KAWASAKI 21250-0540 Generator Stator Coil Alternator

( Manufacturer Part Number: 21250-0540 ), ( Part Type: Generator Stator Coil Alternator ), ( Unit Type: Ft ), ( Oe/oem Part Number: 21076019 ), ( Vintage Part: Yes ), ( Compatible Year: 1977, 1976, 1975, 1974 ), ( Country Of Origin: Japan )

Review KAWASAKI Generator Stator Coil Alternator Tested fits KZ400 1974–1977

The **Kawasaki 21250-0540 KZ400 Generator Stator Coil Alternator** is a meticulously crafted, high-performance component designed exclusively for Kawasaki s legendary **KZ400** air-cooled, four-stroke motorcycle engines produced between **1974 and 1977**. This stator coil alternator assembly represents the heart of the motorcycle s electrical system, responsible for generating the alternating current necessary to charge the battery and power the vehicle s electrical accessories, including the headlight, ignition system, and instrumentation. Engineered with Kawasaki s signature precision, this component features a robust **three-phase stator winding** encased in a durable, heat-resistant coil assembly, ensuring reliable and consistent power output even under demanding riding conditions. The stator coil is meticulously wound with high-grade copper wire, optimized for efficiency and longevity, while the alternator s internal construction incorporates a **permanent magnet rotor** that spins within the stator s magnetic field to induce the electrical current. This design minimizes friction and wear, contributing to the alternator s durability and the overall reliability of the motorcycle s electrical infrastructure. The **21250-0540** part number denotes a direct OEM replacement, guaranteeing an exact fit with the original equipment specifications, including the correct wire gauge, coil configuration, and mounting dimensions. Whether restoring a classic KZ400 to its former glory or maintaining one of these iconic machines, this stator coil alternator is a critical component that ensures seamless electrical performance, allowing riders to enjoy the unmatched power and agility of the KZ400 without electrical malfunctions or power loss. Built to withstand the rigors of off-road adventures and high-speed cruising alike, this alternator exemplifies Kawasaki s commitment to engineering excellence, blending form and function to deliver a part that is as enduring as the motorcycle it powers.

### **Pros and Cons of buying a Kawasaki 21250-0540 KZ400 Generator Stator Coil Alternator (1974 1977 Models)**

1. **Direct Compatibility** This part is specifically designed for Kawasaki KZ400 models from 1974 to 1977, ensuring a perfect fit without modification. This eliminates the risk of purchasing a generic or mismatched component that may not function correctly.

2. **Reliability of Kawasaki Parts** Kawasaki is a well-known manufacturer with a reputation for durable and high-quality components. A genuine or high-quality aftermarket stator coil alternator should provide reliable performance, reducing the likelihood of frequent failures.

3. **Prevents Electrical Issues** The stator coil and alternator are critical for generating the electrical power needed for ignition, lighting, and accessories. A failing or worn-out unit can lead to starting problems, dim lights, or complete electrical failure. Replacing it proactively can prevent costly breakdowns.

4. **Potential Cost Savings** If the stator coil or alternator is failing, repairing or replacing other related components (such as the regulator, wiring, or battery) may be necessary. Addressing the issue early with this part can avoid compounded repairs later.

5. **Easier Maintenance** Since this part is designed for older Kawasaki engines, it may be easier to source than aftermarket alternatives that require additional adapters or modifications. It also simplifies the installation process, as it fits seamlessly into the existing electrical system.

6. **Long-Term Durability** If the part is in good condition and properly installed, it can last for many years, especially if the generator is not subjected to extreme stress (e.g., frequent deep cycling or high loads).

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1. **Age and Wear** Since these parts are for older models (1974 1977), they may have been stored for decades, leading to potential wear, corrosion, or degradation. Even if the part looks intact, internal components like brushes, bearings, or windings could be worn out.

2. **Limited Availability** Genuine Kawasaki OEM parts for this era may be difficult to find, especially if the seller is not a reputable dealer. Aftermarket parts may be available, but quality can vary significantly. You may need to search through multiple sources (e.g., eBay, specialty motorcycle parts stores, or salvage yards) to find a suitable option.

3. **Higher Cost Relative to Newer Models** Parts for older motorcycles can be more expensive than those for newer models due to lower production volumes and higher demand from collectors or restorers. This may not be cost-effective if the motorcycle is not a high-value project.

