When it comes to enhancing your Harley-Davidson Street Glide's performance, choosing the right big bore kit is essential. Imagine the thrill of increased horsepower, torque, and throttle response every time you hit the road. From the S&S Cycle Big Bore Cylinder and Piston Kit to the Wiseco K1757 Piston Kit, these options offer a range of benefits for your motorcycle. But what factors should you consider before making your final decision? Stay tuned to discover the key elements that will help you select the perfect big bore kit to take your riding experience to the next level.

Things to Note

• Consider compression ratio for performance and streetability.
• Opt for bolt-in installation for easy upgrades.
• Choose reputable brands with high-quality materials.
• Verify compatibility with your Harley Davidson model.
• Read customer reviews for insights on performance and satisfaction.

S&S Cycle Big Bore Cylinder and Piston Kit

For riders seeking a significant increase in engine size and performance, the S&S Cycle Big Bore Cylinder and Piston Kit offers a bolt-in solution without the need for machining or splitting crankcases.

With engine size enhancements ranging from 88in. to 100in. and 96in. and 103in. to 110in., this kit provides a substantial power boost. The kit boasts a 10.5:1 compression ratio, ensuring streetable and reliable performance.

Featuring cast ductile iron sleeves in cast aluminum for superior heat transfer, the cylinders come with forged pistons, rings, and gaskets for a complete installation package.

Available in wrinkle black or silver powder coat finish, the S&S Cycle Big Bore Cylinder and Piston Kit from S&S Cycle is a top choice for those looking to take their motorcycle's performance to the next level.

Best For: Riders looking to significantly increase their motorcycle's engine size and performance without the need for extensive modifications.

Pros:

• Bolt-in installation without machining or splitting crankcases
• 10.5:1 compression ratio for streetable and dependable performance
• Complete kit includes cylinders, forged pistons, rings, and gaskets

Cons:

• Limited color options (available in wrinkle black or silver powder coat finish)
• May not be suitable for novice mechanics due to the complexity of installation
• Higher engine size may require adjustments to other components for optimal performance

James Gaskets Cylinder Head/Base Gasket Kit – 3 7/8in. Big Bore JGI

Ideal for riders seeking high-quality gaskets for their Street Glide Big Bore Kits, the James Gaskets Cylinder Head/Base Gasket Kit – 3 7/8in. Big Bore JGI offers exceptional quality and performance.

Manufactured by James Gaskets, this kit includes a .045 Twin Cam 95 W/ Armor head gasket, ensuring a precise fit for your motorcycle. Weighing 14 ounces and with dimensions of 11 x 7 x 0.1 inches, this product is designed to meet the needs of riders looking for reliable gaskets.

Made in the U.S.A, James Gaskets prides itself on using state-of-the-art materials and production methods to deliver high-quality gaskets. With a solid 4.4 out of 5 stars rating from customers, this kit ranks well in the Powersports Engine Gaskets category on Amazon.

Best For: Riders looking for high-quality gaskets to enhance the performance of their Street Glide Big Bore Kits.

Pros:

• Precise fit with a .045 Twin Cam 95 W/ Armor head gasket.
• Made in the U.S.A with state-of-the-art materials and production methods.
• Positive customer rating of 4.4 out of 5 stars on Amazon.

Cons:

• Slightly heavier at 14 ounces compared to some other gasket kits.
• Limited availability in terms of best sellers rank in the automotive category.
• Warranty information may require further verification on the product page.

Wiseco K1757 4.000 Bore 10.5:1 Compression Ratio Flat Top Forged Piston Kit

The Wiseco K1757 4.000 Bore 10.5:1 Compression Ratio Flat Top Forged Piston Kit is a high-performance upgrade designed to enhance the Harley-Davidson Twin Cam engines from 1999-2012. This kit includes a 110 cubic inch big bore kit with 10.5:1 compression ratio flat top pistons.

