USA Motorcycling

Did you know that upgrading your Harley-Davidson Fat Bob with a big bore kit can greatly enhance its performance and durability? Explore the top 7 kits available on the market, each offering unique features and benefits to take your riding experience to the next level. From improved engine oil flow to easy bolt-on solutions, these kits cater to various preferences and requirements. Find out which kit suits your Fat Bob best and discover how you can elevate your Harley-Davidson experience with a simple upgrade.

Key Takeaways

• Cam Plate 06DYNA 07-12TC increases oil flow for improved lubrication and lower engine temperature.
• S And S Cycle M8 Models Big Bore Kit offers easy bolt-on installation with a sleek finish.
• S&S Cycle Cylinder Kit 117Tc provides a straightforward installation process without case modifications.
• S And S Cycle 17-18 M8 Models Cylinder Set features a bolt-on design with high-quality forged pistons.
• Motorsports Big Bore Kit for Honda XR100 offers a comprehensive upgrade package for various Honda models.

CAM PLATE 06DYNA 07-12TC

The CAM PLATE 06DYNA 07-12TC in the Fat Bob Big Bore Kits for Harley-Davidson is ideal for riders seeking increased engine oil flow, improved bearing lubrication, and reduced engine temperature.

This cam plate, designed for 06DYNA 07-12TC models, serves as a block-off plate for gear drive cams, enhancing engine performance. Crafted from 7075 billet aluminum, it offers tighter cam bearing bore tolerance and includes a pressure relief valve to boost volume and pressure.

By increasing oil flow and volume while improving oil distribution to bearings, this cam plate not only enhances the overall engine lubrication but also contributes to lowering the engine temperature.

Compatible with Feuling oil pumps, it comes with a bearing retainer plate and necessary hardware for easy installation.

Best For: Riders of 06DYNA 07-12TC Harley-Davidson models looking to enhance engine oil flow, bearing lubrication, and reduce engine temperature.

Pros:

• Increased engine oil flow and volume
• Improved bearing lubrication
• Decreased engine temperature

Cons:

• Requires Feuling HP+ or Race Series oil pump
• Specific to 06DYNA 07-12TC models only
• Higher initial investment due to specialized design

https://www.amazon.com/dp/B007EDSWYW?tag=theseasonedwr-20

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

Ideal for riders seeking enhanced performance and power without the need for extensive modifications, the S And S Cycle M8 Models W/107 124 In124 Big Bore Kit in wrinkle black finish offers a bolt-on solution for select Harley-Davidson models.

This kit is designed for both 107 and 114 M8 models, featuring a 4.250in. bore with forged pistons and a 10.5:1 compression ratio. The wrinkle black finish adds a sleek look to the engine, with non-highlighted fins for a subtle yet stylish appearance.

With gaskets and required hardware included, installation is made easier. Made in the USA, this kit is compatible with various Harley-Davidson models from 2017 to 2020, including Deluxe, Fat Boy, Heritage Classic, Road King, and Street Glide.

Best For: Riders looking to boost the performance of their Harley-Davidson models from 2017 to 2020 without the need for extensive modifications.

Pros:

• Bolt-on kit for easy installation.
• Features a sleek wrinkle black finish.
• Compatible with a range of Harley-Davidson models.

Cons:

• May not be compatible with all Harley-Davidson models.
• Limited availability for specific M8 models.
• Higher compression ratio may require additional tuning.

https://www.amazon.com/dp/B07N9JZPRQ?tag=theseasonedwr-20

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

Best suited for Harley-Davidson enthusiasts looking to enhance their bike's performance, the S&S Cycle Cylinder Kit 117Tc Gray 910-0474 offers a straightforward installation process without the need for boring or splitting cases. This big bore kit, designed for stock cylinder heads, features premium aluminum castings with iron liners for durability.

The kit includes cylinders, pistons, rings, and gaskets, all coated in a stylish black or silver powder finish. Manufactured in the USA by S&S Cycle, this model weighs 24.3 pounds and comes with a manufacturer part number of 910-0474.

While installation requires a skilled technician to ensure proper clearances and specifications are met during assembly, the S&S Cycle Cylinder Kit 117Tc Gray 910-0474 provides a reliable and powerful upgrade option for Harley-Davidson motorcycles.

Best For: Harley-Davidson enthusiasts seeking enhanced performance without extensive modifications.

