HONDA 91001-HP1-671 Left Crankshaft Bearing 04/05

( Manufacturer Part Number: 91001-HP1-671 ), ( Part Type: Bearing Crankshaft ), ( Manufacturer Warranty: No Warranty ), ( Country Of Origin: Japan ), ( California Prop 65 Warning: Warning )

Review HONDA Oem Left Crankshaft Main Bearing 04/05 fits TRX450R

The **Honda 91001-HP1-671 Left Crankshaft Bearing** is a precision-engineered, high-performance component specifically designed for the **2004 and 2005 Honda TRX450R**, a rugged and versatile off-road motorcycle known for its durability and off-road capabilities. This bearing is a critical part of the engine s crankshaft assembly, ensuring smooth and reliable operation by reducing friction between the crankshaft and the engine block. Crafted from **high-grade steel** and treated with advanced **bearing alloy coatings**, this component is engineered to withstand the extreme stresses of off-road riding, including heavy loads, abrupt torque shifts, and prolonged exposure to dust, dirt, and moisture. The **71mm outer diameter** and **35mm inner diameter** dimensions are meticulously matched to the TRX450R s crankshaft journal, providing an optimal fit that minimizes play while maximizing load-bearing capacity. Unlike generic or aftermarket alternatives, this bearing is **OEM-certified**, meaning it meets Honda s exacting standards for quality, durability, and compatibility, ensuring seamless integration with the original engine components. Whether used for routine maintenance, performance upgrades, or as a direct replacement for a worn-out bearing, this part is built to restore peak engine efficiency, extend component lifespan, and maintain the TRX450R s legendary reliability in both on-road and off-road conditions. Proper installation requires careful alignment and lubrication, but the bearing s robust construction and precision engineering make it a dependable choice for riders who demand nothing less than Honda s legendary engineering excellence.

### **Pros and Cons of buying a Honda 91001-HP1-671 Left Crankshaft Bearing (for 2004/2005 TRX450R)**

1. **OEM Quality** This is a genuine Honda part, meaning it meets the manufacturer s exact specifications for fit, function, and durability. OEM components are designed to match the original build quality, reducing the risk of premature failure or compatibility issues.

2. **Reliability** Honda s reputation for durability extends to its bearings. The 91001-HP1-671 is engineered to handle the stress of a 450cc ATV engine, particularly in the crankshaft area, which is critical for smooth operation and longevity.

3. **Ease of Installation** As an original equipment part, it should fit seamlessly into the engine without requiring modifications. The bearing is designed to work with the stock crankshaft and related components, simplifying the replacement process.

4. **Compatibility** This specific part is confirmed for the 2004 and 2005 TRX450R models. Avoiding aftermarket parts with questionable compatibility reduces the risk of damage to other engine components during installation.

5. **Warranty Coverage** Purchasing from an authorized dealer or Honda-approved supplier may include a warranty, providing peace of mind in case of defects. This is less common with third-party parts.

6. **Performance Consistency** Unlike aftermarket bearings that may vary in quality, an OEM part ensures consistent performance. This is particularly important for the crankshaft bearing, which directly impacts engine smoothness and power delivery.

7. **Resale Value** Using OEM parts can make it easier to sell or trade in the vehicle later, as buyers often prefer machines with original or high-quality aftermarket components.

---

1. **Higher Cost** OEM parts are typically more expensive than aftermarket alternatives. The 91001-HP1-671 may cost significantly more than a generic bearing, which could be a deterrent for budget-conscious buyers.

2. **Limited Availability** Genuine Honda parts may not be as widely stocked as aftermarket options, especially in smaller repair shops or online marketplaces. This could require ordering from a specialized supplier, potentially increasing lead time.

3. **Potential Overkill for Some Users** If the bearing failure is due to a minor issue (e.g., lack of maintenance or a one-time stress event), an OEM replacement might be more than necessary. In such cases, a high-quality aftermarket bearing could suffice at a lower cost.

4. **No Upgrades** Unlike aftermarket bearings, this part does not offer performance upgrades (e.g., reduced friction, increased load capacity, or improved durability). If the goal is to enhance engine performance, an aftermarket bearing might be more appealing.

5. **Depreciation** Like all vehicles, the TRX450R loses value over time. Using OEM parts during repairs or maintenance may not directly impact depreciation, but it doesn t provide any advantage in this regard either.

6. **Installation Complexity** While the bearing itself is straightforward, replacing it may require disassembling parts of the engine. If the buyer lacks mechanical experience, this could lead to additional labor costs or frustration.

---

The **Honda 91001-HP1-671 left crankshaft bearing** is an excellent choice for owners of the 2004/2005 TRX450R who prioritize **reliability, compatibility, and long-term durability**. It is the safest option for ensuring the engine runs smoothly and reducing the risk of further damage. However, the **higher cost** and **limited availability** may make it less appealing for those on a tight budget or those who prefer aftermarket alternatives.

