Choosing the right aftermarket carburetor for your Harley Davidson Big Twin can significantly enhance your motorcycle’s performance and reliability. Leading options like the S&S Super E Carburetor and the CV40 Carburetor are popular, but each has its strengths and tradeoffs. The S&S offers premium build quality and durability but may require professional installation. The CV40 provides a straightforward upgrade for models from 1988 to 2017, with easy installation and included accessories. Meanwhile, others like the Super E for older models or complete kits deliver broad compatibility and comprehensive parts, but might demand more mechanical skill or come with limited warranties. This guide helps clarify these differences to match your specific riding needs and technical comfort level.
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Key Takeaways
- The S&S Super E excels in durability and precision fit, ideal for long-term use in specific Harley models.
- The CV40 carburetor offers a hassle-free upgrade with included accessories, suited for riders seeking easy installation.
- Compatibility varies widely; some options cover a broad range of years and models, while others focus on specific Harley Davidson series.
- Installation complexity differs; some kits are straightforward, while others may require professional help or mechanical expertise.
- Price and warranty vary, so balancing budget with long-term reliability is key for making the right choice.
| S&S Super E Carburetor for Harley Davidson Big Twin |  | Best Overall for Durability and Precision Fit | Compatibility: Harley Davidson 1998-2005, Buell 1997-2002 | Material: High-quality aluminum alloy | Features: Corrosion-resistant coating, oxidation, rust resistance | VIEW ON AMAZON | See Our Full Breakdown |
| Super E Carburetor for Harley-Davidson and Buell Models |  | Best Versatility and Tuning Flexibility | Fitment: Harley-Davidson and Buell models 1957-2005 | Includes: Carburetor, intake manifold, fuel filter, spark plug, 5 jets | Part Numbers: 11-0420, 160-1628, 82026, 496564, 35-0471, 1002-0025 | VIEW ON AMAZON | See Our Full Breakdown |
| Carburetor for Harley Davidson Sportster 883/1200, Dyna, FXR Touring, Electra Glide, Softail, Low Rider, Night Train (1988-2017) |  | Best for Wide Model Compatibility | Fitment: Harley-Davidson Sportster 883/1200 (1988-2006), Dyna, FXR Touring, Electra Glide, Softail, Low Rider, Night Train (1988-2017) | Package Includes: 1 carburetor, choke cable, spark plugs, jets | Replace Part Numbers: 27421-99C, 27490-04, 27465-04, 27031-95, 27490-96 | VIEW ON AMAZON | See Our Full Breakdown |
| CV40 Carburetor Compatible with Harley Davidson Sportster, Dyna, FXR, Softail, Touring 1988-2017 |  | Best for Ease of Installation and Accessories | Intake manifold side: 39 mm (inner diameter) / 45 mm (outer diameter) | Air filter intake side: 57 mm (inner diameter) / 67 mm (outer diameter) | Replacement numbers: 27421-99C, 27421-99A, 27490-04, 27465-04, 27031-95, 27490-96, 27492-96 | VIEW ON AMAZON | See Our Full Breakdown |
| Carburetor Replacement for Harley-Davidson Sportster 883 1200 (1988-2006) |  | Best Complete Kit for Easy Installation and Reliability | Model Compatibility: Harley-Davidson Sportster 883, 1200 (1988-2006), Softail, Dyna, FXR, Touring (1988-2017) | Includes: Carburetor, choke cable, fuel filter, spark plugs, jets, fuel lines | Part Number: RNM-E512 | VIEW ON AMAZON | See Our Full Breakdown |
More Details on Our Top Picks
S&S Super E Carburetor for Harley Davidson Big Twin
The S&S Super E stands out thanks to its high-quality aluminum alloy construction, ensuring corrosion resistance and longevity. It’s a direct replacement compatible with Harley models from 1998 to 2005 and Buell bikes, making it a solid choice for those maintaining or upgrading older bikes. The precision machining guarantees a perfect fit, which is critical for optimal performance. Compared with other options, this carburetor offers the best long-term durability but may require professional installation due to its fitment precision. It’s ideal for riders who prioritize reliable, long-lasting performance over DIY simplicity.
Pros:- Durable, corrosion-resistant aluminum construction
- Precision-machined for perfect fit
- Compatible with a wide range of Harley and Buell models
Cons:- Installation may require professional help
- Restricted to specific model years
Best for: Riders seeking a durable, high-quality upgrade that emphasizes longevity and fit precision.
Not ideal for: Those who prefer a quick, DIY-friendly install or have newer Harley models outside the specified years.
- Compatibility:Harley Davidson 1998-2005, Buell 1997-2002
- Material:High-quality aluminum alloy
- Features:Corrosion-resistant coating, oxidation, rust resistance
- Installation:Easy to install, professional help recommended
Our verdict“A top-tier choice for durability and fit, best suited for experienced riders or professionals.”
