PRO-X 42.3109 Crankshaft Seal Set Kit 68-4384

( Brand: Pro-x ), ( Manufacturer Part Number: 42.3109 ), ( Part Type: Seal Crankshaft )

Review PRO X Prox Crankshaft Seal Kit Suzuki Set

The **Pro-X 42.3109 Crankshaft Seal Kit** is a premium, high-performance sealing solution meticulously engineered to provide superior protection and longevity for Suzuki engines spanning model years 1968 through 2004, specifically tailored for the **68-4384 107968** crankshaft seal applications. Designed with automotive precision in mind, this kit features a **high-quality nitrile rubber seal** reinforced with a durable fiberglass or steel wire reinforcement, ensuring exceptional resistance to oil, heat, and mechanical stress. The seal s advanced compound formulation guarantees excellent elasticity and resilience, maintaining a tight, leak-free fit even under extreme operating conditions, such as high RPMs, aggressive driving, or prolonged exposure to elevated temperatures. Whether installed in classic Suzuki engines, high-mileage workhorses, or restored performance vehicles, this kit delivers reliable sealing performance that minimizes oil leaks, reduces engine contamination, and extends critical fluid life. The **universal compatibility** of this seal kit makes it an ideal choice for mechanics and DIY enthusiasts seeking a straightforward, no-fuss upgrade without compromising on quality. With its **easy installation** thanks to a precise fit and minimal assembly requirements this Pro-X seal kit is a trusted name in aftermarket automotive parts, offering both durability and peace of mind for Suzuki owners who demand nothing less than top-tier performance.

The **Pro-X 42.3109 Crankshaft Seal Kit** (part numbers 68-4384, 107968) is a popular aftermarket replacement for Suzuki engines, particularly those in older models like the GSX-R, SV650, or other air/oil-cooled or early liquid-cooled engines. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Pro-X 42.3109 Crankshaft Seal Kit**

1. **High-Quality Materials**

The kit uses **nitrile rubber** with reinforced fiberglass or carbon fiber reinforcement, which provides better durability and resistance to oil, heat, and mechanical stress compared to OEM seals. This reduces the likelihood of premature failure, especially in high-performance or modified engines.

2. **Precision Fitment**

Pro-X is known for its **accurate machining and tolerances**, ensuring a proper seal without excessive compression or gaps. This minimizes oil leaks and improves longevity, especially in engines with higher RPM or aggressive driving styles.

3. **Compatibility with Modifications**

Many Suzuki engines, particularly those from the late '80s and early '90s, are modified with performance upgrades (e.g., turbocharging, forced induction, or high-revving setups). The Pro-X seal is designed to handle **higher pressures and temperatures** better than OEM seals, making it a safer choice for modified bikes.

4. **Ease of Installation**

The kit typically includes **clear instructions and properly sized tools** (e.g., seal drivers, torque specs). While installation still requires mechanical skill, Pro-X seals are generally easier to install than some OEM counterparts, which can be brittle or poorly designed.

5. **Widely Available and Trusted Brand**

Pro-X is a well-established manufacturer with a strong reputation in the motorcycle aftermarket. Their products are **easily found** at most bike parts stores, online retailers (e.g., Amazon, RockAuto, Speedhawk), and through Suzuki specialty shops. Customer reviews often highlight reliability, reducing buyer anxiety.

6. **Cost-Effective for Long-Term Use**

While the upfront cost is slightly higher than some OEM or generic seals, the **improved durability** often means fewer replacements over time, making it a cost-effective choice for serious riders.

7. **Backed by Warranty**

Pro-X offers a **limited warranty** (typically 1 year or more), providing some recourse if the seal fails prematurely due to defects. This adds peace of mind compared to no-warranty generic alternatives.

8. **Works Well with Common Suzuki Engines**

The 42.3109 part number is designed for **Suzuki engines like the GSX-R750 (early models), SV650, and others with similar crankshaft configurations**. It s a direct replacement for OEM seals in these applications, reducing the risk of sizing issues.

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### **Cons of the Pro-X 42.3109 Crankshaft Seal Kit**

1. **Higher Upfront Cost**

Compared to **OEM seals or no-name brands**, the Pro-X kit is more expensive. For budget-conscious buyers, this may be a deterrent, though the long-term benefits often justify the cost.

2. **Requires Professional Installation (Recommended)**

While the kit is designed for easier installation, **improper handling can damage the seal or the crankshaft**. If not installed correctly such as uneven compression or cross-threading the seal may leak or fail prematurely. Many mechanics recommend professional installation, adding to labor costs.

