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S&S Cycle 107 in. big bore kits are easy to install and require no machining or re-balancing. These are the largest bores that can be fit in your stock engine case. This is the largest bore that can be fit in a stock engine case. Stock engine height is maintained so there are no manifold or frame fitment issues. Using an 11-fin design, the pre-finished cylinders closely resemble the OEM shape and are ready to install. Take your stock engine case as big as it'll go with S&S Cycle 107 in. big bore kits! Product features include: * CP pistons feature a 3cc pop-up dome for slightly higher compression * Cylinders feature an increased fin area for better heat dissipation * Centrifugal cast gray liner features 40,000 psi tensile strength for superior wear and performance
Not Yet Reviewed
$1,175.36
S&S Cycle 98 in. big bore kits are a fantastic upgrade if your Harley® is just a bit tired. The thicker and beefier cylinders mean that the engine will run cooler and you'll love the forged pistons that come with the kits. These are the largest bores that can be fit in your stock engine case. The cylinder and piston kits make going to the max bore size easy. There is no machining required and stock engine height is maintained. These kits come with nearly everything needed to get the most out of the added cu. in. to your stock engine. You won't believe how much power these kits produce! Features and specifications: * Kit yields excellent results with stock cylinder heads * Easy installation—no need to bore or split existing cases, just swap the cylinders * Available in a choice of either black or silver powdercoat finish with polished fins * Increased fin area for better heat dissipation * Valve pocket recessed in S&S pistons are enlarged for oversize valves and higher lift cams
Not Yet Reviewed
$1,187.06
Sierra has a 58-year history as a leading global manufacturer of aftermarket engine and drive parts for the marine industry, including complete engine maintenance kits for routine maintenance at designated service intervals. These cost-efficient tune-up kits provide you with a comprehensive solution for maintaining your engine, ensuring optimal performance and reliability. Select the maintenance kit recommended for your vehicle type and engine.
Not Yet Reviewed
$54.99
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$73.99
The S&S Cycle 80 in. stock bore cylinder kits for a Harley-Davidson® offers the benefit of maintaining the original engine characteristics while providing a reliable and readily available replacement option. Unlike "big bore" kits which enlarge the cylinder diameter to increase engine displacement and horsepower, a stock bore kit simply replaces worn cylinders with new ones of the same size. These stock bore cylinder kits are ideal for situations where you need to rebuild the engine without significantly altering its power delivery or overall performance, while still achieving a quality repair. If your Harley® engine needs a rebuild due to wear and tear, the S&S Cycle 80 in. stock bore cylinder kits are a good choice to restore the engine to its original functionality. Select the S&S Cycle big bore kit specifically designed for your HD® model and year.
Not Yet Reviewed
$1,121.95
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$2,349.95
Restore that crisp, clean power that your bike used to have. Vertex high-compression piston kits are a work of art and offer you an affordable way to increase horsepower while maintaining stock engine displacement. To handle the internal pressures of a 4-stroke engine, these pistons are forged from the highest quality 2618 aluminum alloy for superior strength and durability, and moly coated piston skirts for faster break-in time and increased piston life. The kits also include rings, a pin, and clips. Improve power and torque across the entire rpm range with Vertex.
Not Yet Reviewed
$242.06
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$252.86
The S&S Cycle 74 inch stock bore cylinder kits are intended to replace worn cylinders and pistons of a 74 in. Shovelhead engine for a Harley-Davidson® motorcycle and keep stock compression ratio of 8:1. The primary purpose of these S&S Cycle stock bore cylinder kits is to maintain the original "74 cubic inch" displacement of older Harley-Davidson® engines, essentially allowing for a rebuild, while also keeping the engine size the same without increasing the bore size beyond the standard dimensions for a 74 cubic inch engine.
Not Yet Reviewed
$2,295.95
The S&S Cycle 132 in. big bore cylinder kits for a Harley-Davidson® motorcycle provides a significant increase in engine displacement, resulting in a substantial boost in horsepower and torque. This in turn makes the bike significantly faster with more power across the powerband, particularly noticeable in low and mid-range acceleration, while still maintaining compatibility with stock crankcases and retaining the stock engine height, offering a "sleeper" advantage with minimal visual modification. These big bore cylinder kits are typically designed to work with existing engine components like the stock head gaskets and flywheels. This makes installing them a significant investment compared to other performance upgrades. Each kit is tailored with the necessary components for your specific model. Many kits feature a powdercoat finish that closely matches the factory look. To fully optimize increased power, proper tuning with adjustments to fuel injection and ignition timing may be necessary. Order the 132 in. big bore cylinder kit designed specifically for your HD® model and engine to ensure proper fitment.
