Harley Cylinders and Parts
Harley Bike Cylinders & Parts at JJ Motorsports
Boost displacement and performance with premium cylinders and parts from JJ Motorsports, featuring big-bore kits, stud sets, and precision-machined cylinders for Sportster, Big Twin, Evo, and M8 engines. These high-quality components deliver reliable compression and perfect fit.
Shop Colony and Revolution Performance for proven durability. Explore related categories such as Harley engine for pistons and gaskets, or Harley for cams and heads to complete your big-bore build.
Top Harley Cylinders & Parts
- Colony Cylinder Stud Set 9424-8 – Chrome-plated cylinder stud kit; high-strength for Big Twin and Evo heads with perfect thread engagement.
- Revolution Performance LLC Cylinder Kit RP201-101W – 101ci big-bore cylinder kit; complete with pistons for Twin Cam performance upgrades.
- Revolution Performance LLC Cylinder Kit RP201-608W – 608ci cylinder kit for Sportster; massive displacement with matching pistons for serious power.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
S&S CYCLE Cylinder and Piston Kit 910-0203
S&S CYCLE
MSRP: $1,282.95Now: $1,154.66Was: $1,282.95Push your engine beyond factory limits with the S&S Cycle 910-0203 Cylinder and Piston Kit. This purpose-built upgrade transforms stock displacement into serious horsepower, delivering the bore and compression needed for measurable performance gains. If...09310430- SKU:
- 09310430
- Availability:
- Ships Same Business Day
- Weight:
- 26.35 LBS
- COLOR/FINISH:
- POWDER-COATED
- BORE SIZE IMPERIAL:
- 3.875'
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 106'
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
- COLOR/FINISH:
- WRINKLE BLACK
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,282.95Now: $1,154.66Was: $1,282.95 -
On Sale
S&S CYCLE Cylinder Kit 910-0200
S&S CYCLE
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95The S&S CYCLE 910-0200 Big Bore kit delivers measurable displacement gains without the expense and downtime of case splitting. Swap in premium cylinders and pistons to unlock genuine performance increases while maintaining compatibility with your stock...09310433- SKU:
- 09310433
- Availability:
- Ships Same Business Day
- Weight:
- 26.63 LBS
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- STYLE:
- BIG BORE
- BORE SIZE IMPERIAL:
- 3.875'
- COLOR/FINISH:
- SILVER
- DISPLACEMENT:
- 95'
- MATERIAL:
- ALUMINUM
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95Qty in Cart: 0Quantity:Price:MSRP: $1,287.95Now: $1,159.16Was: $1,287.95Subtotal: -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0500
S&S CYCLE
MSRP: $1,345.95Now: $1,211.36Was: $1,345.95If you're running a Twin Cam engine at stock displacement, you're leaving serious power on the table. The S&S Cycle Big Bore cylinder kit delivers a straightforward path to increased displacement and horsepower without the complexity of case splitting or...09310534- SKU:
- 09310534
- Availability:
- Ships Same Business Day
- Weight:
- 25.71 LBS
- DISPLACEMENT:
- 107'
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- COMPRESSION RATIO IMPERIAL:
- 9.9:1
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
MSRP: $1,345.95Now: $1,211.36Was: $1,345.95 -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0482
S&S CYCLE
MSRP: $1,358.95Now: $1,223.06Was: $1,358.95If you're looking to unlock genuine horsepower gains on your Twin Cam engine without major case work, the S&S Cycle Big Bore Cylinder Kit delivers straightforward displacement increase with minimal fabrication. Swap out your stock cylinders for premium...09310537- SKU:
- 09310537
- Availability:
- Ships Same Business Day
- Weight:
- 25.60 LBS
- DISPLACEMENT:
- 98'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 9.8:1
- COLOR/FINISH:
- SILVER
- MATERIAL:
- ALUMINUM
MSRP: $1,358.95Now: $1,223.06Was: $1,358.95 -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0338
S&S CYCLE
MSRP: $1,643.95Now: $1,479.56Was: $1,643.95If you're running stock cylinder heads and looking to unlock genuine displacement gains without case splitting, the S&S Cycle Big Bore kit delivers measurable power increases with straightforward bolt-on installation. This is serious engine building for...09310541- SKU:
- 09310541
- Availability:
- Ships Same Business Day
- Weight:
- 24.59 LBS
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 11.4:1
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 124'
MSRP: $1,643.95Now: $1,479.56Was: $1,643.95 -
On Sale
S&S CYCLE Cylinder Kit 910-0689
S&S CYCLE
MSRP: $1,008.95Now: $908.06Was: $1,008.95If you're serious about extracting maximum displacement and compression from your Harley-Davidson engine, the S&S Cycle 1250cc Cylinder Kit is the foundation every builder reaches for. These forged pistons and precision-machined cylinders deliver the...09310527- SKU:
- 09310527
- Availability:
- Ships Same Business Day
- Weight:
- 22.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- MATERIAL:
