat housing mod)** is a **highly tunable, powerful, and engaging sportbike** that excels in performance and aftermarket potential. It is best suited for riders who:

- Enjoy aggressive, spirited riding.

- Are willing to invest in maintenance and modifications (especially the LTH swap).

- Prioritize power and handling over comfort or fuel efficiency.

- Appreciate a bike with strong aftermarket support and tuning options.

- Seek a comfortable, long-distance touring bike.

- Want minimal maintenance hassles (the V6 requires diligent upkeep).

- Prefer a lighter, more fuel-efficient sportbike.

- Are unwilling to budget for potential engine upgrades (timing chain, oil pump, valve seals).

### **Recommendation**

If you are an **enthusiastic rider** who enjoys **modifying and pushing a bike s limits**, the FZ6 is an excellent choice **especially if you plan to swap the lower thermostat housing and invest in basic maintenance**. It offers **strong power, a loyal following, and endless tuning potential**.

- Riders who want a **V6 sportbike** with **aftermarket flexibility**.

- Those who prioritize **performance over comfort**.

- Buyers who are **prepared for regular maintenance** (timing chain, oil leaks, valve seals).

- You want a **touring-friendly** or **low-maintenance** bike.

- You dislike **complex engines** or **higher repair costs**.

- You prefer **lighter, more efficient** sportbikes (e.g., CBR1000RR, GSX-R1000).

The FZ6 is a **fantastic bike for the right rider** one who embraces its quirks and is willing to put in the work to keep it running smoothly. With the **LTH swap and proper maintenance**, it can be a **reliable, high-performance machine** for years. However, it is **not a plug-and-play bike** and requires **attention to detail** to avoid common failure points. If you re ready for that challenge, it s a fantastic purchase.

Details:

Removed from model F225XA, a 2014 225 hp Yamaha. Parts are in great shape.

part #: 6p200 prices

• $49.00-$250.00

specifications ouboaen:

• for models: 200, 250
• for makes: Yamaha
• for years: 2008-2019
• mpn: 6p2-00
• part type: Hp Thermostat Housing
• country of origin: Japan

offer ouboaen:

• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: February 5, 2026

shipping ouboaen:

• carrier: USPS
• service: USPS Ground Advantage
• transit: 4-7 Days
• type: Fixed
• cost: $9.90
• class: Standard

payments ouboaen:

• credit card: Mastercard
• other
• wallet: Apple-pay

returns ouboaen:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Other

seller ouboaen:

• rating: 100.0%
• # reviews: 12208
• city: Flushing, Michigan

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