If the primary concern is **cost savings** and the bearing is not critically failing (e.g., no metal shavings in the oil or excessive play), a **high-quality aftermarket bearing** (e.g., from brands like **Fel-Pro, Sealed Power, or NSK**) could be a viable substitute without sacrificing performance. These aftermarket options often come with warranties and may offer better value for money.

For most serious riders or those who value **original equipment standards**, the OEM bearing is the **best recommendation**. However, if budget is a constraint and the bearing is not severely worn, an aftermarket equivalent could be a practical compromise.

---

- You want the most reliable and longest-lasting solution.

- You are willing to pay the premium for an OEM part.

- You plan to keep the ATV for an extended period and want to avoid future issues.

- You are on a tight budget and the bearing is not critically damaged.

- You trust a reputable aftermarket brand with a strong warranty.

- You are comfortable with the slight risk of potential compatibility or longevity concerns.

For the average TRX450R owner, **the OEM bearing is the safest and most recommended choice**, especially if the engine is a high-mileage or heavily used machine.

Details:

Made in Japan by Honda, this bearing is a genuine OEM product that ensures perfect fit and reliable performance. The Honda OEM 91001-HP1-671 Left Crankshaft Main Bearing is a high-quality engine part designed specifically for the 04/05 TRX450R model.

part #: 91001hp1671 prices

• $38.90-$369.95

specifications bearingmotorcycleiz:

• for models: Trx450r
• for makes: Honda
• mpn: 91001-hp1-671
• part type: Bearing Crankshaft
• manufacturer warranty: No Warranty
• country of origin: Japan
• california prop 65 warning: Warning

general bearingmotorcycleiz:

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

returns bearingmotorcycleiz:

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

seller bearingmotorcycleiz:

• city: Newton, Kansas
• # reviews: 2996
• rating: 99.8%

shipping bearingmotorcycleiz:

• carrier: USPS
• service: USPS Ground Advantage
• cost: $2.00
• transit: 3-9 Days
• class: Standard
• type: Fixed

offer bearingmotorcycleiz:

• started: March 2, 2026
• quantity: 1
• availability: In Stock
• sold: 0
• best offers: True
• options: Ship-to-home

payments bearingmotorcycleiz:

• wallet: Apple-pay
• other
• credit card: Mastercard

Honda 91001-HP1-671 Is Similar To:

• 0215-0114 Moose Rear Wheel Bearing Kit Honda Trx (35.1% similar) ...(March 27th, 2019)
• 06910-hm4-850 Honda Genuine Nos Bearing (34.3% similar) Be sure to check fitment prior purchase ensure you get the part need.this is a genuine honda nos part...(September 4th, 2017)
• Trx700 2009 Cylinder Honda Trx700xx Trx Oem 2008 Standard Bore 09310394 700 (32.6% similar) This is a standard bore cylinder in perfect condition. This cylinder had less than a few hundred miles on it. Switched out for a big bore. Still see the cross hatch from the factory. Cylinder from a 2009 TRX700. Like new condition...(February 18th, 2015)
• 1111111 Honda Cr Wrist Pin With Needle Bearing (37.5% similar) Shipping important: flat rate and free service is for the lower 48 states only. Unless stated otherwise in the , all parts listed are used and therefore sold as is condition with no warranty of any kind. It helps to get part numbers and cross reference them with sites such as . I have several parts ...(October 1st, 2018)
• 11361-ha2-000 Honda Genuine Nos Holder Balancer Bearing (29.8% similar) This is a genuine honda nos part...(August 10th, 2018)
• 13111-kv3-771 Honda Bearing (28% similar) Honda bearing, 13111-KV3-771...(July 12th, 2018)
• 13211-035-000 Honda Genuine Nos Bearing (34.3% similar) This is a genuine honda nos part. Be sure to check fitment prior purchase ensure you get the part need...(September 4th, 2017)
• 13213-ha5-003 Honda Genuine Nos Bearing (34.3% similar) This is a genuine honda nos part. Be sure to check fitment prior purchase ensure you get the part need...(September 4th, 2017)
• 13214-mj0-013 Honda Genuine Nos Bearing Conn (34.5% similar) This is a genuine honda nos part. Be sure to check fitment prior purchase ensure you get the part need...(May 19th, 2018)
• 13215-300-013 Honda Genuine Nos Bearing (34.3% similar) This is a genuine honda nos part. Be sure to check fitment prior purchase ensure you get the part need...(September 4th, 2017)
• 13215-413-005 Honda Oem Connecting Rod Bearing (41.1% similar) ...(July 21st, 2018)