PERFORMANCE 311-780 Gp Power Valve Oil Injection Block Plate 800R 1200R 1300R Kit

( Brand: Performance ), ( Manufacturer Part Number: 311-780 ), ( Part Type: Valve Oil Block Plate ), ( Oe Manufacturer: Kawasaki )

Review PERFORMANCE Yamaha Gp Power Valve Oil Injection Block Off Plate Kit fits 800

The **Performance 311-780 Yamaha GP800/GP800R/GP1200R/GP1300R Power Valve Oil Injection Block Plate Kit** is a meticulously engineered aftermarket solution designed to enhance the performance, reliability, and longevity of Yamaha s high-performance sport-touring motorcycles. This premium kit replaces the stock power valve oil injection block plate a critical component that regulates oil flow to the power valves with a high-strength, precision-machined alternative crafted from aerospace-grade aluminum alloy. The upgraded block plate features optimized oil passage geometry, ensuring consistent and efficient lubrication under extreme high-RPM conditions, which is particularly beneficial for aggressive riders pushing the limits of their GP800, GP800R, GP1200R, or GP1300R. Unlike the stock design, which may suffer from wear or clogging over time, this kit incorporates reinforced internal channels and a more robust mounting structure, reducing the risk of oil starvation or valve damage during prolonged high-load operation. The kit also includes a set of precision-machined seals and gaskets, ensuring a leak-proof installation that maintains optimal oil pressure and prevents contamination. Whether you re chasing top-speed stability, improving throttle response, or extending the lifespan of your engine s critical components, this kit delivers a measurable upgrade with minimal installation complexity. Built to withstand the demands of modern sport-touring riding, it s an ideal choice for enthusiasts seeking a balance of performance enhancement and durability without compromising the stock engine s integrity.

### **Pros and Cons of Buying a Performance Oil Injection Block Plate Kit for Yamaha GP800/800R/1200R/1300R Engines**

1. **Improved Power and Performance**

- Oil injection (OI) kits are designed to enhance engine performance by delivering oil directly into the combustion chamber, increasing lubrication and reducing friction. This can lead to noticeable power gains, especially in high-RPM applications.

- The GP800/800R/1200R/1300R engines benefit from better scavenging and combustion efficiency, which translates to smoother power delivery and improved throttle response.

2. **Enhanced Reliability and Longevity**

- By reducing internal friction and wear, oil injection can help prolong the life of critical engine components such as pistons, rings, and bearings. This is particularly useful for high-mileage or heavily modified engines.

- The kit often includes upgraded block plates (crankshaft bearings, main bearings, or connecting rod bearings), which can improve structural integrity and reduce the risk of catastrophic failure.

3. **Better Cooling and Lubrication**

- Oil injection provides an additional cooling effect by carrying heat away from the combustion chamber, reducing thermal stress on the engine. This is beneficial for engines that run hot, such as those in track or aggressive street use.

- The kit may include upgraded oil passages or modified block plates that optimize oil flow, ensuring better lubrication under high-stress conditions.

4. **Compatibility with High-Performance Modifications**

- If you plan to install other performance upgrades (e.g., high-flow exhaust, upgraded camshafts, or forced induction), an oil injection kit can help mitigate the increased stress on the engine. It ensures that the engine remains adequately lubricated and cooled.

- The GP800/800R/1200R/1300R platforms are popular for racing and track use, and oil injection is a common modification in these applications.

5. **Aftermarket Support and Customization**

- Many manufacturers offer kits specifically tuned for these Yamaha engines, ensuring a good fit and reliable performance. Brands like **Performance 311** are well-regarded for their quality and attention to detail.

- The kit can be installed alongside other modifications (e.g., upgraded pistons, forged internals) to create a fully customized engine build.

6. **Potential for Increased Durability in Aggressive Use**

- For riders who push their bikes hard in track days, drag racing, or aggressive street riding, oil injection can help the engine handle the extra stress without premature wear.

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1. **Complex Installation and Technical Skill Required**

- Installing an oil injection kit is not a simple bolt-on modification. It requires disassembling the engine, modifying block plates, routing oil lines, and ensuring proper calibration. This is best left to experienced mechanics or those with mechanical expertise.

- The GP800/800R/1200R/1300R engines have specific oil passage layouts, and improper installation can lead to oil leaks, reduced performance, or even engine damage.

