1. Motorcycle Engine Bearings For Sale
  2. sku: 11883659344290813
  3. WISECO MN/WWT5

WISECO MN-WWT5 Top End Bearing Egs Engine Pistons MN/WWT5

fits model: Gt, 200. make: Ktm. year: 1998–1999.

Wwt5 Wiseco Mn/wwt5 Top End Bearing For 1998-1999 Ktm 200 Egs - Engine Pistons Gt

( Brand: Wiseco ), ( Manufacturer Part Number: MN/WWT5 ), ( Type: Top End Bearing ), ( Compatible Year: 1999 1998 ), ( Compatible Model: 200 Egs ), ( Bundle Description: 1 Pc Genuine Wiseco Top End Bearing ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review WISECO Mn/wwt5 Top End Bearing Ktm Egs Engine Pistons fits GT 200 1998–1999

The **Wisco MN/WWT5 Top-End Bearing Kit** is a premium, high-performance replacement solution specifically engineered for the **1998 1999 KTM 200 EGS engine**, delivering superior strength, durability, and reliability for both stock and modified applications. Designed to meet the demanding requirements of high-revving, high-stress two-stroke engines, this top-end bearing kit features **high-grade, precision-machined components** that ensure optimal oil distribution, reduced friction, and extended bearing life. The **Wisco MN series** is renowned for its **superior wear resistance** and **thermal stability**, making it an ideal choice for riders pushing their engines to the limit whether through aggressive tuning, racing, or heavy-duty use. Each bearing in this kit is **carefully manufactured** from **high-quality aluminum alloy** with a **thin, durable oil-impregnated lining**, which enhances lubrication and minimizes metal-to-metal contact, reducing the risk of catastrophic failure under extreme conditions. The **WWT5 designation** indicates a **thicker, reinforced design**, providing enhanced load-bearing capacity and better resistance to oil starvation, a critical factor in high-performance two-stroke engines where oil flow can be inconsistent. Whether installed in a **stock 200 EGS** or a **highly modified race engine**, this bearing kit ensures **consistent power delivery, smoother operation, and prolonged engine longevity**, making it a must-have upgrade for serious riders who demand nothing less than peak performance. Built to withstand the rigors of aggressive riding, this kit is a direct replacement for OEM components, ensuring a perfect fit and seamless integration with the engine s existing architecture. With **Wisco s reputation for precision engineering and reliability**, this top-end bearing kit is the ideal choice for those seeking a **durable, high-performance solution** that elevates their KTM 200 EGS to the next level of efficiency and dependability.

Buying high-end bearings like the **Wisco MN/WWT5 top-end bearing kit** for a 1998 1999 KTM 200 E-GS engine (specifically for pistons and connecting rods) offers several advantages but also comes with trade-offs. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Using Wiseco MN/WWT5 Bearings**

1. **Superior Durability and Load Capacity**

Wiseco s top-end bearings are designed with advanced materials and precision engineering, including **high-strength steel backing and specialized coatings** (such as the **WWT5 s wear-resistant top layer**). This enhances their ability to withstand the high stresses of a 200 E-GS engine, particularly under aggressive riding conditions, forced induction, or high-RPM scenarios. The **MN/WWT5 series** is often recommended for performance builds or engines running modified camshafts, larger valves, or turbocharging.

2. **Reduced Wear and Extended Engine Life**

The **low-friction coatings** (e.g., Wiseco s proprietary **WWT5 treatment**) minimize metal-to-metal contact, reducing wear on both the bearings and journal surfaces. This can lead to longer bearing life and delayed engine wear, which is critical for a high-revving 200 E-GS engine where piston slap and rod bearing wear are common failure points.

3. **Compatibility with Modified Engines**

The 1998 1999 KTM 200 E-GS is a **highly tunable engine**, and aftermarket modifications (e.g., bigger valves, aggressive cams, or forced induction) increase stress on the top end. Wiseco s bearings are **engineered for performance applications**, making them a safer choice than OEM bearings when pushing the engine beyond stock parameters.

4. **Easier Installation and Fit**

Wiseco bearings are **pre-lubed and precisely machined** to fit stock dimensions, reducing the risk of installation errors. They also often include **clearance guides or installation instructions**, which can be helpful for DIYers working on a 200 E-GS engine for the first time.

5. **Warranty and Reliability**

Wiseco is a well-established brand with a reputation for **consistent quality**. Their bearings come with warranties (typically 1 2 years), and they are widely used in racing and high-performance circles, suggesting reliability in demanding applications.

6. **Potential for Improved Performance**

While the primary benefit is durability, some users report **smoother operation** with Wiseco bearings due to reduced friction, which can indirectly improve power delivery in a naturally aspirated or mildly modified 200 E-GS.

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### **Cons of Using Wiseco MN/WWT5 Bearings**

1. **Higher Cost Compared to OEM**

Wiseco bearings are **significantly more expensive** than stock KTM bearings. For a 200 E-GS, where the engine is already a budget-friendly platform, the cost difference (often **3 5x more**) may not be justified unless you re planning extensive modifications or aggressive riding.

