1. Motorcycle Spark Plugs For Sale
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  3. KAWASAKI 21131-002

KAWASAKI 21131-002 Plug Cap Grommet Nos

fits make: Kawasaki.

21131-002 Kawasaki Oem Plug Cap Grommet A Nos

( Manufacturer Part Number: 21131-002 ), ( Part Type: Plug Cap )

Review KAWASAKI Oem Plug Cap Grommet Nos

The **Kawasaki 21131-002 Plug Cap Grommet** is a precision-engineered rubber sealing component designed exclusively for Kawasaki engines, ensuring optimal performance, durability, and reliability in demanding applications. This high-quality grommet serves as a critical barrier between the engine s electrical system and external elements, preventing moisture, dust, and debris from infiltrating sensitive wiring connections while maintaining a secure, vibration-resistant fit. Crafted from a durable, oil- and heat-resistant synthetic rubber compound, the grommet is engineered to withstand the harsh conditions of off-road and high-performance environments, where exposure to dirt, water, and extreme temperatures is common. Its snug, interference-fit design ensures a tight seal around the plug cap, minimizing the risk of electrical shorts or corrosion that could compromise engine functionality. Whether installed on a Kawasaki dirt bike, ATV, or marine engine, this grommet plays a vital role in preserving the integrity of the ignition system, extending the lifespan of wiring harnesses, and reducing maintenance downtime. With its universal compatibility across Kawasaki models requiring the **21131-002** part number, this grommet is an essential replacement for mechanics and enthusiasts seeking to restore or enhance the reliability of their Kawasaki-powered machinery. Proper installation, using the correct tools to avoid stretching or damaging the rubber, is key to ensuring a long-lasting, leak-free seal.

### Pros and Cons of buying a Kawasaki 21131-002 Plug Cap Grommet (NOS)

#### **Pros:**

1. **Original Equipment Quality** As a new old stock (NOS) part, it is manufactured to Kawasaki s original specifications, ensuring a reliable fit and performance. This reduces the risk of compatibility issues or premature wear compared to aftermarket alternatives.

2. **Reliability and Durability** Kawasaki parts are known for their robustness, especially in critical components like plug caps and grommets. A high-quality grommet ensures a proper seal, preventing moisture, dust, and debris from entering sensitive electrical connections, which can prolong the life of your engine and ignition system.

3. **Ease of Installation** Since it is a direct replacement part, installation is straightforward, often requiring minimal tools or adjustments. This saves time and reduces the likelihood of installation errors that could occur with non-OEM parts.

4. **Compatibility** The 21131-002 is designed specifically for Kawasaki engines (likely used in models like the Ninja 250R, Z650, or similar), ensuring an exact fit without modifications. This eliminates guesswork in sizing or part selection.

5. **Long-Term Cost Savings** While the upfront cost may be higher than some aftermarket options, a well-made NOS part can prevent costly repairs down the line. A failing grommet could lead to ignition issues, electrical shorts, or water damage, which are far more expensive to fix than replacing a single part.

6. **Resale Value** If you plan to sell your bike in the future, having original or high-quality NOS parts can appeal to buyers who prioritize authenticity and reliability, potentially increasing the bike s resale value.

7. **Warranty or Return Options** Purchasing from a reputable dealer or distributor may come with a warranty or return policy, providing peace of mind in case the part is defective or doesn t fit as expected.

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#### **Cons:**

1. **Higher Cost** NOS parts are typically more expensive than aftermarket or used alternatives. For budget-conscious buyers, this could be a significant drawback, especially if the part is not critical to immediate operation.

2. **Limited Availability** NOS parts may not always be in stock, requiring patience or expedited shipping. Some dealers may not carry this specific part, forcing you to search multiple sources or wait for restocking.

3. **Potential for Overkill** If the grommet is not a frequently failing part in your bike s model, replacing it solely for preventive maintenance might not be justified. In such cases, the cost may not be worth the benefit.

4. **Storage and Handling Risks** NOS parts are stored in inventory for extended periods, which could theoretically expose them to environmental factors (e.g., humidity, dust) if not properly sealed. However, reputable sellers mitigate this risk by using protective packaging.

5. **No Guarantee of New Condition** While "new old stock" implies the part is unused, there is no absolute guarantee that it has been perfectly preserved. Some NOS parts may show minor signs of wear or handling marks, though these are usually negligible for functionality.

6. **Alternative Parts May Suffice** For some riders, aftermarket grommets or even DIY solutions (e.g., silicone seals) could provide adequate protection at a lower cost. If the primary concern is sealing rather than brand loyalty, these alternatives might be sufficient.

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### **Conclusion:**

The Kawasaki 21131-002 plug cap grommet (NOS) is a high-quality, reliable part that offers peace of mind for riders who prioritize original equipment standards and long-term durability. Its advantages in terms of fit, performance, and longevity make it a strong choice for those who can justify the higher cost. However, if budget constraints or the part s criticality are concerns, aftermarket options or preventive maintenance assessments may be more practical.

For most riders who value their bike s electrical integrity and are willing to invest in genuine parts, the 21131-002 is a **highly recommended purchase**, especially if you re restoring or maintaining a high-mileage Kawasaki. If you re unsure about the part s necessity, consult a mechanic or Kawasaki service manual to confirm whether replacement is urgent or optional.

### **Final Recommendation:** **Buy the Kawasaki 21131-002 NOS grommet if:**

- You re experiencing or suspecting issues with moisture/dust ingress in your ignition system.

- You prefer OEM parts for reliability and resale value.

- Your bike s model requires this exact part for proper function.

- You can afford the higher cost without hesitation.

**Consider alternatives if:**

- The part is not failing but you re replacing it preemptively.

- You re on a tight budget and aftermarket parts meet your needs.

- You re unsure whether the grommet is the root cause of any symptoms (diagnose first).

For most cases where electrical sealing is critical, the NOS part is the best choice. Always purchase from a trusted dealer to ensure authenticity and quality.

Details:

Item Overview. All parts are unused, dealer-sourced, and classified as New Old Stock NOS. Brands include Yamaha, Ford, Polaris, Mack, Arctic Cat as the brands, and many more including parts for Motorcycles, Small Engines, marine.

part #: 21131002 prices

  • $5.93-$14.07

specifications cyclesparkplugs:

  • for makes: Kawasaki
  • mpn: 21131-002
  • part type: Plug Cap

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general cyclesparkplugs:

  • condition: New other see details
  • Motorcycle Scooter Parts Accessories > Electrical Ignition Components > Spark Plugs

seller cyclesparkplugs:

  • city: Ashaway, Rhode Island
  • rating: 99.9%
  • # reviews: 137889

returns cyclesparkplugs:

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

shipping cyclesparkplugs:

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  • class: Standard, Expedited, One-day
  • carrier: USPS, UPS
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offer cyclesparkplugs:

  • best offers: True
  • quantity: 1
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • started: May 20, 2026
for makes: kawasaki, part type: plug cap,
category: motorcycle parts > motorcycle scooter parts accessories > electrical ignition components > spark plugs, sku: 14237262855500872,
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