2. **Cost of the Kit and Additional Modifications**

- A high-quality oil injection kit (e.g., from Performance 311) can cost **$500 $1,500 **, depending on the model and additional components included. This is a significant investment, especially for a bike that may not be a daily rider.

- If the engine is already modified or heavily used, you may need to pair the oil injection kit with other upgrades (e.g., upgraded internals, stronger crankshaft) to fully realize its benefits, increasing the total cost.

3. **Potential for Increased Oil Consumption**

- More frequent oil changes (since oil is being consumed faster).

- Potential for oil leaks if the system is not properly sealed.

- Increased maintenance costs over time.

4. **Risk of Voiding Warranty (If Applicable)**

- If your bike is still under manufacturer warranty, installing an oil injection kit may void it, especially if the engine is opened or modified. This is a risk to consider if you plan to keep the bike long-term.

5. **Not a Guaranteed Power Increase**

- The quality of the kit.

- The condition of the existing engine.

- Other modifications paired with it (e.g., exhaust, fueling).

- In some cases, the power gains may be modest, and the cost may not justify the investment for casual riders.

6. **Potential for Increased Maintenance**

- With oil injection, you may need to monitor oil levels more closely, check for leaks, and ensure the system is functioning correctly. This adds to the ongoing maintenance burden.

- If the oil injection system fails (e.g., clogged passages, pump failure), it can lead to engine damage if not addressed promptly.

7. **Limited Benefit for Stock or Mildly Modified Engines**

- If your engine is in good condition and not heavily modified, the benefits of oil injection may be minimal. The kit is more valuable for engines that are already pushed hard or are part of a larger performance build.

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An oil injection block plate kit from **Performance 311** (or a reputable manufacturer) is a **highly effective modification** for Yamaha GP800/800R/1200R/1300R engines, particularly for riders who:

- Plan to use the bike aggressively (track, drag racing, high-speed street riding).

- Are already running other performance upgrades (exhaust, camshafts, fueling).

- Want to extend the life of their engine under heavy loads.

- Are willing to invest in proper installation and maintenance.

However, it is **not a simple or cheap modification** and requires careful consideration of your riding goals, budget, and mechanical expertise. For **casual riders** or those with stock engines, the benefits may not justify the cost. For **serious performance enthusiasts**, it is a valuable addition to a modified engine build.

---

- **If you are a track or performance-focused rider** and already have a modified engine (or plan to build one), **installing an oil injection kit is highly recommended**. Pair it with other upgrades (e.g., upgraded internals, high-flow exhaust) for the best results.

- **If you are a casual rider** or keep your bike stock, the kit may not be worth the investment unless you are experiencing specific engine issues (e.g., excessive wear, poor reliability).

- **Have it professionally installed** to ensure proper calibration and avoid common pitfalls like oil leaks or improper oil flow.

- **Budget for additional maintenance** (more frequent oil changes, potential leaks, and monitoring) to keep the system running smoothly.

- **Consider the long-term value** if you plan to keep the bike for years and push it hard, the kit will pay off in reliability and performance. If you are selling the bike soon, the cost may not be recovered.

**Final Verdict:** For the right rider (performance-focused, mechanically inclined, or willing to invest in a modified engine), a **Performance 311 oil injection block plate kit is a worthwhile upgrade**. For others, it may be an unnecessary expense. Always weigh the pros and cons against your specific needs before purchasing.

Details:

Condition is New. YAMAHA GP 800 800R 1200R 1300R POWER VALVE OIL INJECTION BLOCK OFF PLATE KIT. Shipped with USPS Ground Advantage.

part #: 311780 prices

• $264.95-$300.83

specifications jetskiintakeez:

• for models: 800
• for makes: Yamaha
• brand: Performance
• mpn: 311-780
• part type: Valve Oil Block Plate
• oe manufacturer: Kawasaki

offer jetskiintakeez:

• availability: In Stock
• sold: 0
• started: February 22, 2026
• options: Ship-to-home

general jetskiintakeez:

• condition: New
• Parts Accessories > Personal Watercraft Parts > Intake Fuel Systems

seller jetskiintakeez:

• city: Saint Petersburg, Florida
• # reviews: 464
• rating: 99.0%

shipping jetskiintakeez:

• carrier: USPS
• type: Calculated
• cost: $5.62
• class: Standard, Expedited
• service: USPS Ground Advantage, USPS Priority Mail
• transit: 4-9 Days

returns jetskiintakeez:

• policy: No Returns

payments jetskiintakeez:

• credit card: Visa
• other
• wallet: Google-pay

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