Not Yet Reviewed
$1,599.95
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$1,649.95
S&S Cycle's 132 in. power packages with gear drive cam are a high performance upgrade for an HD® motorcycle. They significantly increase the displacement of the engine to 132 cubic inches, while utilizing a gear-driven camshaft system. This provides benefits like increased horsepower and torque, improved reliability due to the robust gear drive, smoother power delivery, and a more aggressive engine character compared to a stock setup; all while maintaining compatibility with the existing engine case and allowing for a relatively easy installation process. Many power packages allow for selecting cams with different valve timing profiles to tailor the power characteristics to individual riding preferences. These kits are designed to work with existing engine components, often requiring minimal modifications to install, making them a popular choice for engine upgrades. Order the S&S Cycle kit designed specifically for your HD® model and engine to ensure proper fitment.
Not Yet Reviewed
$3,559.95
S&S Cycle offers 89 in. stock bore cylinder kits for various Harley-Davidson® motorcycles, allowing for easy upgrades on a variety of models. One of the key advantages of using one of these S&S Cycle cylinder kits is that they use the stock cylinder bore, and often requires minimal machining or crankcase splitting, making installation relatively straightforward compared to larger big bore kits. There are several benefits of using one of these to upgrade your bike's performance, including increased engine displacement without major modifications to the stock engine, maintaining the original look, cost-effectiveness compared to full big bore kits, and often requiring minimal machining or crankcase splitting for installation. Even with a relatively small displacement increase to 89 cubic inches, the engine will experience a noticeable power boost compared to the stock configuration. To optimize performance, consider upgrading other engine components like pistons, cams, and exhaust systems alongside this S&S Cycle stock bore cylinder kit. Select the kit specifically designed for your Harley® model and year.
Not Yet Reviewed
$1,244.95
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$1,399.95
S&S Cycle's 88 in. big bore kits provide significant benefits by increasing the engine displacement, resulting in more power and torque, especially noticeable in the low to mid-range powerband, while generally maintaining the stock engine character and rideability; essentially giving the bike a stronger punch with increased acceleration without drastically altering its feel. The larger bore size allows for more air and fuel to be ingested per combustion cycle, leading to a noticeable boost in power output, particularly in the low and mid-range rpm bands. For riders who frequently haul loads, the increased torque can be beneficial for pulling heavier trailers or carrying extra cargo. Many 88 in. big bore kits are designed to work with mostly stock components, requiring minimal additional engine modifications for installation. Compared to other performance upgrades like high-lift cams or forced induction, a big bore kit is often considered a cost-effective way to significantly increase engine power. After installing a big bore kit, proper engine tuning with adjustments to the fuel injection or carburetor settings is crucial to optimize performance and ensure efficient combustion. Select the S&S Cycle big bore kit specifically designed for your HD® model and year.
Not Yet Reviewed
$1,359.95
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$1,999.95
The S&S Cycle 98 in. big bore cylinder kits for a Harley-Davidson® motorcycle can provide significant benefits, especially for riders seeking more acceleration and pulling power. The larger cylinder bore can dramatically increase engine displacement, resulting in a noticeable boost in horsepower and torque, particularly in the low and mid-range power bands, making for a more powerful and responsive ride, while often still maintaining compatibility with stock cylinder heads and requiring minimal modifications for installation. Many big bore kits are designed as "bolt-on" options; meaning they can be installed without extensive modifications to the existing engine, making them a popular choice for Harley® enthusiasts. To maximize the benefits of a big bore kit, it is often recommended to upgrade other engine components like the camshaft and intake system to optimize airflow and further enhance performance. After the big bore kit install, proper tuning with adjustments to fuel injection settings, as well as the ignition timing may be necessary.