Pros:

• Straightforward installation process without boring or splitting cases.
• Premium aluminum castings with iron liners for durability.
• Stylish black or silver powder-coat finish for added aesthetic appeal.

Cons:

• Requires a skilled technician for proper installation.
• Responsibility to ensure clearances and specifications during assembly.
• Limited compatibility with specific Harley-Davidson models.

https://www.amazon.com/dp/B00T6J2AF4?tag=theseasonedwr-20

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

Featuring a bolt-on kit with the largest bore possible without machining required, the S&S Cycle 17-18 M8 Models Big Bore Cylinder Set Blk 910-0683 is an exceptional choice for Harley-Davidson riders seeking significant performance upgrades.

This cylinder set is designed for both 107 and 114 M8 models and comes in a sleek wrinkle black finish with non-highlighted fins, adding a stylish touch to your bike. With a bore size of 4.250 inches, forged pistons, and a compression ratio of 10.5:1, this set is crafted in the USA to guarantee high-quality. Additionally, it includes gaskets and installation hardware for convenience.

Compatible with various Harley Davidson models, this cylinder set offers a potent combination of power and style for riders looking to enhance their riding experience.

Best For: Riders looking to upgrade the performance and style of their Harley-Davidson 17-18 M8 models without the need for extensive machining.

Pros:

• Bolt-on kit for easy installation without machining required
• Stylish wrinkle black finish with non-highlighted fins
• High-quality construction with forged pistons and 10.5:1 compression ratio

Cons:

• Limited compatibility with specific Harley-Davidson models
• Relatively high product weight at 26.6 pounds
• May not be suitable for riders seeking subtle or minimal upgrades

https://www.amazon.com/dp/B07PQX3GJV?tag=theseasonedwr-20

Motorsports Big Bore 58mm 120cc Cylinder Piston Top End Kit & Camshaft for Honda XR100 XR100R CRF100 CRF100F 1981-2017

Standing out for its compatibility with various Honda models spanning from 1981 to 2013, the Motorsports Big Bore 58mm 120cc Cylinder Piston Top End Kit & Camshaft offers a complete upgrade solution for enthusiasts seeking enhanced performance.

This kit, including components such as the cylinder, piston, rings, cam, rocker arms, gasket, and more, is designed for Honda CRF100F (2004-2009, 2011-2013), XR100 (1981-1984), and XR100R (1985-2004) models.

Manufactured by MOTO1988, it weighs 4.69 pounds and has dimensions of 8.35 x 7.68 x 7.2 inches. With a solid rating of 4.3 out of 5 stars from 7 customer reviews, this kit is ranked #120 in Powersports Engine Kits on Amazon.

It provides enthusiasts with a reliable aftermarket option for boosting their Honda's performance.

Best For: Enthusiasts looking to upgrade and boost the performance of their Honda XR100, XR100R, or CRF100F models from 1981 to 2013.

Pros:

• Comprehensive kit includes various components for a complete upgrade solution.
• Compatible with a range of Honda models over several years.
• Positive customer reviews and a solid rating indicate user satisfaction.

Cons:

• Limited compatibility beyond 2013 Honda models.
• May require technical expertise for installation.
• Higher price point compared to basic maintenance parts.

https://www.amazon.com/dp/B0B5JS541G?tag=theseasonedwr-20

Vitos 240cc Blaster Big Bore Kit

For riders seeking enhanced power output and performance on Yamaha models like RAPTOR 660 and YFZ450, the Vitos 240cc Blaster Big Bore Kit offers a substantial upgrade. This kit, part number CY240K from Vitos Performance, is compatible with various Yamaha models including RAPTOR 700, BANSHEE, BLASTER 200, and YFZ450. It comes with a 240cc cylinder kit, oversized head, piston with rings and bearings, studs, re-jet kit, and top end gasket kit.

The Vitos 240cc Blaster Big Bore Kit features high performance port timing and a proven dyno-tested power increase of 34hp or more. The kit also features triple exhaust, four intake ports, and can be used with 3mm stroker crankshafts. Customers have praised its easy installation process and reported positive feedback on performance gains, making it a popular choice for Yamaha enthusiasts.

Best For: Riders seeking significant power enhancements for their Yamaha models such as RAPTOR 660 and YFZ450.

