1. USED Motorcycle/Scooter Clutches Items
  2. sku: 4953985711860633
  3. RIVERA RE-CD-37-66-90-A

RIVERA ENGINEERING RE-CD-37-66-90-A Primo Big Basket Ring Sprocket Gear

fits model: Evo, Twin. year: 1990–1993.

Re-cd-37-66-90-a Rivera Engineering Primo 90-93 Evo Big Twin Basket Sprocket Ring Gear

( Brand: Rivera Engineering ), ( Manufacturer Part Number: RE-CD-37-66-90-A ), ( Type: Clutch Kit )

Review RIVERA ENGINEERING Primo Big Basket Sprocket Ring Gear fits EVO TWIN 1990–1993

The Rivera Engineering RE-CD-37-66-90-A Primo 90-93 Evo Big Twin Basket Sprocket Ring Gear is an essential upgrade for Harley-Davidson motorcycles with a 90-93 Evo Big Twin engine. This high-performance ring gear is meticulously engineered to provide superior strength, durability, and reliability compared to the OEM part.

Crafted from heat-treated steel, the ring gear boasts increased tensile strength to withstand the heavy loads and torque generated by the engine. The teeth on the gear are precision-machined to ensure perfect engagement with the sprocket, resulting in smooth power transmission and reduced wear and tear.

Moreover, the Rivera Engineering ring gear features a larger diameter than the stock part, which allows for the installation of larger aftermarket sprockets. This modification can lead to increased horsepower, torque, and improved overall engine performance.

The ring gear comes with a proprietary coating that provides excellent protection against corrosion and wear. This coating ensures the gear maintains its performance and reliability even in harsh riding conditions, such as extreme temperatures, humidity, and exposure to the elements.

The installation process for the Rivera Engineering RE-CD-37-66-90-A Primo 90-93 Evo Big Twin Basket Sprocket Ring Gear is straightforward and can be completed with common hand tools. The kit includes all the necessary hardware for a hassle-free installation, and the instructions are clear and easy to follow.

In summary, the Rivera Engineering RE-CD-37-66-90-A Primo 90-93 Evo Big Twin Basket Sprocket Ring Gear is an essential upgrade for Harley-Davidson motorcycles with a 90-93 Evo Big Twin engine. This high-performance ring gear offers increased strength, durability, and reliability, as well as the ability to install larger aftermarket sprockets for improved engine performance. Its precision-machined teeth, heat-treated steel construction, and corrosion-resistant coating make it a top choice for Harley-Davidson enthusiasts looking to enhance their riding experience.

The Rivera Engineering RE-CD-37-66-90-A Primo 90-93 Evo Big Twin Basket Sprocket Ring Gear is a replacement part designed for Harley-Davidson motorcycles. This component is essential for transmitting power from the engine to the rear wheel. Here are some potential pros and cons of purchasing this part:

Pros:

1. Superior Quality: Rivera Engineering is known for manufacturing high-quality aftermarket parts. This ring gear is CNC machined from billet steel, ensuring precision and durability.

2. Enhanced Performance: Upgrading to a stronger ring gear can improve engine performance by reducing power loss due to a weak or worn-out factory ring gear.

3. Custom Fit: This ring gear is designed specifically for Harley-Davidson models between 1990 and 1993 with the Evo Big Twin engine.

4. Easy Installation: The installation process is relatively straightforward, allowing for a DIY project or a quick shop visit.

Cons:

1. Cost: This aftermarket part comes with a higher price tag compared to OEM (Original Equipment Manufacturer) ring gears.

2. Potential Noise: Some users have reported an increase in noise levels after installing a stronger ring gear. However, this can be mitigated by properly balancing the drive system.

Conclusion:

The Rivera Engineering RE-CD-37-66-90-A Primo 90-93 Evo Big Twin Basket Sprocket Ring Gear offers several benefits for Harley-Davidson motorcycle owners, such as improved performance and superior quality. However, its higher cost and potential noise increase are factors to consider before making a purchase.

Recommendation:

If you're looking to upgrade your Harley-Davidson's power transmission system, this ring gear is a solid choice. Weigh the benefits against the cons and decide if the investment is worth it for your specific needs and budget.

Details:

Comes with PC-1200-CA. Rivera Engineering p/n: RE-CD-37-66-90-A, One piece aluminum basket with 37 tooth sprocket and 66 ring gear. Fits 1990 1993 Harley-Davidson Evo Big Twin.

part #: recd376690 price

  • $119.97

specifications scookit:

  • for models: Evo, Twin
  • for years: 1990-1993
  • brand: Rivera Engineering
  • mpn: Re-cd-37-66-90-a
  • type: Clutch Kit

payments scookit:

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

returns scookit:

  • policy: No Returns

offer scookit:

  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home
  • started: July 15, 2025
  • sold: 0

seller scookit:

  • city: Myrtle Beach, South Carolina
  • rating: 97.2%
  • # reviews: 1009

shipping scookit:

  • type: Fixed
  • service: USPS Priority Mail Medium Flat Rate Box
  • carrier: USPS
  • cost: $18.40
  • transit: 3-9 Days
  • class: Expedited

general scookit:

  • condition: New
  • Transmission Drivetrain > Clutch Parts Kits > Complete Clutches Kits
for models: evo, twin, for years: 1990-1993, type: clutch kit,
category: auto parts > transmission drivetrain > clutch parts kits > complete clutches kits, sku: 4953985711860633,

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