Not Yet Reviewed
$2,499.95
S&S Cycle 117 in. big bore kits are a popular choice for riders looking to upgrade their engine power without major modifications. Available for a variety of Harley-Davidson® motorcycles, each kit is tailored with the necessary components for your specific HD® model. Many kits come with a powdercoat finish that can match the stock engine look to maintain a clean aesthetic. Using one of S&S Cycle's big bore kits can provide significant benefits like a noticeable increase in horsepower and torque due to the larger engine displacement, relatively easy installation with minimal machine work required, a quality build with durable components, and a good balance of performance and reliability. For best performance, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required. Although not mandatory, S&S Cycle recommends adding an oil cooler to bikes ridden in warmer climates. Select the S&S Cycle big bore kit designed for your application needs.
Not Yet Reviewed
$1,595.95
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$1,599.95
Sierra Marine outboard engine maintenance kits can provide you with a comprehensive solution for maintaining the widely used Mercury Outboard engine models, ensuring optimal performance and reliability. These cost-efficient kits contain the essential components for routine maintenance at designated service intervals. Each kit is presented in a high-quality, full-color Sierra branded box with a vibrant label. The labels showcase product images, detailed information, and contents of the box. Additional details: * Essential parts for your Mercury engine at a fraction of the cost compared to buying them individually * High-quality spark plugs are pre-gapped and ready for installation * Water pump kits, thermostats, and fuel filters specifically engineered for each engine model * Aluminum anodes to prevent corrosion
Not Yet Reviewed
$282.99
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$507.99
The S&S Cycle 129 in. big bore cylinder kits for a Harley-Davidson® motorcycle provides a significant increase in engine displacement, leading to substantially more power and torque, especially in the low and mid-range, while still maintaining compatibility with the stock crankcases for a noticeable performance boost. These kits essentially, give your bike a "bigger punch" without requiring extensive structural changes. Big bore kits often provide a noticeable improvement in low-end torque, making the bike more responsive in everyday riding situations. Most 129 in. kits are designed to work with stock crankcases and other engine components, simplifying installation. Many kits maintain the factory engine appearance with powdercoat finishes, giving the bike a subtle look that belies its enhanced performance. To fully optimize the performance gains from a big bore kit, additional tuning adjustments like adjusting the fuel injection system or changing the camshaft may be necessary. Each 129 in. big bore cylinder kit is tailored with the necessary components for your specific bike model. Select the kit that's designed specifically for your model and engine to ensure proper fitment.
Not Yet Reviewed
$1,595.95
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$1,599.95
S&S Cycle 95 in. Super Stock Hot Set-Up Kits are true bolt-on kits. There is no machining required, they maintain stock engine height, and enable up to a 40 hp increase. Components and specs: * .045 in. MLS head gaskets * S&S 585 gear drive cams * S&S high-strength chromoly tubing pushrods * Enlarged valve pocket recesses in S&S pistons accommodate oversize valves and high-lift cams * S&S 3 7/8 in. bore cylinders and pistons * 79cc cylinder heads * Machined wrinkle black powdercoat finish
Not Yet Reviewed
$3,627.86
S&S Cycle's 1200cc cylinder kits are a popular choice for riders looking to upgrade their engine power. These kits can provide significant benefits by increasing the engine displacement, resulting in more power and torque, allowing for better acceleration, quicker highway passing, and a more robust overall riding experience compared to a smaller engine capacity, particularly noticeable on heavier bikes or when carrying passengers and cargo, while still maintaining the street bike's character and feel. Each kit is tailored with the necessary components for your specific HD® or Buell motorcycle model. Many 1200cc kits can be further customized with performance upgrades like high-flow air filters and performance exhausts to further enhance power output. For proper installation to ensure optimal performance and to avoid potential engine issues, it is recommended to have it done by a qualified mechanic.
Not Yet Reviewed
$1,099.95
S&S Cycle's 111 in. Hot Set Up kits are tailored with the necessary components for your specific Harley-Davidson® model. Using this kit on the stock crankcases provides the benefit of significantly increasing your engine displacement and horsepower without requiring a complete engine rebuild. This allows you to maintain your original engine serial numbers while experiencing noticeable performance gains with a relatively simple installation process, all while utilizing your existing crankcases which can be cost-effective compared to a full engine replacement. After installation, proper tuning on a dyno is recommended to optimize engine performance.
Not Yet Reviewed
$1,534.95
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