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We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. Heads produce It was a labor-intensive—and expensive—process.
The cylinder slips into the existing case bore without modification. If so, you can retain that perfor- mance investment and combine those components with this kit. This kit will add a whopping 7 cubic inches of displacement for more torque throughout the RPM range. The kit includes front and rear cylinders, system-matched pistons with rings, and cylinder head gaskets.
Requires custom tuning to your specific application. The kit includes front and rear cylinders, system-matched pistons with rings, and top head gaskets. Cylinders are factory-honed to accept standard bore size 4. Cylinder spigot is machined for cylinder-to-cylinder clear- ance for this large displacement application.
Installation requires crankcase machining by a qualified machinist. Dealer installation is recommended. Kit includes front and rear cylinders and required gaskets.
Cylinders are factory honed to accept 4. Kit includes front and rear cylinders. These cylinders are sized to specific crankcases bored to CVO specifications. Use with flat-top, high-compression or Stroker pistons. The liquid-cooled exhaust valves reduce the chance of detonation and allow the engine to take advan- tage of higher compression ratios. Forged from high-strength aluminum, these These pistons include Titanium SST rings to withstand the stresses seen in racing. Forged from high- strength aluminum, these Theses pistons include state-of-the-art Titanium SST rings to withstand the stresses seen in racing.
The piston top dome is designed to match specifically with the combustion chamber to provide additional performance over other piston designs. Pistons are electroless-nickel coated for increased durability and the piston skirts feature a unique black coat- ing for improved wear-resistance, better fit and reduced noise.
The resulting compression ratio of Piston skirts feature a unique black coat- ing for improved wear-resistance, better fit and reduced noise. Developed for the " Race Kit, these pistons increase the compression ratio to Forged from high-strength alumi- num, the pistons are precision-machined, and feature coated skirts for a tight-tolerance fit and quieter operation.
Kit includes pistons, rings, pins and clips. The combination results in a compression ratio of Piston skirts feature a unique black coating for improved wear-resistance, better fit and reduced noise.
Kit includes rings, clips and pins. These pistons are forged for higher RPM capa- bility than cast pistons and come complete with rings, wrist pins and clips.
These pistons cannot be used in Stroker appli- cations. Piston kit includes rings, clips and pins. The flywheels and rods are made from high- strength forgings. The assembly makes use of the Original Equipment straight press crankpin and bearings, which mean you get proven durability.
Shortblock cases, flywheels, bear- ings and rods are pre-assembled and ready for your custom build. Kit includes current spec Original Equipment cam plate, oil pump, cam drive components and the gaskets, seals and most of the hardware required to complete the engine and install it not all components shown.
You select your cylinders, heads, cams, covers and other top-end components. The MSO is for Domestic only. Kits ship directly from the factory within days. Two required. The engine is easier to turn over, resulting in less wear on your starter and battery. After start, the ACR valves close to restore full compression. ACR gives you peace of mind and protects your investment. Releases are activated by pushing on the top before starting, which reduces cranking pressure, and allows the engine to spin over easier.
After the engine starts they automatically close to restore full compres- sion. Installation of these compression releases may require machining of the cylinder head. Increased capacity means the oil cycles through the engine less frequently and the oil can remain in the pan for a longer period of time.
The cast-in inter- nal baffles manage the flow to the oil pickup and keep the hot oil exposed to the heat-conducting ribbed aluminum sump. Kit includes cast aluminum oil pan and pan gasket. The Lefty Bearing is case hardened on the inner and outer race to provide increased load capacity and enhanced durability in high-torque applications.
The bearing is installed in the left side of the crank case and supports the output shaft to the primary drive system. Sleeve accepts press-in Timken bearing sold separately.
Installation requires separate purchase of model-specific Sprocket Spacer. Clutch is designed to improve engagement grip and provides minor slippage during downshifting to reduce shock to the power train. Reduces hand lever pull effort by over 1 pound. This bolt-on kit harnesses the centrifugal force of spinning weights to increase the clutch capacity as engine speed increases.