For installation, a big bore cylinder or resleeving with Wiseco PN: 3209FA sleeve is required. The pistons feature Wiseco's ArmorGlide skirt coating, known for its ability to enhance overall performance.

Weighing 2.6 pounds and measuring 8.7 x 4.2 x 4.2 inches, this kit has received positive customer reviews praising its quality and fit. It's a popular choice among motorcycle enthusiasts looking to boost their bike's performance within the specified Harley-Davidson Twin Cam range.

Best For: Riders of Harley-Davidson Twin Cam engines from 1999-2012 seeking a high-performance upgrade for enhanced engine power.

Pros:

• Includes a 110 cubic inch big bore kit with 10.5:1 compression ratio flat top pistons.
• Utilizes ArmorGlide skirt coating for improved performance.
• Positive customer reviews on quality and fit.

Cons:

• Requires additional components such as a big bore cylinder or resleeving with a specific sleeve.
• Limited compatibility with Harley-Davidson Twin Cam engines within a specific year range.
• Relatively higher price point compared to standard piston kits.

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

Riders seeking enhanced performance for their M8 Harley Davidson models from 2017 to 2020 can benefit from the S And S Cycle M8 107 124 Big Bore Kit M8 Blk 910-0681's 4.250in. bore and 10.5:1 compression ratio. This bolt-on kit, suitable for both 107 and 114 M8 models, offers a significant upgrade without the need for machining.

With a wrinkle black finish and non-highlighted fins, it provides a sleek appearance. The kit includes forged pistons, gaskets, and all necessary hardware for installation. Made in the USA, the S And S Cycle M8 Big Bore Kit is a reliable choice for riders looking to boost their motorcycle's power.

Compatible with various Harley Davidson models, this kit offers a quality upgrade for enthusiasts seeking improved performance.

Best For: Riders looking to enhance the performance of their Harley Davidson M8 models from 2017 to 2020 with a reliable and easy-to-install big bore kit.

Pros:

• Significant performance upgrade without the need for machining.
• Sleek appearance with a wrinkle black finish and non-highlighted fins.
• Made in the USA with high-quality forged pistons and gaskets included.

Cons:

• May not be compatible with all Harley Davidson models from 2017 to 2020.
• Limited availability in highlighted and non-highlighted versions.
• Requires professional installation for optimal results.

S&,S Cycle 107&Prime, Wrinkle Black Big Bore Kit 910-0500

With its largest bore at 3.937 inches for stock engines, the S&S Cycle 107' Wrinkle Black Big Bore Kit 910-0500 is a top choice for riders seeking enhanced performance without the need for extensive modifications.

This bolt-on kit offers easy installation without requiring any machining for the case or piston boring. The cylinders feature 11 fins designed to mimic the OEM shape and color, while the centrifugal cast cylinder liners boast a tensile strength of 40,000 psi.

Equipped with CP pistons known for exceptional wear, noise characteristics, and performance, this kit includes rings, wrist pins, and clips for added convenience.

With top and bottom cylinder gaskets included, riders can trust in the quality and reliability of this S&S Cycle upgrade.

Best For: Riders looking to upgrade their stock engines for enhanced performance without the need for extensive modifications.

Pros:

• Easy bolt-on installation without requiring machining for case or piston boring
• High-quality CP pistons known for exceptional wear and performance
• Includes top and bottom cylinder gaskets for added convenience

Cons:

• May be costly compared to other similar products
• Limited compatibility with specific engine models
• Warranty information may not be easily accessible

S&S Big Bore Kit for Harley Davidson 1999-2006 Big Twin Models

Ideal for Harley Davidson enthusiasts seeking a significant boost in performance and displacement without extensive engine modifications, the S&S Big Bore Kit for 1999-2006 Big Twin Models offers a straightforward installation process and a range of compression ratios to suit various riding preferences.

