KAWASAKI 21142-003 Ignition Rotor Cap JB5

( Part Type: Ignition Rotor Cap ), ( Manufacturer Part Number: 21142-003 ), ( Compatible Year: 1972, 1970, 1971 )

Review KAWASAKI New Genuine Ignition Rotor Cap Jb5 fits H1 500 1969–1972

Introducing the Kawasaki 21142-003 ignition rotor cap JB5, an essential component for the ignition system of Kawasaki H1 500 motorcycles manufactured between 1969 and 1972. This part plays a crucial role in the spark plug ignition process, ensuring a reliable and efficient engine performance.

The Kawasaki 21142-003 ignition rotor cap JB5 is a precision-crafted component, designed to fit perfectly onto the crankshaft end of the distributor. Its robust construction is achieved through the use of high-quality materials that can withstand the demanding conditions of continuous use in a motorcycle engine. The cap is finished in a durable black coating that not only enhances its aesthetic appeal but also provides protection against environmental factors.

This ignition rotor cap features a distinctive design that includes five slots, each representing a specific point in the engine's ignition sequence. The slots are strategically placed to optimize the spark discharge between the spark plugs and the distributor cap, ensuring a smooth and consistent power delivery to the engine.

Installation of the Kawasaki 21142-003 ignition rotor cap JB5 is a straightforward process. It simply replaces the worn-out or damaged cap on the distributor. The cap is secured in place by the distributor rotor, which presses against the cap to maintain a tight seal and ensure proper ignition system function.

In conclusion, the Kawasaki 21142-003 ignition rotor cap JB5 is an essential replacement part for the H1 500 motorcycles produced between 1969 and 1972. Its robust construction, reliable performance, and easy installation make it an indispensable addition to your motorcycle maintenance toolkit. Whether you're a seasoned motorcycle rider or a novice, this ignition rotor cap is a must-have component to keep your Kawasaki H1 500 running at its best.

Pros and Cons of buying a Kawasaki H1 500 Ignition Rotor Cap JB5 (21142-003)

a. OEM Part: This product is an original equipment manufacturer (OEM) part, ensuring a perfect fit and optimal performance for your Kawasaki H1 1969-1972 motorcycle.

b. Reliable: Kawasaki is a well-known brand for producing high-quality motorcycle parts. The ignition rotor cap is likely to provide long-lasting performance and reliability.

c. Improves Performance: A faulty or worn-out ignition rotor cap can negatively impact engine performance. Replacing it with a new one can help improve the overall performance of your motorcycle.

d. Prevents Damage: A worn-out ignition rotor cap can cause further damage to other engine components. Replacing it with a new one can help prevent potential damage and save costs in the long run.

a. Cost: The price of the ignition rotor cap may seem high to some. However, considering the importance of this part in the ignition system, the cost may be justified for maintaining the overall health of the engine.

b. Availability: Depending on the location and specific dealer, availability of this part may be limited. It's essential to research and ensure that the part is in stock before making a purchase.

c. Installation: Installing the ignition rotor cap may require some technical knowledge and skills. It's recommended to consult a professional mechanic for installation or follow the manufacturer's instructions carefully.

The Kawasaki H1 500 Ignition Rotor Cap JB5 (21142-003) is an essential part for maintaining the performance and health of your Kawasaki H1 1969-1972 motorcycle. Although it may come with a cost and limited availability, the benefits of a reliable OEM part and improved engine performance make it a worthwhile investment. Considering the potential damage that a worn-out ignition rotor cap can cause, the cost-effectiveness of preventing further damage should be taken into account.

If you own a Kawasaki H1 1969-1972 motorcycle, it's recommended to regularly inspect your ignition system and replace the ignition rotor cap as needed to ensure optimal engine performance and prevent potential damage. It's essential to purchase the part from a trusted dealer or retailer to ensure its authenticity and quality.

part # 21142003 prices

• $67.50-$90.00

specifications ignitioncompo:

• for models: H1, 500
• for makes: Kawasaki
• for years: 1969-1972
• part type: Ignition Rotor Cap
• manufacturer part number: 21142-003
• compatible year: 1972, 1970, 1971

returns ignitioncompo:

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

payments ignitioncompo:

• other
• wallet: Google-pay
• credit card: Visa

offer ignitioncompo:

• availability: In Stock
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: April 19, 2026

shipping ignitioncompo:

• service: USPS Ground Advantage, USPS Priority Mail
• type: Calculated
• cost: $10.15
• carrier: USPS
• transit: 4-10 Days
• class: Standard, Expedited

seller ignitioncompo:

• rating: 100.0%
• # reviews: 4692

general ignitioncompo:

• condition: New
• Motorcycle Scooter Parts Accessories > Electrical Ignition Components > Other Electrical Ignition Components

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