If you're aiming to boost your Softail's performance, exploring the field of big bore kits is a wise move. These kits can elevate your motorcycle's horsepower, torque, and overall performance. From the S&S Cycle 4 Bolt in Sidewinder Big Bore Cylinder and Piston Kit to the 1550 Gasket Set for Harley-Davidson Motor, a plethora of options awaits. So, which kit will truly elevate your riding experience to the next level? Stay tuned to discover the key features and benefits that make these top 7 big bore kits stand out from the rest.

Things to Note

• Consider S&S Cycle 4 Bolt in Sidewinder for reliable performance upgrades.
• Opt for S&S Cycle 117TC Cylinder Kit for increased power and durability.
• Choose 1550 Gasket Set for Harley-Davidson Motor for quality seal and fit.
• Explore features of Harley Davidson FXSTC Custom Cast Piston Kit for enhanced performance.
• Verify compatibility and warranty for a smooth installation and long-term benefits.

S&S Cycle 4 Bolt in Sidewinder Big Bore Cylinder and Piston Kit

For riders seeking a significant increase in engine size and performance without the need for extensive modifications, the S&S Cycle 4 Bolt in Sidewinder Big Bore Cylinder and Piston Kit offers a straightforward bolt-in solution.

The kit boasts a cast ductile iron sleeve in cast aluminum, ensuring superior heat transfer. Engine size upgrades range from 88in. to 100in. to 110in. for 96in. and 103in. engines. With a compression ratio of 10.5:1, this kit provides streetable and dependable performance.

Complete with cylinders, forged pistons, rings, and gaskets, riders can expect an inclusive package. Available in wrinkle black or silver powder coat finish, the S&S Cycle kit combines ease of installation with a significant boost in power and performance.

Best For: Riders looking to increase engine size and performance significantly with a simple bolt-in solution.

Pros:

• Straightforward bolt-in installation without the need for machining or splitting crankcases.
• Superior heat transfer with a cast ductile iron sleeve in cast aluminum construction.
• Complete kit includes cylinders, forged pistons, rings, and gaskets for a comprehensive upgrade.

Cons:

• Limited options in terms of color finishes (only available in wrinkle black or silver powder coat).
• May not be compatible with all motorcycle models, requiring compatibility checks.
• Higher compression ratio of 10.5:1 may require tuning for optimal performance.

S And S Cycle M8 Models W/107 124 In124 Big Bore Kit M8 Blk 910-0681 New

Ideal for riders seeking maximum performance upgrades, the S And S Cycle M8 Models W/107 124 In124 Big Bore Kit M8 Blk 910-0681 offers a bolt-on solution with a 4.250in. bore and a 10.5:1 compression ratio.

This kit is designed for both 107 and 114 M8 models, providing a wrinkle black finish with non-highlighted fins for a sleek look. Featuring forged pistons and the largest bore possible without machining, it includes gaskets and required hardware for easy installation.

Made in the USA, this kit is compatible with various Harley Davidson models from 2017 to 2020, catering to riders looking to enhance their bike's performance. With positive customer reviews and a sturdy build, the S And S Cycle M8 Big Bore Kit is a reliable choice for riders wanting to elevate their riding experience.

Best For: Riders seeking maximum performance upgrades for their Harley Davidson models from 2017 to 2020.

Pros:

• Bolt-on solution with easy installation.
• Largest bore possible without machining.
• Made in the USA with forged pistons.

Cons:

• Limited compatibility with specific Harley Davidson models.
• Non-highlighted fins may not appeal to all riders.
• Higher compression ratio may require additional tuning for optimal performance.

S&S Cycle Cylinder Kit 117Tc Gray 910-0474

Catering to riders seeking enhanced power and performance, the S&S Cycle Cylinder Kit 117Tc Gray 910-0474 offers a straightforward installation process without the need for case modifications.

This big bore kit is designed to deliver excellent results when paired with stock cylinder heads, providing a hassle-free upgrade for increased performance. The premium aluminum castings with cast-in iron liners guarantee durability and reliability, while the kit includes cylinders, pistons, rings, and gaskets for a complete solution.

Available in a sleek black or silver powder-coat finish, this kit is proudly made in the USA by S&S Cycle, a trusted manufacturer in the industry. Riders can expect a quality product that's backed by warranty support and the confidence of skilled technician assembly requirements.