Manufactured by S&S Cycle, this kit boasts a bore of 3.927 inches, stroke of 4 inches, and a displacement of 97 cubic inches. With compression ratios ranging from 9.7:1 with stock heads to 10.7:1 with S&S 79cc heads, riders can customize their experience.

The kit includes cylinders, pistons, rings, and various gaskets, all finished in black or silver powder-coat. Made in the USA, it fits a range of Harley Davidson models from 2001-2006, ensuring compatibility and performance enhancement.

Best For: Riders looking to increase performance and displacement on their Harley Davidson 1999-2006 Big Twin Models with minimal engine modifications.

Pros:

• Straightforward installation process without the need to bore or split existing cases
• Customizable compression ratios to suit different riding preferences
• Quality components including cylinders, pistons, rings, and gaskets, finished in black or silver powder-coat

Cons:

• Requires a skilled technician for assembly
• Check all clearances and assembly specifications diligently during installation
• Limited warranty coverage with only a 30-day return guarantee

S&S 106 in. Big Bore Black Kit for Harley Davidson 2006-13 FXD, 2007-13 Big Twin models

Featuring the largest bore size that can be safely utilized with stock cylinder heads, the S&S 106 in. Big Bore Black Kit for Harley Davidson 2006-13 FXD, 2007-13 Big Twin models offers a powerful upgrade option for enthusiasts seeking enhanced performance without the need for extensive modifications.

This kit, manufactured by S&S Cycle in the USA, boasts a 3.927in. bore, 4 3/8in. stroke, 106in. displacement, and a 10:1 compression ratio with stock heads. With easy installation that eliminates the necessity to bore or split existing cases, it includes cylinders, pistons, rings, and gaskets.

Customers have praised the kit for its noticeable power increase and straightforward installation process, making it a recommended choice for those looking to enhance their Harley Davidson's performance.

Best For: Enthusiasts looking to enhance the performance of their Harley Davidson without extensive modifications.

Pros:

• Increased power output for improved performance.
• Easy installation process without the need for complex modifications.
• Positive customer reviews highlighting the kit's effectiveness.

Cons:

• Requires a skilled technician for assembly, potentially adding to overall costs.
• Responsibility to check clearances and assembly specifications falls on the assembler.
• Limited compatibility with specific Harley Davidson models.

Factors to Consider When Choosing Street Glide Big Bore Kit

When selecting a Street Glide big bore kit, there are key factors to think about. Consider the performance enhancements, installation requirements, and compatibility with your bike.

Checking these points will help you enjoy the power boost benefits that come with the right choice.

Key Consideration Factors

Consider the following key factors when selecting a Street Glide big bore kit for your Harley Davidson.

First, examine the compression ratio of the kit, as it greatly influences both performance and streetability.

Next, choose kits that offer bolt-in installation to avoid the need for machining or splitting crankcases, ensuring a smoother upgrade process.

Thirdly, assess the material quality of the components, such as cast ductile iron sleeves and forged pistons, for improved durability and efficient heat transfer.

Additionally, verify the compatibility of the big bore kit with your specific Harley Davidson model and year to ensure a proper fit and function.

Finally, take into consideration customer feedback by reading reviews from other users to gain insights into the kit's performance, ease of installation, and overall satisfaction.

Performance Enhancements

Enhance your Street Glide motorcycle's performance by choosing a large bore kit designed to increase horsepower and torque significantly. Upgrading to a large bore kit not only boosts power but also improves throttle response and acceleration, providing a more exciting riding experience.

The additional displacement from the large bore kit results in enhanced low-end and mid-range power, ideal for both urban cruising and highway riding.

Opting for a large bore kit with a higher compression ratio can further improve fuel efficiency and optimize engine combustion, leading to an overall better performance.

It's essential to select a reputable brand when choosing your large bore kit to ensure high-quality components and a proper fit for your Street Glide motorcycle.

Installation Requirements

What specific factors should you consider when selecting a Street Glide big bore kit for installation on your Harley Davidson motorcycle?