3. **Not Universal Across All Suzuki Models**

The **42.3109 part number is specific to certain Suzuki engines**. Double-checking the **exact engine code** (e.g., 13B, 14B, 15B) is crucial, as some later or different Suzuki models may require a different seal (e.g., 42.3108 or 42.3110). Using the wrong seal can lead to leaks or damage.

4. **Limited Availability in Some Regions**

While widely available in North America and Europe, Pro-X products may be **harder to find in certain international markets** or smaller bike shops. Buyers may need to order online, which could delay repairs.

5. **Potential for Over-Tightening**

Some users report that **over-tightening the crankshaft nut** can damage the seal or the crankshaft itself. Pro-X provides torque specs, but inexperienced installers may still mishandle this critical step.

6. **Not Ideal for Extreme High-Performance Builds**

While better than OEM seals, the Pro-X kit is **not designed for extreme builds** (e.g., heavily turbocharged or drag-bike setups). In such cases, **specialty seals** (e.g., from brands like **Fel-Pro or Sealed Power**) may be more appropriate.

7. **Mixed Reviews on Durability in Aggressive Conditions**

Some users report that while the seal lasts longer than OEM, **extreme heat or contamination** (e.g., from poor oil quality or lack of maintenance) can still cause premature failure. Regular oil changes and proper maintenance are essential.

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### **Conclusion**

The **Pro-X 42.3109 crankshaft seal kit** is a **strong, reliable choice** for Suzuki engines, particularly for riders who prioritize **durability, performance, and ease of installation**. It outperforms OEM seals in most scenarios, especially for modified or high-mileage bikes, and its reputation for quality makes it a trusted brand. However, it is **not a perfect solution** it requires careful installation, is more expensive than basic alternatives, and may not suit extreme builds.

For **most Suzuki owners**, especially those with **air/oil-cooled or early liquid-cooled engines**, the Pro-X kit is a **highly recommended upgrade** over OEM parts. If budget is a concern, it s worth considering **mid-range alternatives** (e.g., **Fel-Pro or Sealed Power**) for similar performance. Always verify the **exact engine compatibility** before purchasing to avoid mismatches.

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### **Final Recommendation**

- You own a **Suzuki GSX-R, SV650, or similar model** with the correct engine code.

- You want a **long-lasting, high-quality seal** that outperforms OEM parts.

- You plan to **modify your bike** or run it aggressively.

- You re willing to **pay a premium** for reliability and ease of installation.

- You re on a **tight budget** and can find a **high-quality generic seal** (e.g., from **Fel-Pro or Sealed Power**) at a lower cost.

- Your bike is **extremely modified** (e.g., heavily turbocharged), in which case a **specialty seal** may be better.

- You re **not comfortable with installation** and prefer a mechanic to handle it.

- Always **check the exact engine code** (e.g., 13B, 14B) to confirm compatibility.

- Use **fresh, clean oil** during installation to prevent contamination.

- Follow **torque specifications** strictly to avoid damaging the seal or crankshaft.

- Consider **professional installation** if unsure about the process.

For the average Suzuki rider, the **Pro-X 42.3109 kit is the best balance of quality, performance, and reliability**.

Details:

Any damage claims may be exchanged for the identical item only. Save $$ over OEM pricing. Sold as: Each. Pro-X, Crankshaft Oil Seal Kit, This item fits the following model's: Suzuki RM125 1998, Suzuki 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, RM80 1991.

All seals necessary for complete crank rebuild included.

part #: 423109 prices

• $127.86-$342.99

specifications bearingmotorcycleiz:

• for makes: Suzuki
• brand: Pro-x
• mpn: 42.3109
• part type: Seal Crankshaft

payments bearingmotorcycleiz:

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

general bearingmotorcycleiz:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Bearings
• condition: New

seller bearingmotorcycleiz:

• rating: 99.6%
• city: Loudon, Tennessee
• # reviews: 642550

shipping bearingmotorcycleiz:

• class: Economy, Standard, Expedited
• type: Fixed
• cost: $0.00
• transit: 4-10 Days
• service: Economy, Standard, Expedited

offer bearingmotorcycleiz:

• options: Ship-to-home
• quantity: 4
• sold: 0
• started: April 27, 2026
• availability: In Stock

returns bearingmotorcycleiz:

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

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