Pros:

• Offers proven dyno-tested power increase of 34hp or more
• Easy installation process praised by customers
• Compatible with various Yamaha models and can be used with 3mm stroker crankshafts

Cons:

• May require additional tuning and adjustments for optimal performance
• Some customers reported needing additional support during installation
• Higher power output may lead to increased wear and maintenance requirements

https://www.amazon.com/dp/B00EEIAX1A?tag=theseasonedwr-20

Adefol 52mm Cylinder Piston Kit for Husqvarna Chainsaw

The Adefol 52mm Cylinder Piston Kit for Husqvarna Chainsaw offers a thorough replacement solution for users of compatible chainsaw models seeking increased power and performance. Designed to fit Husqvarna chainsaws 362, 365, 371, 372, 372XP, and 375K, this kit replaces OEM # 503 93 93 72, 503939372.

It includes essential components like a 52mm Cylinder Piston Kit, Spark Plug, Needle Bearing, Gaskets, Oil Seals, Bolts, Valve, and Repair Kit. While some users have reported damaged products, overall feedback praises the kit for its power enhancement.

Adefol prioritizes customer satisfaction with a 90-day hassle-free return policy and money-back guarantee. For those looking to boost their chainsaw's performance, the Adefol 52mm Cylinder Piston Kit presents a viable option with positive installation experiences and performance improvements.

Best For: Users of compatible Husqvarna chainsaw models seeking increased power and performance without compromising quality.

Pros:

• Comprehensive kit with essential components for a thorough replacement solution
• Positive feedback on power enhancement and performance improvement
• Hassle-free return policy and money-back guarantee for customer satisfaction

Cons:

• Some reports of damaged products affecting overall user experience
• Mixed reviews on durability and quality compared to original parts
• Compatibility check advised, which may require additional assistance and time

https://www.amazon.com/dp/B07Z5VXZMD?tag=theseasonedwr-20

Factors to Consider When Choosing the Fat Bob Big Bore Kit

When selecting a Fat Bob Big Bore Kit, you'll want to focus on key features like performance enhancement and compatibility.

Check for any specific installation tips provided and review the warranty information for added peace of mind.

Key Kit Features

Consider these key factors to help you choose the ideal Fat Bob Big Bore Kit for your Harley-Davidson motorcycle. Start by evaluating the bore diameter and compression ratio offered by the kit as these greatly impact performance.

Make sure that the kit includes all necessary components such as cylinders, pistons, rings, gaskets, and hardware for a smooth installation process. It's essential to determine if the kit requires any machining or modifications to the engine cases for compatibility with your Harley-Davidson model.

Additionally, check whether the big bore kit is specifically tailored for your motorcycle model or engine type to ensure proper fitment.

Finally, evaluate the material quality, finish, and manufacturing standards of the components included in the kit. Choose high-quality materials and superior manufacturing standards to guarantee durability and longevity of the upgraded components on your Harley-Davidson.

Performance Enhancement

Improve your Harley-Davidson motorcycle's performance by selecting a Fat Bob Big Bore Kit that boosts engine displacement and power output. By increasing the engine's displacement, these kits can significantly enhance power output and torque, leading to improved throttle response, faster acceleration, and overall enhanced engine efficiency.

Upgrading to a larger bore kit can result in noteworthy gains in horsepower and torque, elevating the bike's overall performance capabilities. The increased displacement from a big bore kit can deliver a noticeable difference in power delivery, enhancing the bike's overall riding experience.

It's crucial to note that the actual performance gains achieved from a big bore kit may vary depending on the specific components used, tuning adjustments made, and the overall condition of your motorcycle.

When considering a Fat Bob Big Bore Kit, keep in mind that these enhancements can transform your Harley-Davidson's performance, providing a thrilling and exhilarating ride.

Compatibility Check

To ensure a smooth upgrade, verify the compatibility of the Fat Bob Big Bore Kit with your specific Harley Davidson Fat Bob model and year. It's important to verify that the kit is designed to fit your motorcycle without any issues.

Additionally, check if any extra modifications or upgrades are necessary for the proper installation of the big bore kit. Confirm whether the kit includes all the essential components such as cylinders, pistons, gaskets, and hardware required for a complete upgrade.

It's vital to ascertain if the big bore kit is intended to work with the stock components or if aftermarket parts are needed for peak performance. To make an informed decision, look for user reviews or seek expert recommendations to validate the compatibility and performance of the Fat Bob Big Bore Kit.