The mechanism applies increasing pressure to the stock clutch pressure plate as RPM rises. The result: High torque-handling capabilities without increasing clutch lever effort at idle. The Variable Pressure Clutch also provides smoother clutch disengagement at lower speed. Kit fits behind most stock derby covers with no modifications. See installation manual for additional accessory derby cover fitment information. To match the performance demands of your engine, team the Variable Pressure Clutch with your choice of clutch diaphragm springs.
Will support engines producing up to lb-ft of torque. Does not include clutch fric- tion plates. Designed to handle up to lb-ft of torque at the crank. Kit includes new precision- machined flat steel plates. Designed to outperform the Original Equipment compensator, this unit helps protect the engine and driveline components during harsh drag race launches. Compensator features improved oil passages, oil deflectors and a needle bearing thrust washer that improves the overall operation of these components.
Does not fit Trike. A direct replacement for the Original Equipment auto- matic version, this anodized billet aluminum adjuster allows you to fine-tune the settings and lock the position when the freeplay is properly set. The manual adjustment locks the chain tension in place to prevent the chain from adjust- ing during severe shifting. Kit includes required mounting hardware. Requires separate purchase of model-specific primary gaskets and seals. Requires separate purchase of model- specific primary gasket and seals.
Includes clutch cable. This eliminates sliding heavy gears to accomplish the shift and results in smooth, precise and light effort shifting. Sixth gear is a true overdrive, at a.
The overdrive feature allows you to run a lower engine RPM in sixth gear, at any given road speed. Lower RPM can result in lower vibration, longer engine life and smoother cruising. No speedometer or exhaust mount modifications are required. Complete transmissions are ready to install into the chassis and the 6-Speed Gear Set Kits are designed to replace the stock gear set without removing the transmission.
Gear Set Kits require slight modification template included to the Original Equipment transmission case and include all necessary installation hardware. Requires separate purchase of appropriate Side Cover Release Kit.
Sportster Stock vs. When ignited, the result is a major power increase. This race- inspired air cleaner is engineered to flow through the perim- eter and the face of the air filter, providing high volumes of unrestricted airflow to the engine. The open-design face plate features a rich black finish with machined longitudinal strakes to expose the glowing aluminum below. Kit includes air cleaner trim, one-piece cast back plate, high-flow washable air filter element, rain sock and all required hardware.
The complete kit features a composite air cleaner back plate, air cleaner cover adapter, a high-flow washable synthetic media filter element that does not require oiling and a breather system that routes gasses and excess oil directly into the intake.
Kit also includes cover trim and all mounting hardware. Available with brilliant chrome or gloss black back plate, this Round Air Cleaner transforms the appearance of your Evolution power plant and allows you to replace the Original Equipment oval air cleaner cover with your choice of acces- sory round covers.
Kit includes one-piece cast back plate, high-flow washable air filter element and all required hardware.
Designed for international markets that require ECE Certified mufflers. Mufflers include muffler shields and slash down end caps. Designed for International markets that require ECE certified mufflers.
Mufflers include matching slash down end caps. These Original Equipment-style Header Pipes have been finished with a unique jet black heat resistant coat- ing and are a great accent to both chrome and black Buckshot exhaust shields. When exposed through the holes in the Buckshot shields, the black header pipe provides a sinis- ter accent and hides the heat-tempered finish of the typical exhaust pipe.
Easy to install using factory mounting hardware, the kit includes front and rear header pipe. Manufactured to Original Equipment standards for exacting fit, the easy-to- install kit includes front and rear head pipe shields.
Available in chrome and jet black. Easy-to-install kit includes front and rear shields and mounting hardware. Complete kit includes top-end gaskets, and performance clutch spring. Designed to bring your XL model up to XL specifications. No case machining is required for installation. This complete engine package includes all the components you need to build a high-perfor- mance ride while still retaining the original factory warranty.
