HONDA 15311-393-000 Hondamatic Engine Motor Oil Pump Cover 77-78

( Manufacturer Part Number: 15311-393-000 ), ( Type: Oil Pump Cover )

Review HONDA 77-78 Hondamatic Oem Engine Motor Oil Pump Cover fits CB750A CB 750

The **Honda 15311-393-000** is an essential, high-quality replacement part designed specifically for the **CB750A and CB750 HondaMatic** models produced between **1977 and 1978**. This **engine motor oil pump cover** is a precision-engineered component that plays a critical role in maintaining the lubrication system of the motorcycle s **750cc inline-four engine**. Crafted from durable **cast aluminum**, this cover is designed to fit seamlessly over the oil pump assembly, ensuring proper sealing and structural integrity while protecting internal components from contaminants and wear. Its **tight-tolerance fit** guarantees minimal oil leakage, which is crucial for preventing engine damage and maintaining optimal performance. The cover features **precision-machined mounting surfaces** and **accurately aligned bolt holes**, allowing for a secure installation that aligns perfectly with the engine s oil pump mechanism. This part is not just a functional replacement but also a **vintage restoration piece**, ideal for riders seeking to restore their classic Honda to factory specifications or those looking to upgrade worn-out components. Whether used in a full rebuild or as part of routine maintenance, the **15311-393-000** ensures reliable operation, helping to extend the lifespan of the engine by preventing oil starvation and excessive friction. For collectors and enthusiasts, this genuine Honda part is a must-have for maintaining the authenticity and performance of one of the most iconic motorcycles of the late 1970s.

### **Pros and Cons of buying a Honda 15311-393-000 (CB750A/CB750 HondaMatic Engine Motor Oil Pump Cover)**

1. **Original Equipment Quality (OEM)** This part is manufactured to Honda s exact specifications, ensuring proper fit, function, and compatibility with the CB750A/CB750 HondaMatic engine. Using an OEM part reduces the risk of performance issues or premature wear.

2. **Reliability and Durability** Honda parts are known for their robustness and long-term durability, especially in high-performance applications like the CB750 s oil pump cover. A genuine part is less likely to fail compared to aftermarket alternatives.

3. **Warranty Coverage** Purchasing directly from Honda or an authorized dealer may include warranty protection, offering peace of mind in case of defects or premature failure.

4. **Prevents Oil Leaks and Contamination** The oil pump cover plays a critical role in sealing the oil system. A faulty or improperly fitted cover can lead to oil leaks, air ingestion, or contamination, which can damage the engine over time. Replacing it with an OEM part ensures proper sealing.

5. **Maintains Engine Performance** The oil pump cover is part of the lubrication system. A worn or damaged cover can disrupt oil flow, leading to reduced engine efficiency, increased friction, or even catastrophic failure in severe cases. Replacing it with a new OEM part helps maintain optimal engine performance.

6. **Easier Installation and Compatibility** Since it s a direct replacement part, installation is straightforward, and there s no need for modifications. It fits seamlessly into the engine bay without compatibility issues.

7. **Resale Value Preservation** Keeping the bike in top condition with genuine parts helps maintain its resale value, especially for classic or high-demand models like the CB750.

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1. **Higher Cost** OEM parts from Honda are significantly more expensive than aftermarket alternatives. The price may be a barrier for budget-conscious buyers or those who prioritize cost savings over brand reliability.

2. **Limited Availability** Depending on the region, genuine Honda parts may not always be readily available in local stores. Buyers may need to order online, which could involve shipping delays or additional costs.

3. **Potential Overkill for Minor Issues** If the oil pump cover is only slightly damaged or worn, some riders might consider a cheaper repair (e.g., sealing leaks with gaskets or adhesives) instead of replacing the entire cover. However, this is not always recommended, as improper fixes can lead to bigger problems.

4. **Time-Consuming Replacement** Replacing the oil pump cover requires disassembling part of the engine, which can be labor-intensive, especially for inexperienced mechanics. This may necessitate professional help, adding to the overall cost.

5. **Mixed Perception of Necessity** Some riders debate whether the oil pump cover is a "wear item" that needs frequent replacement or if it lasts the lifetime of the engine. While it s not a high-wear part, neglecting it can lead to issues, so proactive replacement is advisable.

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The **Honda 15311-393-000 oil pump cover** is a critical but often overlooked component for maintaining the health of the CB750A/CB750 HondaMatic engine. While it comes with a higher price tag and potential inconveniences like installation complexity, the **benefits far outweigh the drawbacks** for serious riders. Using an OEM part ensures reliability, prevents costly engine damage, and preserves the bike s performance and longevity.

For riders who prioritize **long-term engine health and reliability**, investing in the genuine Honda part is justified. However, those on a tight budget or dealing with a minor issue might consider aftermarket options (with caution) or consulting a mechanic to assess whether replacement is truly necessary.

- You suspect leaks, contamination, or unusual noise from the oil pump area.

- You re performing a major engine service or restoration.

- You value Honda s reputation for quality and want to avoid potential long-term issues.

- You re keeping the bike for the long term and want to maintain its value.

- The part is only slightly damaged, and you re confident in diagnosing the exact issue.

- You re working with a trusted aftermarket supplier that offers high-quality, compatible replacements (e.g., parts from reputable brands like **Genuine Honda, Yoshi s, or Speedhawk**).

- You re on a tight budget but are willing to monitor the engine closely for signs of trouble.

Ultimately, **proactive replacement with an OEM part is the safest choice** for the CB750 s longevity, especially since the part is relatively inexpensive compared to potential engine damage. If in doubt, consult a Honda specialist or mechanic before deciding.

Details:

Removed From NA. 77-78 HONDA CB750A CB 750 A HONDAMATIC OEM ENGINE MOTOR OIL PUMP COVER, This oil pump cover is in very good condition and shows normal signs of wear. BIN #42B, Please review all pictures to assess the condition of item.

part #: 15311393000 prices

• $8.37-$14.99

specifications transmissioncycleoi:

• for models: Cb750a, Cb, 750
• for makes: Honda
• mpn: 15311-393-000
• type: Oil Pump Cover

payments transmissioncycleoi:

• credit card: Diners-club
• wallet: Paypal
• other

returns transmissioncycleoi:

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

shipping transmissioncycleoi:

• transit: 5-11 Days
• type: Fixed
• service: Standard
• cost: $0.00
• class: Standard

seller transmissioncycleoi:

• city: Spokane, Washington
• # reviews: 7453
• rating: 99.1%

offer transmissioncycleoi:

• options: Ship-to-home
• started: June 5, 2026
• quantity: 1
• availability: In Stock
• best offers: True
• sold: 0

general transmissioncycleoi:

• condition: Used
• Motorcycle Scooter Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain Parts

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