Doing so will help you choose the right kit that seamlessly integrates with your Harley Davidson Fat Bob.

Installation Tips

When choosing a Fat Bob Big Bore Kit for your Harley-Davidson, prioritize adherence to the manufacturer's instructions and torque specifications for a successful installation process.

Make sure you check for proper clearances and fitment before final assembly to prevent any issues down the line.

It's vital to utilize quality tools and equipment during the installation to avoid damaging any components.

Additionally, consider pre-oiling components to guarantee proper lubrication before starting the engine, promoting longevity and peak performance.

If you encounter any uncertainties or complexities during the installation process, don't hesitate to seek professional assistance. Getting expert help can prevent costly mistakes and ensure that the installation is done correctly.

Warranty Information

Considering the warranty information for a Fat Bob Big Bore Kit is important when choosing the right kit for your Harley-Davidson. Before making a purchase, carefully review the duration of the warranty to make sure you have ample coverage in case of any issues.

It's vital to understand what the warranty covers – whether it includes parts, labor, or specific components. Be sure to read through the terms of the warranty to identify any exclusions or conditions that may impact your coverage.

Additionally, check for information on warranty support and customer service availability. Having a clear understanding of the warranty provided with the big bore kit will help you make an informed decision and give you peace of mind regarding potential defects or malfunctions.

Make sure you're comfortable with the level of protection offered before proceeding with your purchase.

Price Matching Instructions

Make certain you collect valid proof of a lower price from a competitor when considering price matching for the Fat Bob Big Bore Kit. Having concrete evidence of the competing offer is vital for the process.

Additionally, check whether the product must be identical to qualify for price matching. Some stores might've specific criteria, like excluding clearance or limited quantity items from price matching eligibility.

When it comes to online price matching, be prepared to provide the competitor's website URL, date, and price details for verification purposes. It's crucial to review the retailer's price matching policy thoroughly before submitting a request to make sure you meet all the necessary requirements.

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 mechanical skills and experience working on motorcycles. However, if you're uncertain or not confident in your abilities, it's best to have a professional handle the installation.

This will guarantee the task is done correctly and safely, avoiding any potential issues that could arise from improper installation. It's always better to be cautious when it comes to significant upgrades like a big bore kit.

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

Upgrading to a big bore kit may void your Harley-Davidson warranty. It's like walking a tightrope without a safety net.

Manufacturers often frown upon aftermarket modifications that could impact the bike's original design. To be safe, review your warranty terms carefully or consult with a dealership to understand the potential impacts of upgrading.

It's better to be safe than sorry when it comes to protecting your investment.

Are There Any Additional Modifications Required for the Installation?

When installing a big bore kit on your Harley-Davidson, you may need additional modifications depending on the specific kit and your bike's existing setup. Some kits may require changes to fuel delivery, exhaust, or other components for best performance.

To ensure everything is installed correctly and functions as intended, it's crucial to carefully read the instructions provided with the kit and consult with a knowledgeable mechanic.

How Will a Big Bore Kit Affect the Performance of My Harley-Davidson?

Installing a big bore kit in your Harley-Davidson will release a new level of power and performance.

Like a symphony conductor bringing out the best in every instrument, the big bore kit will harmonize with your bike's engine, enhancing its overall capabilities.

You'll feel a significant boost in horsepower and torque, resulting in a thrilling ride that will make you stand out on the road.

Get ready to experience a whole new level of exhilaration!

What Kind of Maintenance Is Required After Installing a Big Bore Kit?

After installing a big bore kit on your Harley-Davidson, regular maintenance is vital. You'll need to pay close attention to your bike's oil levels, as the increased power output can put more strain on the engine.

It's recommended to change the oil more often and keep an eye on any unusual sounds or vibrations that could indicate issues. Regular check-ups and tune-ups will help guarantee your bike continues to perform at its best.

Conclusion

So there you have it – the top 7 fat bob big bore kits to take your Harley-Davidson to the next level. Whether you're looking for increased performance, enhanced durability, or an all-encompassing upgrade, these kits have you covered.

Imagine cruising down the open road with a smoother, more powerful ride thanks to your new big bore kit.

Upgrade your Fat Bob today and experience the difference for yourself.