Installation does not require removal of the powertrain from the chassis. Requires separate purchase of 58mm compatible accessory air cleaner.
Also fits XL models with sepa- rate purchase of large bore cc cylinders. Requires sepa- rate purchase of accessory 58mm compatible air cleaner. This kit includes a system-matched high-flow intake manifold. Cylinders are sold separately. Two are required for the conver- sion. This High- Output Cam Kit is designed to work with compression ratios up to Rev limit: RPM. This cam is best suited for high horsepower and high RPM applications, and the.
Some engine machining may be required for proper fitment. See instruction sheets for details. The intake and exhaust ports are meticulously machined for smooth surfaces, improving the flow characteristics of air and fuel in order to provide enhanced performance. The combustion chambers have been machined for smooth surfaces and feature a blended radius on the bathtub edge to reduce detonation by eliminating hot spots and promoting improved combustion. The head gasket surface has been milled to maintain stock combustion cham- ber volume Heads are assembled with Original Equipment valves and high-performance valve springs that support cams with lift up to.
Requires installation of Perfect Fit Pushrod Kit -. Porting Service is designed for new heads removed from new bikes with less than 3, miles. This is not a refurbish or core- exchange program — the heads that are supplied will be reworked and returned. See your Dealer for complete program details. These forged pistons have been plated with electroless-nickel for maximum durability in high- performance applications.
Kit includes a pair of pistons, wrist pins, rings and circlips. Kit includes pistons, rings, pins and circlips. Requires sepa- rate purchase of cc cylinders and gaskets. Available in your choice of style and finish, this easy-to- install kit includes all mounting hardware and rain sock.
Air Cleaner features a washable high-flow, oiled cotton media element. ECE and State U. Self-adhesive backing for easy installation. The multi- ple stainless steel diffusion discs and domed end cap deliver an aggressive raspy sound. These easy-to-install caps are dressed with the same black-anodized finish as the Edge Cut Collection for a consistent look front to back and feature machined aluminum accents for a modern touch.
Larger filter element is washable, does not require oiling, and provides more capacity for bigger air flows and power. Breather manifold and all required hardware are included.
This design is also a great performer, constructed of stiff chrome moly tubing and thread-rolled adjusters for durability and strength. Broad torque band from RPM. Advanced profile design creates power from RPM. This is an awesome horsepower cam in a bolt-in disguise.
Unless specified, not for use on EFI models. This bearing provides increased load capacity and extends the engine life in extreme racing conditions. Kit includes single cam bearing. Please refer to instruction sheets and service manuals for more detail. The redesigned combustion chamber, optimized for flow and efficiency, works with stock or High-Compression Forged Piston Kits. Heads come with larger than stock 1. At 72cc, this equates to a 9.
Use of 12mm spark plugs required. Kits include pins, clips and rings. Not for use with stock Evolution Cylinder Heads. These are the value option for increased compression in the engine with stock heads. This kit features specially designed multi-layered steel head gaskets and includes all the additional Original Equipment gaskets required to do the job.
Evolution cast pistons should not be used when engine speed is expected to exceed RPM. Failure to comply may cause engine damage. Kit includes cam gaskets that permit this Stage Kit to be installed without removing the engine from the frame. See Figure 2. Place oil deflector cover side up on a clean protected surface. Apply adhesive: a. Apply adhesive to the perimeter of the part. Create an "X" pattern across the part. Apply adhesive to the sides that contact the primary cover.
View interactive image Figure 2. Apply Adhesive. See Figure 3. Carefully position deflector in primary cover and press firmly into place. Slide deflector into position. DO NOT lift. Install retention clip over oil deflector rib and the adjacent aluminum rib as shown. View interactive image Figure 3. Install Deflector and Retaining Clip. See Figure 4. Protect the outside surface of the primary cover to avoid damage. Secure the oil deflector in place using a C-clamp.
Allow approximately 30 minutes before handling. View interactive image Figure 4. Clamp Components Together. Install the new alternator rotor A to the engine compensating sprocket shaft per service manual instructions.