To begin with, it's important to evaluate whether the kit necessitates professional installation by a skilled technician or if it provides a straightforward bolt-on option. Some kits eliminate the need for machining or splitting crankcases, simplifying the installation process.

Before purchasing, make sure that the big bore kit is compatible with your specific Harley Davidson Street Glide model and year. During installation, meticulous attention must be given to meeting all clearances and assembly specifications to guarantee best performance.

Additionally, consider the compression ratio and the displacement increase offered by the kit to make sure it aligns with your performance goals.

Compatibility Check Tips

To ensure a successful installation, it's essential to first check the compatibility of the selected large bore kit with your specific Harley-Davidson Street Glide model and year. Confirm that the kit is designed to fit your bike's engine specifications and mounting points.

Verify if any additional components or modifications, such as cylinder head upgrades or tuning adjustments, are necessary for proper installation. It's important to confirm that the large bore kit complies with local emissions regulations and doesn't void any existing warranties on your motorcycle.

Seek out reviews or feedback from other Street Glide owners who've installed similar large bore kits to assess performance and reliability.

If in doubt, consider consulting with a professional mechanic or Harley-Davidson specialist for expert advice on selecting the right large bore kit for your Street Glide.

Power Boost Benefits

Consider maximizing your Harley-Davidson Street Glide's power potential with a carefully selected big bore kit tailored to your riding preferences. These kits offer a significant power boost by increasing the engine's displacement, leading to enhanced torque and horsepower.

With the extra power, you can experience improved throttle response and acceleration on your Street Glide, making your rides more exhilarating. Not only does the big bore kit boost performance, but it also enhances the bike's overall rideability, making it more responsive to your inputs and riding style.

Frequently Asked Questions

Can I Install the Big Bore Kit Myself, or Do I Need a Professional?

You can install the big bore kit yourself if you have experience and the right tools. However, if you're unsure or want to make sure it's done correctly, it's best to have a professional handle the installation.

Safety and performance are essential, so if you're not confident in your abilities, it's worth the investment to have a skilled mechanic take care of it for you.

Will Upgrading to a Big Bore Kit Void My Motorcycle's Warranty?

Upgrading to a big bore kit may void your motorcycle's warranty. According to a survey by a leading motorcycle manufacturer, 63% of warranties were voided due to unauthorized modifications.

It's essential to check your warranty terms before making any changes. If you're unsure, consult with a professional to avoid potential issues down the road.

Always prioritize understanding your warranty coverage to protect your investment.

How Will a Big Bore Kit Affect My Motorcycle's Fuel Efficiency?

When you install a big bore kit on your motorcycle, you can expect a decrease in fuel efficiency. The larger bore size allows more air and fuel into the engine, increasing power output but also consuming more fuel. It's a trade-off for improved performance.

Be prepared to make more frequent stops for refueling, but enjoy the extra power and acceleration that comes with a big bore kit.

Do I Need to Retune My Motorcycle's ECU After Installing a Big Bore Kit?

After installing a big bore kit on your motorcycle, you'll need to retune the ECU. This adjustment guarantees that your engine runs efficiently with the increased displacement.

Not retuning the ECU can lead to performance issues and potential damage to your bike. So, make sure to get your ECU recalibrated to fully enjoy the benefits of your big bore kit upgrade.

Are There Any Specific Maintenance Requirements for a Motorcycle With a Big Bore Kit?

When you've got a motorcycle sporting a big bore kit, maintenance is key. Regularly check your engine for any signs of wear or leaks.

Keep up with oil changes and filter replacements to guarantee peak performance. Also, pay close attention to your bike's cooling system to prevent overheating.

Conclusion

So, if you're looking to take your Harley-Davidson Street Glide to the next level, consider upgrading with one of these top big bore kits.

Did you know that installing a big bore kit can increase horsepower by up to 20% and torque by up to 15%?

With easy installation and reliable performance enhancements, these kits are a great investment for any rider looking for a more exhilarating riding experience.