PRIMO PP-118-EVO Ring Gear Bolt Big 66T SM17

( Brand: Primo ), ( Manufacturer Part Number: PP-118-EVO ), ( Part Type: Ring Gear Bolt ), ( Number Of Teeth: 66 ), ( Oe/oem Part Number: 86121, 242080 ), ( Country Of Origin: United States )

Review PRIMO Ring Gear Bolt 66t Harley Davidson Big fits TWINS 1986–1993

Introducing the Primo PP-118-EVO Ring Gear Bolt for Harley-Davidson Big Twins, specifically designed for the models produced between 1986 and 1993 with the SM17 transmission and 66t ring gear. This is a high-performance upgrade that sets a new standard in strength and durability for your motorcycle.

The Primo PP-118-EVO Ring Gear Bolt is engineered using premium materials, ensuring maximum reliability. The bolt is made from SAE 4340 Chromoly steel, which is known for its exceptional tensile strength and resistance to fatigue. By upgrading to this bolt, you can ensure that your ring gear remains securely fastened and that your transmission operates at its peak performance.

This bolt is also designed with a 12-point star head, which provides a more significant contact area between the bolt and the socket. This feature enhances the torque transfer between the tool and the bolt, reducing the risk of rounding out the bolt head and improving the overall installation experience.

The Primo PP-118-EVO Ring Gear Bolt is also finished with a black zinc coating, which offers superior protection against corrosion and rust. This coating not only provides a visually appealing appearance but also ensures that the bolt remains in excellent condition, even in the harshest environments.

This bolt is a direct replacement for the original OEM part and requires no modifications for installation. It comes in a convenient packaging that includes a high-quality, reusable Primo tool bag to keep the bolt protected during storage and transportation.

In summary, the Primo PP-118-EVO Ring Gear Bolt is an essential upgrade for Harley-Davidson Big Twins with the SM17 transmission and 66t ring gear produced between 1986 and 1993. This bolt offers superior strength, durability, and corrosion resistance, ensuring optimal performance and reliability for your motorcycle.

Primo PP-118-EVO Ring Gear Bolt for Harley-Davidson Big Twins (1986-1993): A Comprehensive Analysis

The Primo PP-118-EVO Ring Gear Bolt is a crucial component for Harley-Davidson Big Twin motorcycles manufactured between 1986 and 1993. This bolt is specifically designed for use with a 66t ring gear. In this analysis, we will discuss the advantages and disadvantages of purchasing this part.

1. High-quality material: The Primo PP-118-EVO Ring Gear Bolt is made from premium materials, ensuring durability and reliability.

2. Corrosion resistance: This bolt is designed to withstand harsh environmental conditions, making it an excellent choice for those riding in coastal areas or other corrosive environments.

3. Enhanced torque capacity: The Primo PP-118-EVO Ring Gear Bolt has an increased torque capacity compared to OEM bolts, ensuring a secure connection and improved performance.

4. Precision manufacturing: Each bolt is manufactured to tight tolerances, ensuring a perfect fit and proper engagement with the ring gear.

1. Cost: The Primo PP-118-EVO Ring Gear Bolt is more expensive than OEM bolts. However, the increased cost is justified by the superior quality and durability of the part.

2. Availability: This bolt may not be readily available at local Harley-Davidson dealers or auto parts stores, making it necessary to order online.

3. Installation: Installing the Primo PP-118-EVO Ring Gear Bolt may require additional tools and expertise compared to OEM bolts, increasing the overall cost and time investment.

The Primo PP-118-EVO Ring Gear Bolt is an investment in the longevity and performance of your Harley-Davidson Big Twin motorcycle. While it may come with a higher cost and require additional resources for installation, the benefits of superior material quality, increased torque capacity, and corrosion resistance make it a worthwhile investment for those seeking enhanced reliability and improved performance.

If you are looking to upgrade the ring gear bolt on your Harley-Davidson Big Twin motorcycle from 1986 to 1993, we recommend considering the Primo PP-118-EVO Ring Gear Bolt. This part offers numerous advantages over OEM bolts, including increased durability, enhanced torque capacity, and corrosion resistance. While the cost and installation process may be more involved, the long-term benefits make it a worthwhile investment for those seeking to optimize the performance of their motorcycle.

Details:

Primo PP-118-EVO, Ring Gear 6 BOLT, 66T Harley Davidson Big Twins 1986 -1993.

part #: pp118 prices

• $69.00-$84.99

specifications scookit:

• for models: Twins
• for makes: Harley, Davidson
• for years: 1986-1993
• brand: Primo
• mpn: Pp-118-evo
• part type: Ring Gear Bolt
• number of teeth: 66
• oe/oem part number: 86121, 242080
• country of origin: United States

shipping scookit:

• transit: 3-6 Days
• class: Standard
• cost: $9.99
• service: Standard
• type: Fixed

seller scookit:

• # reviews: 4602
• city: Clear Lake, Minnesota
• rating: 99.8%

returns scookit:

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

general scookit:

• condition: New
• Transmission Drivetrain > Clutch Parts Kits > Complete Clutches Kits

payments scookit:

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

offer scookit:

• started: February 28, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock
• best offers: True
• quantity: 1

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