K-L SUPPLY MN-P40H Diaphragm Fuel Petcock Repair Lh Kit MN/P40H

( Brand: K-l Supply ), ( Manufacturer Part Number: MN/P40H ), ( Compatible Model: Gs750s Katana ), ( Bundle Description: 1 Pc Genuine K L Supply Diaphragm ), ( Type: Diaphragm Only For Fuel Petcock Repair Kit ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review K L SUPPLY Mn/p40h Diaphragm Only Fuel Petcock Repair Kit Suzuki Lh fits GS750S 1983

The **Supply MN/P40H Diaphragm for Fuel Petcock Repair Kit** is a meticulously engineered replacement part designed specifically for the **1983 Suzuki GS750S LH**, ensuring optimal fuel system performance and reliability. This high-quality diaphragm is crafted from durable, fuel-resistant materials to withstand the demanding conditions of motorcycle fuel systems, including exposure to gasoline vapors, heat, and mechanical stress. Engineered to fit seamlessly within the **MN/P40H fuel petcock assembly**, this diaphragm plays a critical role in regulating fuel flow while preventing leaks, vapor lock, and contamination key factors that contribute to engine efficiency and longevity. The precision-molded design ensures a tight seal, minimizing the risk of fuel spillage or air infiltration, which can lead to erratic idling, poor acceleration, or even engine stalling. Whether addressing a leaky petcock, replacing a worn-out diaphragm, or performing routine maintenance, this part is an essential component for restoring the fuel system s integrity. Its compatibility with the **1983 Suzuki GS750S LH** model guarantees a perfect fit, allowing for straightforward installation without the need for modification or adaptation. By incorporating this diaphragm into your repair kit, you re investing in a solution that enhances fuel delivery consistency, reduces the likelihood of operational failures, and helps maintain the iconic performance and reliability of your classic Suzuki motorcycle.

**Pros and Cons of Buying a Supply MN/P40H Diaphragm for a Fuel Petcock Repair Kit for a 1983 Suzuki GS750S LH**

1. **Compatibility** The Supply MN/P40H diaphragm is specifically designed for the Suzuki GS750S LH fuel petcock, ensuring a proper fit and function. This reduces the risk of leaks, improper sealing, or damage to the petcock itself.

2. **Quality and Reliability** Supply is a well-regarded brand in the motorcycle aftermarket, known for producing durable and high-performance parts. Their diaphragms are often made from materials that resist fuel degradation and heat better than generic or lower-quality alternatives.

3. **Ease of Installation** The diaphragm is a straightforward component to replace, and since it s part of a repair kit, it comes with necessary tools or instructions, making the job easier for even those with limited mechanical experience.

4. **Prevents Fuel Leaks and Engine Stalling** A failing diaphragm is a common cause of fuel starvation, where the petcock fails to supply fuel properly, leading to rough idling, stalling, or difficulty starting. Replacing it resolves these issues.

5. **Cost-Effective Repair** Replacing just the diaphragm is significantly cheaper than buying a new fuel petcock. This makes it a practical solution for minor wear rather than a full component replacement.

6. **Availability** Supply parts are widely available through online retailers, motorcycle specialty shops, and eBay, ensuring you can easily source the part without long waits.

1. **Limited Longevity** Even a high-quality diaphragm may not last indefinitely, especially if the rest of the fuel petcock is worn or if the bike is frequently ridden in harsh conditions (e.g., extreme heat, cold, or contaminated fuel).

2. **Potential for Counterfeit Parts** If purchasing from an untrusted seller (particularly online), there is a risk of receiving a counterfeit or low-quality replica that fails prematurely. Always buy from reputable dealers.

3. **Skill Dependency** While the replacement is relatively simple, improper handling (e.g., cross-threading, over-tightening, or using the wrong tools) could damage the petcock or diaphragm, necessitating further repairs.

4. **Kit Inclusivity** Some repair kits may not include all necessary tools (e.g., a proper petcock wrench or gasket scraper), requiring additional purchases, which could add to the overall cost.

5. **Fuel System Contamination Risk** If the old diaphragm was leaking fuel for an extended period, there may be residual fuel or debris in the system. Flushing the fuel lines afterward is advisable to prevent clogs or injector issues.

The Supply MN/P40H diaphragm is an excellent choice for repairing the fuel petcock on a 1983 Suzuki GS750S LH. Its compatibility, reliability, and ease of installation make it a practical solution for addressing fuel-related issues like leaks or starvation. However, the success of the repair depends on sourcing the part from a trusted supplier, performing the installation carefully, and ensuring the rest of the fuel system is clean and functional.

Purchase the **Supply MN/P40H diaphragm as part of a complete fuel petcock repair kit** from a reputable dealer (such as Supply s official website, a trusted motorcycle parts store, or a verified eBay seller). Before installation:

- Ensure you have the correct tools (petcock wrench, gasket scraper, new gasket if needed).

- Clean the petcock and surrounding area thoroughly to remove old gasket material and debris.

- Consider flushing the fuel lines afterward to clear any contaminants.

- If the petcock shows significant wear (e.g., cracked body, corroded threads), consider replacing the entire unit for long-term reliability.

For most riders, this is a cost-effective and straightforward fix that restores proper fuel flow without the expense of a full petcock replacement.

Details:

K L Supply Diaphragm Only for Fuel Petcock Repair Kit 1983 Suzuki GS750S lh: Status: In Stock.

part #: mnp40h price

• $38.48

specifications intakefuelmotorcycle:

• for makes: Suzuki
• for years: 1983
• brand: K-l Supply
• mpn: Mn/p40h
• compatible model: Gs750s Katana
• bundle description: 1 Pc Genuine K L Supply Diaphragm
• type: Diaphragm Only For Fuel Petcock Repair Kit
• core charge: Free No Core Charge
• fitment type: Direct Replacement

seller intakefuelmotorcycle:

• rating: 99.3%
• city: Multiple warehouses
• # reviews: 23970

offer intakefuelmotorcycle:

• options: Ship-to-home
• sold: 0
• started: June 10, 2026
• availability: In Stock
• quantity: 1

general intakefuelmotorcycle:

• condition: New
• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery

shipping intakefuelmotorcycle:

• class: Standard
• type: Fixed
• transit: 2-5 Days
• service: Standard
• cost: $0.00

payments intakefuelmotorcycle:

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

returns intakefuelmotorcycle:

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

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