Choosing the right 6 speed transmission conversion kit for a Harley Davidson can significantly impact your ride’s performance, durability, and ease of installation. Among the leading options, the Jims 8085 6-Speed Precision-Cut Transmission Super Kit stands out for its aerospace-grade steel construction and precision machining, making it ideal for riders seeking high-quality, ready-to-install kits. The Jims 6-Speed Transmission Rebuild Kit 1068 offers a comprehensive rebuild solution with all necessary components included, perfect for those wanting a full overhaul. Meanwhile, the 6-Speed Transmission Rebuild Kit (2007-2016) provides a budget-friendly rebuild option with US-made parts, suitable for riders restoring older models. Each has tradeoffs—cost, complexity, and compatibility—so understanding these differences is key to making an informed choice.
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Key Takeaways
- The Jims 8085 kit is best for high-performance builds with precision machining and aerospace quality steel.
- The rebuild kits like 1068 and 1056 are ideal for full transmission restorations, offering all necessary parts.
- Compatibility varies: some kits are designed for specific years or models, influencing your selection.
- Price and ease of installation differ: premium kits cost more but save time, while rebuild kits are more affordable but complex.
- Durability and precision are critical—choose a kit matching your riding style and maintenance readiness.
| Jims 8085 6-Speed Precision-Cut Transmission Super Kit |  | Best Premium High-Performance Kit | Material: Aerospace quality steel | Compatibility: 98-99 Harley transmission top covers | Construction: Precision-machined | VIEW ON AMAZON | See Our Full Breakdown |
| Jims 6-Speed Transmission Rebuild Kit 1068 |  | Best Overall Rebuild Kit | Compatibility: 1994-2006 Harley models | Included: Gaskets, seals, bearings, locks | Made In: USA | VIEW ON AMAZON | See Our Full Breakdown |
| 6-Speed Transmission Rebuild Kit (2007-2016) |  | Best Cost-Effective Rebuild Kit | Compatibility: 2007-2016 Harley models | Included Parts: Gaskets, seals, locks, bearings | Material Quality: OEM-grade components | VIEW ON AMAZON | See Our Full Breakdown |
| speed transmission conversion kit for harley davidson | Compatibility | Made In | Weight | Material Quality |
|---|---|---|---|---|
| Jims 8085 6-Speed Precision-Cu | 98-99 Harley transmission top covers | USA | 4 pounds | — |
| Jims 6-Speed Transmission Rebu | 1994-2006 Harley models | USA | 3.3 pounds | OEM-grade components |
| 6-Speed Transmission Rebuild K | 2007-2016 Harley models | USA | 3.8 pounds | OEM-grade components |
More Details on Our Top Picks
Jims 8085 6-Speed Precision-Cut Transmission Super Kit
This kit stands out for its aerospace-quality steel and precision machining, ensuring a smooth shift and long-lasting durability. Compared with rebuild kits, it offers a ready-to-slip-in experience, saving installation time. Its design is tailored specifically for 98-99 style transmission top covers, which can be a limitation for some models. The detailed instructions support proper installation, but the premium price might deter budget-conscious riders. Still, for those seeking a high-performance upgrade, this kit offers superior precision and build quality that justifies the cost.
Pros:- Made of aerospace-grade steel for durability.
- Precision-cut components for smooth shifting.
- Designed specifically for 98-99 transmission top covers.
- Includes detailed installation instructions.
Cons:- Higher cost compared to rebuild kits.
- Limited compatibility with certain models.
- Requires specific top cover design.
Best for: Riders aiming for high-performance, precision, and durability in their transmission upgrades.
Not ideal for: Beginners or those working on older or incompatible Harley models without the specific top cover design.
- Material:Aerospace quality steel
- Compatibility:98-99 Harley transmission top covers
- Construction:Precision-machined
- Included Components:All necessary gears and locks
- Made In:USA
- Weight:4 pounds
Our verdict“This premium kit is ideal for those prioritizing performance and precision, and willing to invest in quality.”
Jims 6-Speed Transmission Rebuild Kit 1068
This rebuild kit offers a complete set of gaskets, seals, locks, and bearings to restore a 6-speed transmission comprehensively. Compared to other rebuild kits, it provides a full overhaul solution, making it suitable for restoring older models or repairing damaged transmissions. However, it requires more mechanical skill and time to install, which might challenge novice mechanics. Its made-in-USA quality ensures longevity, but the lack of direct performance upgrades means it’s more about restoration than enhancement. Still, for those restoring or maintaining vintage Harleys, this kit delivers excellent value and reliability.
Pros:- Includes all necessary gaskets, seals, and bearings.
- Made in the USA for quality assurance.
- Ideal for full transmission restoration.
- Suitable for a wide range of Harley models.
Cons:- Installation can be complex and time-consuming.
- Does not enhance performance, only rebuilds.
- Requires mechanical expertise.
Best for: Harley owners restoring older models or performing full transmission rebuilds.
Not ideal for: Riders seeking performance upgrades or those unfamiliar with transmission rebuilds.
- Compatibility:1994-2006 Harley models
- Included:Gaskets, seals, bearings, locks
- Made In:USA
- Weight:3.3 pounds
- Material Quality:OEM-grade components
- Installation Skill:Moderate to advanced
Our verdict“This rebuild kit offers a reliable, comprehensive solution for restoring vintage Harley transmissions with quality parts.”