4. **Potential for Counterfeit or Low-Quality Parts** Buying from unverified sellers increases the risk of receiving a fake, refurbished, or poorly made part. A counterfeit stator coil or alternator may fail prematurely or cause electrical issues, leading to further damage.

5. **Installation Challenges** While the part is designed for these models, if you lack mechanical experience, installation could be tricky. Improper installation (e.g., loose connections, incorrect wiring) can lead to electrical shorts, poor performance, or even damage to the generator or engine.

6. **Compatibility with Modified Systems** If the motorcycle has been modified (e.g., upgraded wiring, aftermarket electrical components, or a rebuilt engine), the stator coil or alternator may not integrate perfectly. You may need to verify compatibility with the specific modifications.

7. **Testing Required** Even if the part looks new or well-maintained, it s wise to test it before installation. A multimeter can check for proper voltage output, and a visual inspection can confirm there are no internal shorts or damaged windings. If the part fails testing, you risk wasting money on an unusable component.

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Buying the Kawasaki 21250-0540 stator coil alternator for a 1974 1977 KZ400 can be a **wise investment** if you prioritize reliability, compatibility, and long-term performance. The part is specifically designed for your motorcycle, reducing the risk of fitment issues, and replacing a failing component can prevent more extensive electrical or ignition problems. However, the **potential for age-related wear, limited availability, and the risk of counterfeit parts** make it essential to source the part carefully.

If you proceed with the purchase, **verify the part s condition, test it before installation, and ensure it comes from a trusted seller** (preferably a Kawasaki dealer or a reputable aftermarket supplier). If you re unsure about installation, consult a mechanic familiar with vintage Kawasaki engines.

1. **Source from a Trusted Supplier** Purchase from a Kawasaki dealer, a well-reviewed aftermarket parts store, or a seller with a proven track record (e.g., one who provides photos, test results, or a warranty). Avoid unknown sellers offering parts at suspiciously low prices, as this may indicate fakes or damaged goods.

- Proof of authenticity (e.g., OEM packaging, serial number verification).

- Visual inspection (check for rust, cracks, or burnt wiring).

- Electrical testing (use a multimeter to confirm proper voltage output under load if possible).

If buying online, request a video inspection or return policy in case the part is defective.

- **Aftermarket Replicas** Brands like **Kawasaki Performance Parts, Denso, or Bosch** may offer compatible alternators or stator coils. Ensure they match the electrical specifications of the original.

- **Salvage Yards** A working alternator from a similar Kawasaki model (e.g., KZ650, if compatible) could be a cost-effective option if you re comfortable disassembling and testing it.

- **DIY Repairs** If the stator coil is the only failing component, a skilled mechanic might be able to repair it rather than replace the entire alternator.

4. **Install Properly** If you re not experienced with electrical work, have a mechanic install the part to avoid wiring mistakes that could damage the generator or other components.

5. **Maintain the System** After installation, monitor the motorcycle s electrical performance. Watch for signs of failure (e.g., dim lights, difficulty starting, or warning lights) and address them promptly.

**Final Verdict:** If you can source a **high-quality, tested, and authentic** Kawasaki 21250-0540 stator coil alternator, it is a **recommended purchase** for restoring or maintaining your KZ400 s electrical system. However, proceed with caution, prioritize quality over cost, and ensure the part is in good working condition before installation.

Details:

Z400 KZ400 KZ400D, Field coil assembly OEM part number: 21077002 ND 21250-0540 Stator 21076019 Removed from a 1974. All wiring is in good condition and kept attached as an assembly. Fits 1974 1975 1976 1977 Kawasaki 400 twins.

part #: 212500540 price

• $51.34

specifications cyclevintagee:

• for models: Kz400
• for makes: Kawasaki
• for years: 1974-1977
• mpn: 21250-0540
• part type: Generator Stator Coil Alternator
• unit type: Ft
• oe/oem part number: 21076019
• vintage part: Yes
• compatible year: 1977, 1976, 1975, 1974
• country of origin: Japan

general cyclevintagee:

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

shipping cyclevintagee:

• cost: $8.13
• service: USPS Ground Advantage
• class: Standard
• type: Calculated
• transit: 6-13 Days
• carrier: USPS

seller cyclevintagee:

• city: Seattle, Washington
• rating: 100.0%
• # reviews: 77

offer cyclevintagee:

• quantity: 1
• availability: In Stock
• started: May 14, 2026
• best offers: True
• options: Ship-to-home
• sold: 0

returns cyclevintagee:

• policy: No Returns

payments cyclevintagee:

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

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