K-L SUPPLY MN-5749 Diaphragm Fuel Petcock Repair Kit MN/5749

( Brand: K-l Supply ), ( Manufacturer Part Number: MN/5749 ), ( Compatible Year: 1986 1985 1984 1983 ), ( Compatible Model: Gs550e ), ( 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/5749 Diaphragm Only Fuel Petcock Repair Kit Suzuki Dk fits 1983–1986

The **Supply MN/5749 Diaphragm for Fuel Petcock Repair Kit** is a precision-engineered replacement part specifically designed to restore optimal fuel delivery performance in the fuel petcock assembly of **1983 through 1986 Suzuki DK (Dakota) motorcycles**. This diaphragm plays a critical role in regulating fuel flow, preventing air leaks, and maintaining proper carburetor operation by ensuring a consistent and reliable seal within the petcock mechanism. Crafted from high-quality rubber compounds, the diaphragm is engineered to withstand the demands of high-pressure fuel systems while resisting degradation from fuel additives, heat, and environmental exposure over time. Its unique design matches the original specifications of the Suzuki DK s fuel petcock, guaranteeing a perfect fit and seamless integration with the carburetor and fuel line connections. Whether addressing symptoms like fuel starvation, erratic idling, or difficulty starting due to a failing diaphragm, this replacement part is an essential component for restoring the fuel system s efficiency and longevity. Ideal for both professional mechanics and DIY enthusiasts, the diaphragm is part of a comprehensive repair kit that includes all necessary gaskets, seals, and tools to complete a thorough restoration, ensuring your Suzuki DK s fuel delivery system operates with the same precision as when it left the factory.

### Pros and Cons of Buying a Supply MN/5749 Diaphragm for a Fuel Petcock Repair Kit (1983 1986 Suzuki DK)

1. **Compatibility** The MN/5749 diaphragm is specifically designed for the fuel petcock (fuel valve) in 1983 1986 Suzuki DK models, ensuring a proper fit and function without modifications.

2. **Reliability** Fuel petcock diaphragms wear out over time, leading to fuel starvation, hard starting, or stalling. Replacing it with an OEM or high-quality aftermarket part restores proper fuel flow and prevents further issues.

3. **Cost-Effective Repair** Replacing just the diaphragm is significantly cheaper than buying a complete fuel petcock assembly, especially if the rest of the petcock is still functional.

4. **Prevents Fuel Leaks** A failing diaphragm can cause fuel to leak into the air intake or spill outside, leading to a fuel smell and potential fire hazards. A new diaphragm seals properly.

5. **Ease of Installation** The repair kit typically includes clear instructions, and the diaphragm is a straightforward component to replace, requiring minimal tools.

6. **Improved Engine Performance** A faulty diaphragm can restrict fuel delivery, causing rough idling, poor acceleration, or hesitation. Replacing it often restores smooth operation.

7. **Long-Term Solution** If the diaphragm is the only failing part, this repair can extend the life of the fuel petcock, delaying the need for a full replacement.

1. **Limited Availability** OEM diaphragms (like MN/5749) may be hard to find, especially if the part is discontinued. You may need to source it from specialty suppliers or online marketplaces.

2. **Quality Variability** Aftermarket replacements may not match the durability of the original part, potentially requiring more frequent replacements.

3. **Potential for Incorrect Part Selection** If the diaphragm number is misidentified (e.g., wrong year or model variant), the replacement may not fit or function correctly.

4. **Fuel System Contamination Risk** If the old diaphragm is not fully removed or the new one is improperly installed, fuel residue or debris could contaminate the system, affecting performance.

5. **Time-Consuming for DIYers** While the repair is manageable, working on the fuel system requires careful handling to avoid spills or improper sealing, which may frustrate inexperienced mechanics.

6. **Tool Requirements** Some fuel petcocks may require specialized tools (e.g., petcock pullers or torque wrenches) to disassemble and reassemble properly.

7. **Warranty or Insurance Issues** If the vehicle is under warranty or insured, a DIY fuel system repair might void coverage or complicate claims, depending on the policy.

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### **Conclusion**

Replacing the diaphragm in a 1983 1986 Suzuki DK fuel petcock with a **Supply MN/5749 part** is a practical and often necessary repair for restoring proper fuel delivery. The benefits such as improved engine performance, prevention of leaks, and cost savings outweigh the drawbacks, provided the correct part is sourced and installed carefully. However, the cons (availability, quality concerns, and potential DIY challenges) highlight the importance of verifying the part number, ensuring a clean installation, and considering professional help if unsure.

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### **Recommendation**

1. **Verify the Part Number** Double-check that **MN/5749** is indeed the correct diaphragm for your specific Suzuki DK model and year. Cross-reference with the vehicle s service manual or a trusted parts supplier.

2. **Source from a Reliable Supplier** Purchase from a reputable aftermarket parts dealer (e.g., **Supply, RockAuto, or eBay with positive reviews**) or an OEM-equivalent supplier to ensure quality.

3. **Prepare Properly** Have the necessary tools (e.g., petcock puller, torque wrench, fuel line wrench) and safety gear (gloves, eye protection) before starting. Drain fuel lines if possible to minimize spills.

4. **Follow Instructions Carefully** Disassemble and reassemble the petcock methodically, ensuring the new diaphragm is seated correctly and the seals are intact.

5. **Test After Installation** After replacing the diaphragm, start the engine and monitor for smooth operation, fuel leaks, or unusual noises. If issues persist, inspect the installation or consider a full petcock replacement.

6. **Consider Professional Help if Needed** If you lack experience with fuel system repairs, a mechanic familiar with Suzuki vehicles can ensure the job is done correctly, especially if the petcock is difficult to access.

**Final Verdict:** The **Supply MN/5749 diaphragm repair kit** is a worthwhile investment for Suzuki DK owners experiencing fuel petcock symptoms, provided the part is correctly identified and installed. For most DIYers with moderate mechanical skill, this is a manageable and cost-effective fix. If uncertainty exists about the part or installation, consulting a professional is the safer option.

Details:

K L Supply Diaphragm Only for Fuel Petcock Repair Kit 1983 - 1986 Suzuki dk: Status: In Stock.

part #: mn5749 prices

• $21.74-$38.48

specifications intakefuelmotorcycle:

• for makes: Suzuki
• for years: 1983-1986
• brand: K-l Supply
• mpn: Mn/5749
• compatible year: 1986 1985 1984 1983
• compatible model: Gs550e
• 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

general intakefuelmotorcycle:

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

returns intakefuelmotorcycle:

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

offer intakefuelmotorcycle:

• started: May 9, 2026
• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home

shipping intakefuelmotorcycle:

• service: Standard
• type: Fixed
• class: Standard
• transit: 3-5 Days
• cost: $0.00

seller intakefuelmotorcycle:

• rating: 99.2%
• city: Multiple warehouses
• # reviews: 22456

payments intakefuelmotorcycle:

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• wallet: Apple-pay
• credit card: Mastercard

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