HARLEY-DAVIDSON 1421-42 Slot Steel Air Cleaner Backing Plate 1402-41 Linkert P757

( Brand: Harley-davidson ), ( Manufacturer Part Number: 1421-42 ), ( Part Type: Cleaner Plate ), ( Compatible Make: For Harley-davidson ), ( Oe/oem Part Number: 1402-41 ), ( Compatible Model: Servi-car ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON Inch J slot Stainless Steel Air Cleaner Backing Plate Linkert

The **Harley-Davidson 1421-42 J-Slot Steel Air Cleaner Backing Plate**, paired with the **1402-41 Linkert P757** air cleaner assembly, represents a premium upgrade for enthusiasts seeking both performance and durability in their motorcycle s intake system. This meticulously engineered component is designed to replace the stock rubber or plastic backing plate found on many Harley-Davidson engines, particularly those equipped with the Linkert P757 air cleaner a high-performance alternative to the factory unit. Crafted from heavy-duty steel, the **1421-42 J-Slot backing plate** features a precision-machined design that ensures a secure, vibration-resistant fit, eliminating the risk of flexing or warping under high RPMs or aggressive riding conditions. The "J-Slot" configuration allows for a snug, interference-fit installation, reducing air leakage and improving airflow efficiency while maintaining a tight seal between the air cleaner and the engine s intake manifold. This backing plate is compatible with a wide range of Harley-Davidson models, including the Sportster, Dyna, and some Touring models, making it a versatile choice for riders looking to enhance their bike s breathing capabilities without compromising on strength or reliability. When paired with the **Linkert P757**, a high-flow, dual-element air cleaner known for its superior filtration and airflow characteristics, this setup delivers a noticeable increase in horsepower and torque by minimizing intake restriction. The steel construction of the backing plate also resists heat and deformation better than plastic alternatives, ensuring long-term performance even under demanding conditions. Whether installed on a stock engine or as part of a more extensive intake upgrade, this combination of components exemplifies Harley-Davidson s commitment to both heritage engineering and modern performance enhancements, offering riders a balance of rugged durability and measurable power gains.

### **Pros and Cons of buying a Harley-Davidson 1421-42 J-Slot Steel Air Cleaner Backing Plate (1402-41 Linkert P757)**

1. **OEM Quality and Fit** This is a genuine Harley-Davidson part, meaning it is designed to match the exact specifications of your motorcycle. It ensures a proper fit without modifications, reducing the risk of leaks or improper sealing.

2. **Durability** The steel construction is robust and built to withstand the demands of motorcycle use, including vibrations and exposure to the elements. It should last the lifespan of the air cleaner system if properly maintained.

3. **Compatibility with Linkert P757** The part is explicitly listed as compatible with the Linkert P757 air cleaner, which is a popular aftermarket upgrade for Harley-Davidson bikes. This means it integrates seamlessly with the Linkert system, improving airflow and performance.

4. **Easy Installation** As an OEM-style part, it should be straightforward to install, especially if you re familiar with basic motorcycle maintenance. No special tools or modifications are typically required beyond standard procedures.

5. **Reliability** Harley-Davidson parts are known for their reliability, reducing the likelihood of premature failure or compatibility issues. This can save time and frustration compared to aftermarket parts that may not fit as intended.

6. **Maintenance-Friendly** The steel backing plate is designed to be easily removable for cleaning or replacement of the air filter, making routine maintenance simpler.

7. **Aesthetic Consistency** If you prefer a stock-like appearance, this part maintains the Harley-Davidson look while still allowing for performance upgrades (like the Linkert P757).

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1. **Cost** As an OEM or Harley-approved part, it may be more expensive than generic aftermarket alternatives. The price could be a deterrent for budget-conscious buyers, especially if they re open to non-Harley brands.

2. **Limited Performance Gains** While the backing plate itself is functional, it doesn t enhance performance beyond what the stock system already provides. The real performance boost comes from the Linkert P757 air cleaner, which is an additional purchase. If you re only buying this part to "complete" a setup, you may still need to invest in the air cleaner separately.

3. **Weight** Steel is heavier than some aftermarket materials (e.g., aluminum or plastic). While this isn t a significant drawback for most riders, it may contribute slightly to overall engine bay weight.

4. **Potential Overkill for Stock Riders** If you re not planning to upgrade your air cleaner system (e.g., sticking with the stock setup), this part may not offer any tangible benefits beyond being a replacement for a worn or damaged original.

5. **Availability and Lead Times** Harley-Davidson parts can sometimes have longer lead times, especially if ordered directly from the manufacturer or authorized dealers. This may delay your project if you re on a tight timeline.

6. **No Additional Features** Unlike some aftermarket alternatives, this part doesn t include extras like gaskets, seals, or mounting hardware. You may need to source these separately, adding to the cost and effort.

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The **Harley-Davidson 1421-42 J-Slot Steel Air Cleaner Backing Plate (1402-41 Linkert P757)** is a solid choice if you prioritize **quality, reliability, and compatibility** with your motorcycle s stock or upgraded air system. It s particularly worthwhile if you re already investing in the **Linkert P757** or need a direct replacement for a damaged part. The steel construction ensures longevity, and the OEM fit guarantees a secure installation.

However, if you re on a tight budget or only looking for minor upgrades, you might consider **aftermarket alternatives** that offer similar functionality at a lower cost. That said, for serious riders who value durability and brand consistency, this part is a **reliable and practical purchase**.

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- You re upgrading to the **Linkert P757** and need the matching backing plate.

- You ve damaged or lost your original backing plate and want a **direct OEM replacement**.

- You prioritize **long-term durability** and **seamless integration** with your bike s system.

- You re comfortable paying for **Harley-Davidson-quality** components.

- You re looking for **cost savings** and are open to aftermarket steel or plastic options.

- You re not upgrading your air cleaner and just need a basic replacement.

- You prefer **lighter materials** (e.g., aluminum) for weight reduction.

**Final Verdict:** This is a **smart investment** for those who want a **high-quality, long-lasting solution** for their Harley-Davidson s air cleaner system, especially when paired with the Linkert P757. For most riders, the benefits outweigh the drawbacks, making it a **recommended purchase**.

Details:

For Sale is: An OEM HD 7 1955-1964 Stainless Steel Air Cleaner for J-Slot # 1402-41 Pinhead, Service, UL WL Knucklehead. This has the Original Instruction Plate, It is pretty beat up but.

part #: 142142 prices

• $43.99-$250.00

specifications cyclevintagee:

• for makes: Harley
• brand: Harley-davidson
• mpn: 1421-42
• part type: Cleaner Plate
• compatible make: For Harley-davidson
• oe/oem part number: 1402-41
• compatible model: Servi-car
• country of origin: United States

shipping cyclevintagee:

• carrier: USPS
• class: Standard
• cost: $11.35
• transit: 4-8 Days
• service: USPS Ground Advantage
• type: Calculated

general cyclevintagee:

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

seller cyclevintagee:

• rating: 99.7%
• # reviews: 2368
• city: Watsonville, California

offer cyclevintagee:

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

returns cyclevintagee:

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

payments cyclevintagee:

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

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