YAMAHA 1LX-12450-01-00 Water Pump Impeller Shaft

( Manufacturer Part Number: 1LX-12450-01-00 ), ( Part Type: Pump Impeller Shaft ), ( Machine Type: Off-road Motorcycle ), ( Vintage Part: Yes ), ( Universal Fitment: No ), ( Compatible Year: 1986, 1987 ), ( Country Of Origin: Japan )

Review YAMAHA Water Pump Impeller Shaft Used Oe Pn fits YZ125 1987

The **Yamaha 1LX-12450-01-00 YZ125 Water Pump Impeller Shaft (1987 Model)** is a precision-engineered component designed specifically for Yamaha s iconic YZ125 dirt bike, ensuring optimal cooling performance and longevity of the engine s critical internal components. This impeller shaft is a vital part of the bike s water-cooling system, where it plays a crucial role in circulating coolant through the engine s jacket, preventing overheating during high-performance riding or extended use. Crafted from high-quality, durable materials, this shaft is built to withstand the demanding conditions of off-road racing and recreational riding, delivering reliable performance season after season.

The impeller shaft features a meticulously machined design, incorporating a balanced impeller that efficiently draws coolant from the radiator and pumps it through the engine s cooling passages. Its precise fitment ensures minimal clearance, reducing the risk of leaks or air pockets that could compromise cooling efficiency. For the **1987 YZ125**, this part is a direct replacement for the original equipment, maintaining the bike s factory specifications while offering enhanced durability compared to aftermarket alternatives. Whether you're restoring a classic YZ125 to its original glory or upgrading an existing setup for improved reliability, this impeller shaft is an essential component that contributes to the bike s overall cooling efficiency and engine protection.

Installation is straightforward, requiring only basic tools and a careful approach to ensure proper alignment and sealing. The shaft s design is compatible with Yamaha s water pump assembly, making it an ideal choice for riders who prioritize performance and longevity without sacrificing authenticity. By incorporating this high-quality impeller shaft into your bike s cooling system, you can trust that your YZ125 will maintain optimal operating temperatures, reducing wear on critical components like the cylinder head, pistons, and bearings. Whether you're tackling rough terrain or cruising on the track, this component ensures that your Yamaha remains cool, reliable, and ready for action.

### Pros and Cons of buying a Yamaha 1LX-12450-01-00 YZ125 Water Pump Impeller Shaft (1987 Model)

1. **Direct Fitment** This part is specifically designed for the 1987 Yamaha YZ125, ensuring compatibility without modifications. This reduces the risk of installation issues or damage to the engine.

2. **Reliability** Yamaha parts are generally built to high standards, and a genuine or high-quality aftermarket impeller shaft should function reliably if properly installed. A failing water pump impeller shaft can lead to overheating, so replacing it prevents potential engine damage.

3. **Prevents Cooling System Failure** The impeller shaft drives the water pump, which circulates coolant through the engine. A worn or broken shaft can cause the pump to stop working, leading to overheating and potential catastrophic engine failure.

4. **Ease of Replacement** The YZ125 s water pump is relatively accessible, making this a straightforward DIY repair for most mechanics or enthusiasts with basic tools.

5. **Cost-Effective Long-Term Solution** Replacing a faulty impeller shaft is far cheaper than repairing or replacing an engine damaged by overheating. Even if the part itself is moderately priced, it avoids much higher costs down the line.

6. **Improves Engine Performance** A properly functioning water pump ensures consistent coolant flow, helping maintain optimal operating temperatures and engine efficiency.

1. **Potential Counterfeit Parts** If purchasing from an untrusted seller (especially online marketplaces), there is a risk of receiving a counterfeit or low-quality replica. This could lead to premature failure or poor performance.

2. **Labor Time and Skill Required** While the replacement is manageable for experienced DIYers, those without mechanical experience may struggle with tasks like removing the engine cover, accessing the water pump, or properly aligning the shaft.

3. **Additional Wear on Related Components** If the water pump itself (not just the impeller shaft) is worn out, replacing just the shaft may not fully resolve the issue. The pump bearings or seals might also need attention, adding to the cost.

4. **Limited Availability of Genuine Parts** Genuine Yamaha parts may be hard to find, especially for older models like the 1987 YZ125. This could force the buyer to rely on aftermarket options, which may vary in quality.

5. **Misalignment or Installation Errors** Improper installation of the impeller shaft (e.g., incorrect torque, misalignment, or failure to lubricate bearings) can lead to premature wear or failure. This requires careful attention to the manufacturer s instructions.

6. **Opportunity Cost** If the bike is not frequently ridden, the urgency to replace the part may be lower. Delaying the repair could mean the part fails at an inconvenient time, but it also means the money could be spent elsewhere if the bike is not actively used.

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Replacing the Yamaha 1LX-12450-01-00 water pump impeller shaft on a 1987 YZ125 is a **practical and necessary repair** if the part is failing or showing signs of wear. The benefits preventing engine damage, improving cooling efficiency, and avoiding costly repairs far outweigh the risks, provided the part is genuine and installed correctly. However, the cons highlight the importance of sourcing parts from reputable suppliers, ensuring proper installation, and considering the overall condition of the water pump system.

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1. **Source the Part Carefully** Purchase from a trusted dealer, Yamaha-approved distributor, or a well-reviewed aftermarket supplier (e.g., J&P Cycles, Cycle Gear, or eBay sellers with verified feedback). Avoid suspiciously cheap deals that may indicate counterfeit goods.

2. **Inspect the Water Pump** While replacing the impeller shaft, check the water pump s bearings and seals for wear. If they are damaged, replace the entire pump to avoid future issues.

3. **Follow Installation Guidelines** Refer to the Yamaha service manual or a detailed online guide (e.g., from *Cycle World* or *Motorcycle Mechanics Forum*) to ensure the shaft is installed correctly, including proper lubrication and torque specifications.

4. **Consider Professional Help if Needed** If you lack mechanical experience, consult a motorcycle mechanic to avoid mistakes that could void warranties or cause further damage.

5. **Budget for Potential Additional Repairs** If the water pump is old, it may be cost-effective to replace the entire pump assembly rather than just the shaft, depending on availability and pricing.

6. **Prioritize Based on Usage** If the bike is rarely ridden, the repair may not be urgent, but if it s a regularly used machine, addressing the issue promptly is advisable to prevent overheating and engine damage.

**Final Verdict:** **Buy and replace the impeller shaft** if you have confidence in the part s authenticity and the ability to install it correctly. This is a straightforward and cost-effective way to maintain your YZ125 s cooling system and avoid more severe (and expensive) problems.

Details:

Good clean condition, but will have some slight marks, and rust marks as it is a used part. This is a used item, which will have slight marks, and some potential wear, age-related marks.

part #: 1lx124500100 prices

• $15.00-$70.68

specifications cyclevintagee:

• for models: Yz125
• for makes: Yamaha
• mpn: 1lx-12450-01-00
• part type: Pump Impeller Shaft
• machine type: Off-road Motorcycle
• vintage part: Yes
• universal fitment: No
• compatible year: 1986, 1987
• country of origin: Japan

offer cyclevintagee:

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

general cyclevintagee:

• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
• condition: Used

shipping cyclevintagee:

• carrier: USPS
• cost: $9.00
• class: Standard
• service: USPS Ground Advantage
• type: Fixed
• transit: 5-9 Days

returns cyclevintagee:

• policy: No Returns

seller cyclevintagee:

• # reviews: 40
• rating: 100.0%
• city: Escondido, California

payments cyclevintagee:

• credit card: Diners-club
• wallet: Apple-pay
• other

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