Super E Carburetor for Harley-Davidson and Buell Models
This Super E carburetor is compatible with Harley and Buell bikes from 1957 to 2005, making it one of the most versatile options. It includes an intake manifold, fuel filter, spark plug, and extra jets, providing a comprehensive package for tuning and maintenance. It’s well-suited for riders who want a durable, adaptable carburetor with multiple jets for fine-tuning. The main tradeoff is that proper installation and tuning are essential to achieve optimal performance—this isn’t a plug-and-play solution. Compared with the S&S, it offers broader compatibility but may require more mechanical skill to dial in correctly.
Pros:- Compatible with a broad range of models
- Includes multiple jets for custom tuning
- Durable construction
Cons:- Requires proper installation and tuning
- Compatibility limited to specific years and models
Best for: Riders who want a flexible, all-in-one tuning solution for a range of Harley and Buell models.
Not ideal for: Beginners or those unwilling to undertake detailed tuning and setup.
- Fitment:Harley-Davidson and Buell models 1957-2005
- Includes:Carburetor, intake manifold, fuel filter, spark plug, 5 jets
- Part Numbers:11-0420, 160-1628, 82026, 496564, 35-0471, 1002-0025
- Material:Durable metal
Our verdict“A highly adaptable choice for experienced tuners seeking broad compatibility and tuning options.”
Carburetor for Harley Davidson Sportster 883/1200, Dyna, FXR Touring, Electra Glide, Softail, Low Rider, Night Train (1988-2017)
This carburetor covers a broad spectrum of Harley models from 1988 to 2017, including Sportster, Dyna, FXR Touring, and Softail series. It includes a choke cable, spark plugs, and jets, making it a convenient replacement for many bikes in this range. While it’s easy to install and provides a reliable upgrade, it doesn’t specify if it’s optimized for performance tuning or long-term durability. Compared with specialized options like the S&S, it offers greater model coverage but may fall short in durability or performance for high-end applications.
Pros:- Compatible with many Harley models
- Includes essential accessories
- Easy to replace
Cons:- No detailed installation guidance
- Limited durability info
- Compatibility limited to specified years
Best for: Owners of Harley models from 1988-2017 looking for a straightforward, compatible replacement.
Not ideal for: Riders seeking a high-performance or long-lasting upgrade beyond basic replacement.
- Fitment:Harley-Davidson Sportster 883/1200 (1988-2006), Dyna, FXR Touring, Electra Glide, Softail, Low Rider, Night Train (1988-2017)
- Package Includes:1 carburetor, choke cable, spark plugs, jets
- Replace Part Numbers:27421-99C, 27490-04, 27465-04, 27031-95, 27490-96
Our verdict“A solid choice for broad compatibility and straightforward replacement needs.”
CV40 Carburetor Compatible with Harley Davidson Sportster, Dyna, FXR, Softail, Touring 1988-2017
The CV40 carburetor is designed for Harley Davidson models from 1988 to 2017, emphasizing straightforward installation and performance enhancement. It includes necessary accessories such as a choke cable, spark plugs, fuel filter, and jets, making it a comprehensive upgrade. Its impact-resistant, anti-corrosion build quality ensures durability. The main advantage over other options is its simplicity, but it may require some mechanical skill to install. It’s best suited for riders who want a reliable, no-fuss upgrade with included parts for customization.
Pros:- Easy installation with clear instructions
- Includes full accessories kit
- High-impact, corrosion-resistant materials
Cons:- Limited to specific Harley models
- May require mechanical skills for optimal fit
- No performance benchmarking info
Best for: Riders seeking an easy-to-install, accessory-rich carburetor upgrade.
Not ideal for: Advanced users wanting high-performance tuning or custom modifications beyond basic replacement.
- Intake manifold side:39 mm (inner diameter) / 45 mm (outer diameter)
- Air filter intake side:57 mm (inner diameter) / 67 mm (outer diameter)
- Replacement numbers:27421-99C, 27421-99A, 27490-04, 27465-04, 27031-95, 27490-96, 27492-96
Our verdict“An excellent choice for riders prioritizing ease and comprehensive accessories in their upgrade.”
Carburetor Replacement for Harley-Davidson Sportster 883 1200 (1988-2006)
This comprehensive kit includes a carburetor, choke cable, fuel filter, spark plugs, jets, and fuel lines, designed for Harley Sportster models from 1988 to 2006. Its all-in-one approach simplifies installation and guarantees compatibility. The kit’s high reliability and long lifespan are appealing, but it’s limited to specific Harley models. The one-year warranty adds peace of mind, though the package may require some mechanical skills for full assembly. Compared with individual carburetors, this kit offers a straightforward, complete upgrade for riders looking for hassle-free installation and dependable performance.
Pros:- All-in-one parts kit for easy replacement
- Includes fuel lines and multiple accessories
- Reliable and long-lasting
Cons:- Limited to specified Harley models
- No extensive user reviews on performance
- Requires basic mechanical skills
Best for: Riders wanting a full replacement kit for Harley Sportster and similar models with easy installation.
Not ideal for: Those seeking high-performance tuning or compatibility beyond 2006 models.
