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  3. SBT 25-211

SBT 25-211 Wrist Pin Bearing Ultra 13303-3704 150

fits model: Stx. make: Yamaha, Kawasaki.

13303-3704 Sbt 25-211 Yamaha Wrist Pin Bearing Kawasaki Ultra 150 Stx-r

( Brand: Sbt ), ( Manufacturer Part Number: 25-211 ), ( Part Type: Bearing Pin ), ( Country Of Origin: United States )

Review SBT Yamaha Wrist Pin Bearing Kawasaki Ultra 150 Stx r fits STX

The **Yamaha SBT 25-211 Wrist Pin Bearing (Part Number: 13303-3704)** is a precision-engineered component designed specifically for high-performance applications in the Kawasaki Ultra 150 STX-R, ensuring optimal performance, durability, and reliability under demanding riding conditions. This bearing is a critical part of the motorcycle s wrist pin assembly, which connects the connecting rod to the piston within the engine, allowing for smooth reciprocating motion while withstanding extreme forces generated during acceleration, deceleration, and high-speed operation. Crafted from high-grade steel and treated with advanced heat and surface hardening processes, this bearing features a robust inner and outer raceway, along with a precision-machined cage that maintains consistent lubrication and minimizes friction, even under heavy loads. The **13303-3704** designation ensures compatibility with the Kawasaki Ultra 150 STX-R s engine specifications, providing a perfect fit for the wrist pin assembly while maintaining the motorcycle s original performance characteristics. Whether used for routine maintenance, engine rebuilds, or performance upgrades, this bearing delivers exceptional durability, reducing wear on adjacent components and extending the lifespan of the engine. Its seamless integration with the motorcycle s drivetrain ensures that riders can enjoy a smoother, more responsive ride while benefiting from the enhanced reliability of a high-quality, OEM-replacement part.

### **Pros and Cons of buying a SBT 25-211 Yamaha Wrist Pin Bearing (13303-3704) for a Kawasaki Ultra 150 STX-R**

#### **Pros:**

1. **Compatibility** The SBT 25-211 is specifically designed to fit the Kawasaki Ultra 150 STX-R s wrist pin bearing application (part number 13303-3704). This ensures a direct replacement without modification, reducing installation hassles.

2. **Durability** SBT (Sealed Bearing Technology) bearings are known for their robust construction, often featuring high-quality seals and hardened steel races. This can improve longevity compared to standard OEM bearings, especially in high-stress applications.

3. **Sealed Design** The sealed construction helps prevent dirt, moisture, and debris from entering the bearing, which is crucial for maintaining smooth operation in off-road or dusty conditions.

4. **Performance Benefits** A well-lubricated, high-quality bearing reduces friction, which can improve engine efficiency and reduce wear on connected components like the crankshaft and connecting rod.

5. **Warranty and Reliability** SBT bearings typically come with manufacturer warranties, offering some assurance against premature failure. Many riders report reliable performance in similar applications.

6. **Ease of Installation** Since it s a direct replacement, swapping the bearing is straightforward, requiring only basic tools and minimal disassembly of the engine.

7. **Cost-Effective Upgrade** While slightly more expensive than OEM bearings, the potential for extended service life and reduced maintenance costs can make it a cost-effective choice over time.

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#### **Cons:**

1. **Price Premium** SBT bearings are generally more expensive than standard OEM or aftermarket alternatives. For budget-conscious buyers, this may be a significant drawback, especially if the OEM bearing is still in good condition.

2. **Limited Availability** Depending on the region, SBT parts may not be as widely stocked as more common aftermarket brands. This could require ordering online or waiting for delivery.

3. **Overkill for Light Use** If the Kawasaki Ultra 150 STX-R is primarily used for casual riding with minimal stress on the engine, the performance gains of an SBT bearing may be negligible. For such cases, an OEM or budget aftermarket bearing might suffice.

4. **Potential for Over-Tightening** High-quality bearings can sometimes be more sensitive to improper installation, such as overtightening during assembly. This risk exists with any bearing but may be more critical with premium parts.