6-Speed Transmission Rebuild Kit (2007-2016)
This kit provides all the essential gaskets, seals, locks, and bearings to rebuild a 6-speed transmission from 2007 to 2016 models. It’s a budget-friendly choice for riders comfortable with DIY repairs, offering good quality parts made in the USA. The main tradeoff is that it may lack some of the precision machining or high-end materials found in premium kits, which could impact longevity under aggressive riding. Nevertheless, it’s an excellent choice for restoring or maintaining bikes without breaking the bank, especially for those with some mechanical experience.
Pros:- Affordable price point.
- Includes all necessary rebuild components.
- Made in the USA for quality assurance.
- Suitable for 2007-2016 Harley models.
Cons:- Less precision than premium kits.
- Requires mechanical skill and time to install.
- Limited performance enhancements.
Best for: Budget-conscious riders needing a reliable rebuild for newer Harley models from 2007-2016.
Not ideal for: High-performance enthusiasts or those with older, incompatible models.
- Compatibility:2007-2016 Harley models
- Included Parts:Gaskets, seals, locks, bearings
- Material Quality:OEM-grade components
- Made In:USA
- Weight:3.8 pounds
Our verdict“This rebuild kit balances cost and quality, making it perfect for budget restorations on recent Harley models.”
How We Picked
Our selection process focused on compatibility, build quality, and ease of installation for Harley Davidson models requiring 6-speed conversions. We prioritized kits with high-grade materials, accurate machining, and comprehensive component inclusion. Customer reviews and manufacturer reputation also played a role, alongside considering whether each kit suits beginners or experienced mechanics. Price-to-value ratio was a key factor, ensuring options fit a range of budgets without sacrificing essential quality. Compatibility with common Harley models from various years was essential to make our recommendations versatile and practical.
Factors to Consider When Choosing 6 Speed Transmission Conversion Kit For Harley Davidson
When selecting a 6 speed transmission conversion kit for your Harley Davidson, it’s essential to consider your riding style, mechanical skills, model compatibility, and budget. The right kit can improve shifting smoothness, durability, or restore your transmission to peak condition. This guide highlights key factors to evaluate before making a purchase, ensuring you choose an option that aligns with your needs and expectations.
Compatibility and Model Fit
Ensure the kit is designed for your specific Harley Davidson model and year. Some kits target particular transmission top covers, requiring confirmation of fit before purchasing. Compatibility issues can lead to installation difficulties or subpar performance, so double-check the manufacturer’s specifications and your bike’s make and model.
Material Quality and Durability
Look for kits made from high-grade materials like aerospace-quality steel or OEM-grade components. These materials offer longer life and better resistance to wear, especially if you ride aggressively or frequently. Cheaper materials may save money upfront but could lead to faster wear or failure, costing more in repairs later.
Ease of Installation
If you are a DIY enthusiast, opt for kits with comprehensive instructions and components that are easy to assemble. Premium kits often come pre-assembled or include detailed guides, reducing installation time and errors. Rebuild kits require more mechanical skill and patience, so consider your experience level before choosing.
Price and Value
Balances your budget against the quality and features offered. Premium kits cost more but provide better precision and longevity, whereas rebuild kits are more affordable but demand higher skill levels. Assess whether the investment aligns with your riding goals and maintenance plans.
Performance and Longevity
Decide if your priority is a simple rebuild, performance enhancement, or a combination of both. High-end kits with precision machining deliver smoother shifts and longer lifespan, ideal for aggressive riding. Rebuild kits restore function but may not improve shifting or durability under demanding conditions.
Frequently Asked Questions
Are 6 speed transmission conversion kits compatible with all Harley Davidson models?
Not all kits are universally compatible with every Harley Davidson model. Many are designed for specific years or transmission styles, especially regarding top cover compatibility. Always verify your bike’s model and year against the kit’s specifications to ensure proper fit before purchasing.
Is installation of a 6 speed conversion kit suitable for beginners?
Installing a 6 speed transmission conversion kit can be challenging, especially for rebuild kits that require mechanical expertise. Premium kits with detailed instructions and pre-assembled components are more beginner-friendly, but in general, some mechanical skill and patience are necessary. Consulting a professional is advisable if you lack experience.
What are the main benefits of upgrading to a 6-speed transmission?
Upgrading to a 6-speed transmission typically results in smoother shifting, improved power delivery, and better fuel efficiency at highway speeds. It can also enhance overall durability, particularly when using high-quality kits, making your Harley more reliable and enjoyable to ride on long trips.
How long does a typical transmission rebuild or conversion take?
The duration varies depending on experience and the kit used. Rebuild kits may take several hours to a full day for experienced mechanics, while premium conversion kits can be quicker if pre-assembled. Always allocate sufficient time and ensure you have proper tools and workspace.
Are there performance differences between rebuild kits and premium conversion kits?
Yes, there are notable differences: premium kits with precision machining and high-grade materials often provide smoother shifts, better durability, and enhanced riding experience. Rebuild kits restore original function but typically do not offer performance improvements, making them ideal for restoration rather than upgrade.
Conclusion
For riders prioritizing performance, durability, and ease of installation, the Jims 8085 6-Speed Precision-Cut Transmission Super Kit is the best choice, especially for high-performance builds. Those restoring older Harley models or on a budget should consider the Jims 6-Speed Transmission Rebuild Kit 1068 or the 2007-2016 rebuild kit, which offer reliable, cost-effective solutions. Novice mechanics or casual riders may prefer premium kits with detailed instructions, while experienced DIYers can confidently opt for rebuild kits to restore their transmission without overspending.