See Figure 7. Apply a thin layer of primary chaincase oil to the sliding cam 5 splines and the outer splines of shaft extension 4.
Install shaft extension with the flat side against alternator rotor. Installation requires separate purchase of model-specific Sprocket Spacer.
The Breath of the Beast. E asy to install , these pipes deliver impressive performance across a broad RPM range. This is power you can feel. Just define your performance goals, and pick the combination that gets you there.
Patent pending. Mufflers features high flowing internals to maximize performance, an aggressive exhaust note, and a unique black ceramic coating that stands up to abuse. NOTE: There is no warranty on exhaust pipes and mufflers with regard to any discoloration.
Blueing is caused by tuning characteristics, cam timing, carburetor jetting, over-heating, etc. Not legal for sale or use on California catalyst equipped vehicles. Harley-Davidson Slip-On Mufflers for Sportster Models These state street legal mufflers have a classic slash down or tapered baloney design that adds a custom touch to any XL.
The unique cutout nestles into the Original Equipment crossover. These big-body mufflers are available in a sporty degree baloney cut. Adjust as required for clearance. Street legal on stock displacement engines. The black-finished end caps feature cut-out chambers that expose the mirror chrome finish below for a bold contrast.
Choose your style, slash down or baloney cut. Unique baffle design improves power potential without adding loudness. Not legal for sale or use on California catalyst-equipped vehicles. Street Performance Mufflers feature unique, high flow internals, tuned to sound as cool as they look. Chrome-plated mufflers feature a new ballistic-shape inlet and are street legal.
Kit includes chrome-plated front and rear shields and mounting hardware. Note: Due to increased diameter of these mufflers some realignment of headpipes is usually required. New Street Performance Mufflers boast great sound quality, and the high-flow internals deliver respectable increases in usable performance. These deeply chromeplated mufflers are designed to accept a variety of traditional or contemporary end caps to match your customizing style sold separately. Mufflers are state street-legal when installed on fuel injected motorcycles.
Not legal on California catalyst-equipped models. Requires separate purchase of two End Caps. Softail Dual Exhaust Head Pipe Kit Enhance the nostalgic look of your motorcycle with this head pipe kit, which comes standard on stock Heritage Springer models. The kit includes all necessary pipes, shields and brackets to convert your stock exhaust to this dual exhaust look.
Mufflers sold separately. Installation on EFI models requires recalibration. A large selection of end cap designs are available sold separately to provide the finishing touch. The final result — great sound, great performance, and your own style.
Patent Pending. Street Performance one piece touring mufflers now available in black. Features an aggressive exhaust note, high flowing internals to maximize performance, and a unique black ceramic coating, unmatched for durability. Not legal for sale or use on California catalystequipped vehicles.
Touring Muffler Shield Kit These chrome-plated muffler shields extend the Original Equipment exhaust pipe shield to the end of the muffler and will not interfere with end caps. They are perfect for restoring the luster to your Performance Mufflers by covering any scratches or weathering.
Kit includes two exhaust shields and related hardware. The two-piece design allows removal of outer black shell for cleaning the inner chrome surface.
The mirror-chrome low-profile Air Cleaner Cover shields the element and opens breathing space between the backing plate and the cover. Cut-away bottom design exposes the air cleaner element to maximize the air flow. Forged Billet Aluminum Air Cleaner Cover This unique Billet Aluminum Air Cleaner Cover represents an industry design first — the inverted V-shape of the air inlet complements the engine, and the generous intake area maximizes engine breathing.
Manufactured from T6 billet aluminum, this high quality forged dual throat air cleaner cover is expertly CNC-machined to exacting tolerances.
Complete the installation with custom medallion inserts sold separately. Cover includes mounting bolt. See your dealer for specific applications. These easy-to-install Side Inserts are available in a matte black finish to add depth and dimension. The kit includes an O-ring gasket and individual decorative medallions. Easy to install. Easy-to-install, these braces offer increased torsional rigidity.
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