KAWASAKI 39102-3501 Invader Rear Suspension Pivot Arm

( Manufacturer Part Number: 39102-3501 ), ( Part Type: Suspension Arm ), ( Country Of Origin: Japan )

Review KAWASAKI Snowmobile Invader Rear Suspension Pivot Arm fits INTRUDER 1978

The **Kawasaki 39102-3501 1978 Intruder/Invader Rear Suspension Pivot Arm** is a meticulously crafted, high-performance component designed specifically for Kawasaki s legendary 350cc Intruder and Invader models from the late 1970s, a time when these bikes were celebrated for their bold, customizable streetfighting spirit. This rear suspension pivot arm, forged from durable, heat-treated steel, serves as the critical link between the swingarm and the bike s rear suspension system, ensuring smooth, responsive handling while maintaining structural integrity under the demands of aggressive riding. Engineered to withstand the stresses of daily commuting, track days, or high-speed cruising, this part is a direct replacement for the original factory component, guaranteeing an exact fit with minimal modification required. The pivot arm s robust construction, featuring precision-machined bearing surfaces and reinforced mounting points, helps absorb road imperfections while preserving the bike s classic suspension geometry, which was pivotal in giving the Intruder and Invader their signature nimble yet stable ride. Whether restoring a vintage machine to its original glory or upgrading an existing setup for enhanced durability, this pivot arm is an essential piece for enthusiasts seeking to preserve or elevate the performance and reliability of their Kawasaki. Its compatibility with aftermarket suspension kits and custom builds further cements its value, making it a must-have for anyone looking to keep their 1978 Intruder or Invader running at its best for years to come.

### **Pros and Cons of Buying a 1978 Kawasaki Intruder/Invader Rear Suspension Pivot Arm (Part #39102-3501)**

1. **Authenticity and Vintage Appeal** This part is original to the 1978 Kawasaki Intruder/Invader, making it ideal for restoration or maintaining period-correct accuracy. It ensures the bike retains its original character rather than relying on aftermarket replacements.

2. **Reliability of OEM Components** Kawasaki s original parts are designed to fit perfectly, reducing the risk of compatibility issues that can arise with non-genuine aftermarket parts. This can prevent unnecessary modifications or adjustments.

3. **Durability (If in Good Condition)** If the part is in sound mechanical condition, it may still function reliably, especially if the bike has been well-maintained. Original suspension components from this era, while simple, can last decades with proper care.

4. **Easier Restoration** For collectors or enthusiasts restoring a classic bike, using an original part simplifies the process. It avoids the need to source or fabricate a replica, which can be time-consuming and costly.

5. **Potential for Resale Value** If the bike is being preserved or restored for resale, an original part like this can enhance its value in the vintage motorcycle market, particularly among purists.

6. **No Modification Needed** Unlike aftermarket parts that may require additional work (e.g., welding, machining), this part should fit directly into the frame without extra modifications, saving time and effort.

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1. **Age and Wear** At 45 years old, the part may show signs of fatigue, rust, or degradation. Even if it appears intact, the metal could be brittle or weakened over time, leading to failure during use.

2. **Limited Availability of Spare Parts** Kawasaki no longer produces this exact part, meaning sourcing replacements or repairs could be difficult. If the part fails, finding an identical replacement may require searching used markets or fabricating a custom part.

3. **Potential for Rust or Corrosion** Exposure to moisture and road salt over decades may have caused internal corrosion or pitting, compromising structural integrity. A thorough inspection is essential before use.

4. **Compatibility with Modern Modifications** If the bike has been modified (e.g., lowered, widened, or fitted with modern suspension), the original pivot arm may not align correctly, leading to handling issues or premature wear.

5. **Cost vs. Value** Depending on the market, this part may be expensive, especially if sourced from a reputable seller. For a bike that may not be in high demand, the cost could outweigh the benefits of authenticity.

6. **Risk of Hidden Damage** Without a professional inspection, there s a chance the part could have internal cracks, bent pivots, or other defects that aren t immediately visible. Using a damaged part could lead to suspension failure or frame damage.

7. **Maintenance Challenges** Original suspension components from this era often lack modern lubrication or protective coatings. The pivot arm may require frequent cleaning, lubrication, and inspection to prevent seizing or wear.

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### **Conclusion**

Buying an original 1978 Kawasaki Intruder/Invader rear suspension pivot arm (part #39102-3501) is a decision that hinges on your priorities. If you are restoring a classic bike for historical accuracy, authenticity, or resale value, the part is a worthwhile investment. However, if the bike is intended for regular use especially on rough roads or in harsh climates the risks of age-related failure and maintenance challenges may outweigh the benefits.

For most modern riders or those prioritizing safety and reliability, a high-quality aftermarket replacement (e.g., from a manufacturer like **Progressive Suspension, Pro Circuit, or a trusted custom fabricator**) is often a safer and more practical choice. Aftermarket parts are designed with modern materials, better tolerances, and warranties, reducing the risk of catastrophic failure.

If you proceed with the original part, **inspect it thoroughly** for rust, cracks, or play in the pivot. Consider having a professional mechanic assess its structural integrity before installation. Additionally, pair it with modern suspension components (e.g., updated shocks or bushings) to mitigate the limitations of the original design.

- **For restoration purists or collectors:** Proceed with caution. Purchase from a trusted seller (e.g., a reputable auction house, Kawasaki parts specialist, or a known vintage motorcycle parts dealer). Inspect or have it inspected before use.

- **For daily riding or performance use:** Opt for a modern aftermarket replacement. Brands like **Progressive Suspension** or **Pro Circuit** offer parts that maintain the classic look while improving durability and safety.

- **For budget-conscious buyers:** If the part is available at a reasonable price and in good condition, it may be a viable option but pair it with modern suspension components to extend its lifespan.

Ultimately, weigh the sentimental value of authenticity against the practical concerns of reliability and safety. In most cases, a balance between originality and modern upgrades will yield the best results.

Details:

KAWASAKI PART NUMBER 39102-3501.

part #: 391023501 price

• $24.99

specifications snowmobileshocksoi:

• for models: Intruder
• for makes: Kawasaki
• for years: 1978
• mpn: 39102-3501
• part type: Suspension Arm
• country of origin: Japan

payments snowmobileshocksoi:

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

offer snowmobileshocksoi:

• sold: 0
• quantity: 3
• options: Ship-to-home
• availability: In Stock
• started: April 30, 2026

general snowmobileshocksoi:

• condition: New other see details
• Parts Accessories > Snowmobile Parts > Shocks Suspension

shipping snowmobileshocksoi:

• transit: 2-6 Days
• carrier: USPS
• class: Standard, Expedited
• type: Calculated
• cost: $14.85
• service: USPS Ground Advantage, USPS Priority Mail, USPS Priority Mail Express

seller snowmobileshocksoi:

• rating: 99.9%
• city: Hinckley, Minnesota
• # reviews: 15240

returns snowmobileshocksoi:

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

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