Best For: Riders looking to boost power and performance without extensive modifications to their motorcycle's engine.

Pros:

• Hassle-free installation without the need to bore or split existing cases.
• Premium aluminum castings with cast-in iron liners ensure durability and reliability.
• Complete kit includes cylinders, pistons, rings, and gaskets for a comprehensive upgrade solution.

Cons:

• Not suitable for Twin Cooled motors.
• Skilled technician assembly requirement may add to overall cost.
• Clearances and assembly specifications need to be carefully checked during installation.

1550 Gasket Set for Harley-Davidson Motor 1550 Twin Cam 95CI

Designed for riders seeking improved performance, the 1550 Gasket Set for Harley-Davidson Motor 1550 Twin Cam 95CI offers a complete kit for upgrading various models from 1999 to 2006.

This gasket set is specifically tailored to fit Harley-Davidson 1550 95CI Twin Cam engines found in models such as Dyna, Electra Glide, Fat Boy, Heritage Softail, Softail Springer, and Street Glide.

The package includes essential components like .030 Thick Head Gaskets, O-Ring Cylinder Bases, Rocker cover bases, O-ring Pushrod tube centers, and more.

With high-quality materials and easy installation, this set guarantees a reliable upgrade for compatible Harley-Davidson motorcycles, providing riders with the assurance of a well-maintained engine for peak performance.

Best For: Riders looking to upgrade their Harley-Davidson motorcycles with a reliable and high-quality gasket set tailored for 1550 Twin Cam 95CI engines from 1999 to 2006.

Pros:

• Complete kit for upgrading various Harley-Davidson models.
• High-quality materials ensure durability and performance.
• Easy installation process for convenience.

Cons:

• One of the new gaskets may have a slight leak.
• Compatibility verification required for specific models.
• Limited to Harley-Davidson 1550 95CI Twin Cam engines from 1999 to 2006.

S&S Cycle 910-0182 3 1/2in. Bore Cylinder and Piston Kit – Wrinkle Black

With its 3 1/2in. bore cylinders and forged pistons, the S&S Cycle 910-0182 kit in wrinkle black finish offers riders seeking maximum performance a robust upgrade option.

This kit includes S&S 3 1/2in. bore (80in.) cylinders, forged pistons, rings, wrist pins, head and base gaskets, making it a complete solution for engine enhancement.

The flat-topped cast pistons are compatible with stock or S&S Performance Replacement heads, boasting an 8.8:1 compression ratio.

Additionally, the cylinders are available in either a natural or wrinkle black powder coat finish, providing riders with aesthetic choices to suit their preferences.

Overall, the S&S Cycle 910-0182 kit combines quality components and design for riders looking to elevate their Softail's performance capabilities.

Best For: Riders looking to maximize performance upgrades on their Softail motorcycles with a complete and high-quality cylinder and piston kit.

Pros:

• Includes all necessary components for a comprehensive engine enhancement solution
• Compatible with both stock and S&S Performance Replacement heads
• Available in a choice of natural or wrinkle black powder coat finish for customization

Cons:

• May require professional installation for optimal performance
• Higher compression ratio may necessitate additional modifications for optimal tuning
• Limited compatibility with certain engine configurations

S And S Cycle 17-18 M8 Models Big Bore Cylinder Set Blk 910-0683 New

For riders seeking improved performance and power on their 2017-2018 M8 Harley Davidson models, the S&S Cycle 17-18 M8 Models Big Bore Cylinder Set Blk 910-0683 offers a bolt-on solution. This kit features a 4.250in. bore size and forged pistons. Available for both 107 and 114 M8 models, it comes in highlighted and non-highlighted versions with a wrinkle black finish.

The cylinders in this set feature non-highlighted fins and are designed to be a direct replacement without the need for machining. With a 10.5:1 compression ratio, the forged pistons ensure durability and improved performance. Made in the USA, this product includes gaskets and necessary hardware, making it a complete upgrade for various Harley Davidson models from 2017 to 2020.

Best For: Riders looking to enhance the performance and power of their 2017-2018 M8 Harley Davidson models with a convenient bolt-on solution.

Pros:

• Easy installation as a bolt-on kit without the need for machining.
• Includes gaskets and required hardware for a complete upgrade.
• Made in the USA, ensuring quality and reliability.

Cons:

• Limited compatibility with specific Harley Davidson models from 2017 to 2020.
• May require professional installation for optimal performance.
• Higher compression ratio may require additional tuning for optimal results.