2. **Overkill for Stock or Mildly Modified Engines**

If the engine is **stock or only lightly modified** (e.g., minor cam upgrades, slight porting), the **additional strength of Wiseco bearings may not be necessary**. Stock bearings are adequate for daily riding and basic tuning, and upgrading to Wiseco could be seen as **unnecessary spending**.

3. **Potential for Over-Specification**

Some mechanics argue that **stock bearings are fine for 90% of 200 E-GS owners**, and upgrading to Wiseco without a clear performance goal (e.g., forced induction, aggressive daily driving, or racing) is **premature**. The extra cost may not translate to noticeable benefits unless the engine is stressed.

4. **Installation Complexity**

While Wiseco bearings are easier to install than some aftermarket options, **removing old bearings and ensuring proper cleaning** is still critical. A poorly installed bearing kit (e.g., improper gap, debris in the oil passages) can lead to **premature failure**, negating the benefits.

5. **Limited Long-Term Data on 200 E-GS Specifics**

Wiseco bearings are widely used in **modern 4-stroke engines (e.g., dirt bikes, ATVs, supermotos)**, but the **1998 1999 KTM 200 E-GS is an older design** with different oil flow and cooling characteristics. While the bearings themselves are robust, **real-world feedback on their performance in this specific engine is limited** compared to more modern applications.

6. **Risk of Over-Tightening**

Wiseco bearings are **stronger than stock**, which can lead to **over-tightening risks** if the installer isn t careful. Some users report **stripped threads or bent rods** if they assume the bearings can handle excessive torque. Always follow **manufacturer torque specs** (or KTM s original specs) to avoid damage.

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### **Conclusion**

The decision to use **Wisco MN/WWT5 bearings** on a 1998 1999 KTM 200 E-GS depends on your **intended use, modification plans, and budget**. Here s how to evaluate:

- **If the engine is stock or lightly modified**, Wiseco bearings are **not strictly necessary** stock bearings will suffice for daily riding, and the cost difference is unjustified.

- **If the engine is heavily modified (forced induction, aggressive cams, big valves, or high-mileage rebuild)**, Wiseco s **superior durability and wear resistance** make them a **strong upgrade** worth the investment.

- **If you re racing or pushing the engine hard**, Wiseco bearings provide **peace of mind** and reduce the risk of catastrophic failure from bearing wear.

- **If you re on a tight budget**, consider **high-quality OEM replacements** (e.g., from a reputable rebuild shop) or **mid-range aftermarket bearings** (e.g., **Fel-Pro or Moroso**) before committing to Wiseco.

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### **Final Recommendation**

For the **average 200 E-GS owner** who rides the bike stock or with minor modifications, **stock bearings or a reputable OEM replacement kit** is sufficient. The **Wisco MN/WWT5 bearings are best reserved for:**

- **Performance builds** (turbocharged, supercharged, or heavily modified engines).

- **High-mileage rebuilds** where you want maximum longevity.

- **Racing or aggressive daily use** where reliability is critical.

If you **do decide to upgrade**, ensure:

1. **Proper installation** (clean oil passages, correct gap, proper torque).

2. **Compatibility** (confirm the Wiseco part numbers match your engine s specifications).

3. **Budget justification** (weigh the cost against the expected benefits).

For most **stock or mildly modified 200 E-GS engines**, **stock bearings or a budget-friendly aftermarket kit** will provide adequate performance without the premium price of Wiseco. However, if you re **seriously modifying the engine or pushing it hard**, Wiseco s **MN/WWT5 bearings are a smart, high-end choice** that will pay off in durability and reliability.

Details:

Wiseco Top End Bearing for 1998 - 1999 KTM 200 EGS - Engine Pistons Gt: Status: In Stock.

specifications bearingmotorcycleiz:

  • for models: Gt, 200
  • for makes: Ktm
  • for years: 1998-1999
  • brand: Wiseco
  • mpn: Mn/wwt5
  • type: Top End Bearing
  • compatible year: 1999 1998
  • compatible model: 200 Egs
  • bundle description: 1 Pc Genuine Wiseco Top End Bearing
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

seller bearingmotorcycleiz:

  • city: Multiple warehouses
  • rating: 99.0%
  • # reviews: 2007 6

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

general bearingmotorcycleiz:

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

shipping bearingmotorcycleiz:

  • service: Standard
  • type: Fixed
  • class: Standard
  • cost: $0.00
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offer bearingmotorcycleiz:

  • sold: 0
  • availability: In Stock
  • started: April 1, 2026
  • quantity: 1
  • options: Ship-to-home
for models: gt, 200, for makes: ktm, for years: 1998-1999, type: top end bearing, compatible year: 1999 1998, compatible model: 200 egs, bundle description: 1 pc genuine wiseco top end bearing, core charge: free no core charge, fitment type: direct replacement,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > engine bearings, sku: 11883659344290813,
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