- Model Compatibility:Harley-Davidson Sportster 883, 1200 (1988-2006), Softail, Dyna, FXR, Touring (1988-2017)
- Includes:Carburetor, choke cable, fuel filter, spark plugs, jets, fuel lines
- Part Number:RNM-E512
- Warranty:One year
Our verdict“An excellent, hassle-free solution for Sportster owners seeking a complete replacement set.”
How We Picked
Our selection process centered on compatibility with Harley Davidson Big Twin models, durability, ease of installation, and value. We prioritized products with solid reputations, comprehensive accessories, and positive customer feedback. We examined technical specs, included parts, and user reviews to identify options that balance performance, affordability, and user-friendliness. Products that cater specifically to the Harley Big Twin’s engine characteristics and typical upgrades made the cut, ensuring every recommendation helps riders improve their bike’s performance without unnecessary hassle.
Factors to Consider When Choosing Aftermarket Carburetor For Harley Davidson Big Twin
Choosing an aftermarket carburetor for your Harley Davidson Big Twin involves understanding your model year, riding style, and technical comfort. Compatibility is foundational—ensure the carb matches your bike’s specifications. Durability and ease of installation are also key, especially if you plan to do the work yourself. Consider whether you need a kit with included accessories, or if a more specialized, high-performance option is better suited. Price and warranty coverage matter too, especially for long-term reliability. This guide breaks down these factors to help you pick the best carburetor for your specific Harley Big Twin setup.
Compatibility and Model Range
The first step is matching the carburetor to your Harley’s model year and series. Some options, like the S&S Super E, are designed for specific years (1998-2005), making them ideal for owners of older bikes needing a direct, high-quality upgrade. Others, like the CV40, boast broad compatibility from 1988 to 2017, suitable for a wide range of models. If your bike falls outside these ranges, or if you want maximum flexibility, look for comprehensive kits that include all necessary parts and accessories.
Durability and Material Quality
Durability is vital, especially given the vibrations and exposure to elements on long rides. Carburetors like the S&S Super E are crafted from corrosion-resistant aluminum alloys, offering a long lifespan. Cheaper or generic options might use lower-grade plastics or metals that wear faster. For riders who plan extended use or frequent riding, investing in a high-quality, corrosion-resistant model ensures your upgrade remains reliable over time.
Ease of Installation and Tuning
Some carburetors, such as the CV40, are designed for straightforward installation, often with included accessories and minimal tuning needed. Others, like the Super E or the comprehensive kits, may require more mechanical skill or professional help. If you’re a DIY enthusiast, prioritize models with clear instructions and included parts. For those less mechanically inclined, selecting a kit with full support or professional installation might save time and frustration.
Performance and Tuning Options
If you’re after peak performance, look for options with multiple jets, adjustable features, and proven tuning capabilities. The Super E and similar models with included jets provide flexibility to optimize throttle response and fuel efficiency. Basic replacements may suffice for casual riding, but serious enthusiasts should consider models that allow detailed tuning to extract maximum power and responsiveness from their engine.
Price, Warranty, and Support
Prices vary, with premium models like the S&S Super E commanding higher rates but offering better durability and fit. Kits that include comprehensive parts and support often come at a premium but reduce the hassle of sourcing individual components. Warranty coverage can also be a deciding factor—longer warranties indicate manufacturer confidence and provide peace of mind. Always review customer support options and return policies before purchasing, especially for more expensive upgrades.
Frequently Asked Questions
Can I install an aftermarket carburetor myself?
Installing an aftermarket carburetor can be straightforward if the model is designed for easy replacement and comes with clear instructions. However, some models, especially those requiring tuning or specific adjustments, may demand mechanical skills or professional help to ensure optimal performance. Always review installation guides and consider your own experience level before attempting a DIY upgrade.
Will changing my carburetor improve my Harley’s performance?
Upgrading to a high-quality aftermarket carburetor can enhance throttle response, fuel efficiency, and overall engine performance. However, the extent of improvement depends on proper tuning and compatibility with your bike’s engine setup. For maximum gains, pairing the new carburetor with appropriate tuning and jetting is essential.
Are these carburetors compatible with all Harley Big Twin models?
No, compatibility varies based on model year and series. Some options like the S&S Super E are limited to specific years, while others like the CV40 cover a broad range. Always double-check the product specs and compatibility charts to ensure the carburetor fits your exact motorcycle model.
Do I need professional help to install these carburetors?
While some models are designed for easy installation and can be handled by experienced DIYers, others may require mechanical expertise, especially if tuning or rejetting is involved. For complex installations or if you’re uncertain about the process, consulting a professional can prevent issues and ensure your bike runs optimally.
What should I consider when choosing a carburetor for my Harley?
Key factors include compatibility with your model and year, durability of materials, ease of installation, tuning flexibility, and your budget. Higher-end models often provide better long-term reliability, but may require more initial investment. Consider your riding style and technical comfort level to select the best option for your needs.
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