Harley Davidson FXSTC Softail Custom Cast Piston Kit

The Harley Davidson FXSTC Softail Custom Cast Piston Kit by KB Performance offers riders seeking enhanced performance a reliable solution with its Hypereutectic T5 aluminum alloy pistons and 8.7:1 compression ratio. This kit, designed for the 1993 Harley Davidson FXSTC Softail Custom with an 80ci. engine, features .010in. oversize pistons to 3.508in.

Included in the kit are two cast pistons, a set of Hastings moly rings, and piston pin clips. Manufactured by United Engine & Machine Co, this kit weighs 2 pounds and has dimensions of 8 x 5 x 5 inches. The manufacturer part number is KB258.010, and it's also known under the OEM part number KB258.010.

Riders can benefit from the kit's easy installation with provided instructions and the option for product warranty.

Best For: Riders looking to upgrade their 1993 Harley Davidson FXSTC Softail Custom with enhanced performance and durability.

Pros:

• High-quality Hypereutectic T5 aluminum alloy pistons
• Includes a set of Hastings moly rings for improved sealing
• Easy installation with provided instructions

Cons:

• Limited warranty information available
• May not be compatible with all Harley Davidson models
• Higher compression ratio may require additional tuning for optimal performance

Factors to Consider When Choosing a Softail Big Bore Kit

When selecting a Softail big bore kit, you should carefully consider factors such as:

• Available bore sizes
• Compression ratio options
• Installation requirements
• Material and finish
• Compatibility with your specific Harley Davidson model

These aspects will play an essential role in determining the performance gains and overall satisfaction you derive from your upgrade.

Take the time to research and evaluate each factor to make the best choice for your bike.

Kit Bore Sizes

Consider key factors when selecting a Softail big bore kit, such as the bore sizes available and their implications for performance enhancement.

Softail big bore kits come in various bore sizes, like 3 1/2 inches (80 cubic inches) or 4.250 inches, aiming to boost engine displacement. The larger the bore size in the kit, the more power and torque your Softail motorcycle could potentially gain.

These bore sizes are meticulously crafted to match specific Softail models and years, ensuring compatibility and peak performance. To choose the right bore size, weigh the desired performance improvements against your bike's current setup.

Being knowledgeable about the bore size options in big bore kits empowers riders to make well-informed decisions for enhancing their Softail motorcycles' performance. Make sure to select a bore size that aligns with your performance goals and complements your bike's existing components for the best results.

Compression Ratio Options

Factors to evaluate when selecting a Softail big bore kit include the available compression ratio options tailored to different performance preferences.

Compression ratio plays a significant role in engine performance, with higher ratios typically yielding more power but necessitating the use of high-octane fuel and precise tuning. On the other hand, lower compression ratios are better suited for street riding due to their increased tolerance for variations in fuel quality and tuning.

It's essential to grasp how compression ratio impacts engine behavior to make an informed decision when choosing a big bore kit. Consulting with a knowledgeable professional or conducting thorough research is essential in determining the most suitable compression ratio for your specific riding style and bike setup.

Installation Requirements

To guarantee a successful setup of a Softail big bore kit, understanding the necessary tools and mechanical proficiency is vital. Softail big bore kits typically require basic mechanical knowledge and tools for installation. Some kits may need additional components or modifications for proper installation, so it's important to follow the manufacturer's instructions carefully.

Before purchasing a big bore kit, consider the compatibility with your specific Softail model to avoid any issues during installation. For more complex installations, it's recommended to opt for professional installation by a certified mechanic or technician to make sure everything is set up correctly.

Material and Finish

When selecting a Softail big bore kit, the choice of material and finish greatly influences both performance and longevity. The material of the cylinders and pistons in the kit plays a significant role in how well your bike will perform and how long the components will last.

Opting for high-quality materials like aluminum and ductile iron guarantees efficient heat transfer and reliability, crucial for maximizing performance. Additionally, the finish on the cylinders isn't just about aesthetics but also affects heat dissipation and overall engine performance.

Finishes such as wrinkle black or silver powder coat not only enhance the look of your bike but also provide protection against corrosion, increasing the longevity of the components. When choosing a finish, make sure it complements your bike's style while emphasizing durability and longevity.