5. **Mixed Reviews on Longevity** While many users report excellent performance, some anecdotal reports suggest that SBT bearings may not always outlast OEM bearings in extreme conditions (e.g., heavy off-roading or aggressive riding). Results can vary based on maintenance and riding habits.

6. **No Significant Power Gain** Unlike some high-performance upgrades, a wrist pin bearing replacement does not directly improve horsepower or throttle response. The benefits are primarily in reliability and reduced wear.

7. **Compatibility Verification Needed** While the SBT 25-211 is advertised for the Kawasaki Ultra 150 STX-R, it s always wise to double-check dimensions and part numbers to ensure a perfect fit, especially if the bike has been modified or has unique engine variations.

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### **Conclusion and Recommendation**

The **SBT 25-211 Yamaha wrist pin bearing (13303-3704)** is a solid choice for riders looking to upgrade their Kawasaki Ultra 150 STX-R s wrist pin bearing, particularly if they prioritize durability, reduced maintenance, and a sealed design to protect against dirt and moisture. The bearing s compatibility, ease of installation, and potential for extended service life make it a worthwhile investment for those who plan to use their bike frequently or in demanding conditions.

However, if budget is a concern or the bike is used sporadically, an **OEM replacement bearing** or a **reputable aftermarket alternative** (such as those from brands like **SKF, NTN, or JUN**) may offer comparable performance at a lower cost. The decision ultimately depends on your riding habits, maintenance routine, and willingness to pay for premium components.

**Final Recommendation:** - **Buy the SBT 25-211 if:**

- You want a high-quality, sealed bearing for long-term reliability.

- You ride the Ultra 150 STX-R frequently or in dusty/rough conditions.

- You re willing to pay a premium for reduced maintenance and potential longevity.

- **Consider alternatives if:**

- You re on a tight budget and the OEM bearing is still functional.

- The bike is used infrequently and doesn t require extreme durability.

- You prefer to compare other brands (e.g., NTN or SKF) for similar performance at a lower price.

For most riders who value reliability and are not overly concerned about cost, the **SBT 25-211 is a strong recommendation**. However, always verify compatibility and consider your specific riding conditions before purchasing.

Details:

Yamaha 2022 VX-C. Yamaha 2023 VX-C. Wrist Pin Bearing compatible with 13303-3704 Kawasaki Ultra 150, STX-R: Brand SBT, Part Number 25-211. Compatible With: Yamaha 2021 VX-C.

part #: 25211 prices

  • $19.20-$21.99

specifications traiparboa:

  • for models: Stx
  • for makes: Yamaha, Kawasaki
  • brand: Sbt
  • mpn: 25-211
  • part type: Bearing Pin
  • country of origin: United States

returns traiparboa:

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

offer traiparboa:

  • quantity: 5
  • sold: 0
  • started: May 26, 2026
  • options: Ship-to-home
  • availability: In Stock

general traiparboa:

  • condition: New
  • Parts Accessories > Boat Parts > Trailer Parts

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  • # reviews: 705
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shipping traiparboa:

  • cost: $12.50
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  • type: Fixed
for models: stx, for makes: yamaha, kawasaki, part type: bearing pin, country of origin: united states,
category: boat parts > trailer parts, sku: 5507731034871723,
Sbt 25-211 Is Similar To:
traiparboa logo
3 offers $19.20–$21.99 USD
  • New. Offer #1 priced at $19.20 + $7.99 shipping estimate = $27.19* total. SBT Wrist Pin Bearing compatible with Kawasaki Ultra 150, STX-R.+$7.99 shipping
  • New. Offer #2 priced at $19.20 + $12.50 shipping estimate = $31.70* total. Yamaha 2024 VX-C. Wrist Pin Bearing compatible with Kawasaki Ultra 150, STX-R.+$12.50 shipping
  • New. Offer #3 priced at $21.99 + $6.30 shipping estimate = $28.29* total. SBT caged wrist pin bearing.+$6.30 shipping

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