Compatibility With Models

Consider the specific Harley Davidson Softail model you own when selecting a big bore kit to guarantee ideal fit and performance. Confirm that the kit is designed for your exact model to avoid compatibility issues.

Check that the big bore kit matches your engine size and generation to ensure a smooth installation process. It's essential to verify that all necessary components are included in the kit to prevent the need for additional parts.

Additionally, look for kits that are compatible with your current exhaust, intake, and fuel management systems to maintain peak performance levels. Keep in mind that some kits may require additional modifications or tuning for you to fully leverage the benefits on your Softail model.

Warranty Details

Check the warranty coverage of the big bore kit to ensure protection against defects or malfunctions. It's crucial to know the duration of the warranty to comprehend how long you're covered for potential issues with the kit.

Look for specifics on what the warranty covers, such as parts, labor, or particular components of the kit. It's vital to understand any conditions or requirements that must be met to keep the warranty valid.

Consider the reputation of the manufacturer or brand in honoring warranty claims for peace of mind. By examining these warranty details, you can make an informed decision when selecting a Softail big bore kit.

Remember that a solid warranty can provide you with the necessary protection and support in case any problems arise with the kit after installation.

Price Matching Option

Wondering how price matching options can impact your decision when selecting a Softail big bore kit?

Price matching allows you to report lower prices found elsewhere for the same product, ensuring competitive pricing and customer satisfaction.

By providing details of lower prices from online or offline stores, you open the door to adjustments in pricing to match or beat competitors.

This feature promotes transparency and fair pricing practices in the market, giving you the confidence that you're getting the best deal possible on your big bore kit.

When considering a Softail big bore kit, the availability of a price matching option can be a key factor in your decision-making process.

It not only helps you save money but also guarantees that you're investing in a product that offers value for your hard-earned cash.

Make sure to inquire about price matching options when exploring different big bore kit options to maximize your benefits.

Frequently Asked Questions

Can These Big Bore Kits Be Installed at Home or Require Professional Installation?

You can install these big bore kits at home if you have the right tools and experience. However, professional installation is recommended for precise work and to avoid potential issues.

Make sure to follow the manufacturer's instructions carefully and take your time with the installation process.

If you're confident in your skills, DIY installation can be a rewarding experience, but if in doubt, it's best to seek professional help for a smooth setup.

Will Upgrading to a Big Bore Kit Void My Harley-Davidson Warranty?

So, you're wondering if jumping on that big bore kit bandwagon will put your Harley-Davidson warranty in jeopardy?

Well, here's the deal: upgrading to a big bore kit can indeed void your warranty. Manufacturers often frown upon modifications that mess with the original specs.

It's like giving your bike a new identity that the warranty folks mightn't approve of.

Be cautious before taking the plunge!

Are There Any Specific Tuning or Fuel Management Requirements for These Kits?

When upgrading to a big bore kit, it's important to take into account specific tuning and fuel management requirements. These kits may necessitate adjustments to achieve peak performance and prevent issues.

Tuning your motorcycle correctly and using the right fuel management system can help maximize the benefits of the big bore kit. Be sure to follow manufacturer recommendations to steer clear of any potential problems and keep your bike running smoothly.

What Is the Expected Increase in Horsepower and Torque With These Big Bore Kits?

Imagine the power surge you'll feel with these big bore kits! You can expect a significant increase in both horsepower and torque. Your bike will roar to life with a noticeable boost in performance.

These kits are designed to maximize your riding experience, providing you with the power and acceleration you crave. Get ready to feel the raw energy and excitement as you hit the road with these upgrades!

Can I Use My Existing Exhaust System With These Big Bore Kits, or Will I Need to Upgrade?

You may need to upgrade your current exhaust system when installing big bore kits to maximize performance.

The increased power and torque generated by these kits can put a strain on stock exhaust systems, limiting their capacity to effectively handle the enhanced performance.

Upgrading to a system that can manage the extra airflow and power output will guarantee that you fully benefit from the big bore kit modifications.

Conclusion

To sum up, when it comes to enhancing the performance of your Softail motorcycle, choosing the right big bore kit can make a significant difference in horsepower, torque, and overall riding experience.

With options like the S&S Cycle 4 Bolt in Sidewinder Big Bore Cylinder and Piston Kit, you can achieve maximum performance and enjoy the thrill of improved acceleration.

So, why wait? Upgrade your Softail today and feel the power beneath you!