- IRON
- MATERIAL:
- ALUMINUM
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- TYPE:
- FLAT TOP
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.562'
- DISPLACEMENT:
- 1250 CC
- MATERIAL:
- CAST
- RIDING STYLE:
- STREET
MSRP: $1,008.95Now: $908.06Was: $1,008.95Qty in Cart: 0Quantity:Price:MSRP: $1,008.95Now: $908.06Was: $1,008.95Subtotal: -
On Sale
S&S CYCLE Cylinder Kit 910-0692
S&S CYCLE
MSRP: $1,008.95Now: $908.06Was: $1,008.95Looking to unlock serious displacement gains on your Harley-Davidson? The S&S Cycle 1250cc Cylinder Kit delivers a straightforward path to increased horsepower and torque without compromise. This complete kit includes everything needed for a...09310528- SKU:
- 09310528
- Availability:
- Ships Same Business Day
- Weight:
- 22.96 LBS
- TYPE:
- DOMED
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- BORE SIZE IMPERIAL:
- 3.562'
- DISPLACEMENT:
- 1250 CC
- MATERIAL:
- CAST
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 11.2:1
- MATERIAL:
- IRON
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,008.95Now: $908.06Was: $1,008.95 -
On Sale
S&S CYCLE Top End Kit - Big Twin 90-0098
S&S CYCLE
MSRP: $3,659.95Now: $3,293.96Was: $3,659.95If you're running a Big Twin and want bolt-on power without the machine shop downtime, the S&S Cycle Top End Kit delivers a complete, ready-to-install solution. Pre-fit pistons and precision-engineered cylinder heads mean you can go from stripped engine...09031270- SKU:
- 09031270
- Availability:
- Ships Same Business Day
- Weight:
- 60.10 LBS
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- BORE SIZE IMPERIAL:
- 3.500'
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
- DISPLACEMENT:
- 80'
- RIDING STYLE:
- STREET
- STYLE:
- SHOVELHEAD
MSRP: $3,659.95Now: $3,293.96Was: $3,659.95 -
On Sale
S&S CYCLE Cylinders - 4.25" - M8 - Black Highlighted Fins 910-0682
S&S CYCLE
MSRP: $970.95Now: $873.86Was: $970.95A larger displacement is the most direct path to increased horsepower and torque on your M8 engine. These S&S Cycle cylinders deliver the cubic inches you need without sacrificing reliability or requiring extensive machine work. Bolt them straight onto...09310838- SKU:
- 09310838
- Availability:
- Ships Same Business Day
- Weight:
- 26.61 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COLOR/FINISH:
- WRINKLE BLACK
- PRODUCT NAME:
- CYLINDER
- STYLE:
- BIG BORE
- UNITS:
- PAIR
MSRP: $970.95Now: $873.86Was: $970.95Qty in Cart: 0Quantity:Price:MSRP: $970.95Now: $873.86Was: $970.95Subtotal: -
On Sale
S&S CYCLE Cylinders with Pistons - Black 910-0324
S&S CYCLE
MSRP: $1,643.95Now: $1,479.56Was: $1,643.95If you're building a high-displacement Harley big twin with serious compression and real-world reliability, this S&S Cycle cylinder and piston kit delivers the precision engineering you need to make power without compromise. These forged pistons and...09310686- SKU:
- 09310686
- Availability:
- Ships Same Business Day
- Weight:
- 24.90 LBS
- PRODUCT NAME:
- BIG BORE CYLINDER KIT
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- COLOR/FINISH:
- WRINKLE BLACK
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- POWDER-COATED
- STROKE LENGTH IMPERIAL:
- 4.625'
- DISPLACEMENT:
- 124'
MSRP: $1,643.95Now: $1,479.56Was: $1,643.95 -
On Sale
S&S CYCLE Cylinders and Pistons - 84" Stroker 91-9017
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95Building a stroker engine demands precision-matched components that work together seamlessly—and that's exactly what this S&S CYCLE cylinder and piston kit delivers. Whether you're constructing an 84", 86", or 88" stroker from the ground up or refreshing...09310689- SKU:
- 09310689
- Availability:
- Ships Same Business Day
- Weight:
- 35.44 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.4:1
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- STOCK BORE CYLINDER
- BORE SIZE IMPERIAL:
- 3.4375'
- DISPLACEMENT:
- 88'
- UNITS:
- KIT
- DISPLACEMENT:
- 84'
- DISPLACEMENT:
- 86'
- MATERIAL:
- CAST IRON
- COLOR/FINISH:
- GLOSS BLACK
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Big Bore Cylinder and Stroker Piston Kit 91-9001
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95Building or rebuilding a big-bore Harley engine demands precision components that can handle sustained high RPM and boost. This S&S Cycle kit delivers the bore and stroke combination you need to unlock serious displacement gains—whether you're starting...09310690- SKU:
- 09310690
- Availability:
- Ships Same Business Day
- Weight:
- 32.30 LBS
- DISPLACEMENT:
- 88'
- MATERIAL:
- IRON
- STROKE LENGTH IMPERIAL:
- 4.250'
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- COLOR/FINISH:
- GLOSS BLACK
- COMPRESSION RATIO IMPERIAL:
- 7.5:1
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- CAST
- RIDING STYLE:
- STREET
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Cylinder Kit - 100" - Silver 910-0642
S&S CYCLE
MSRP: $1,540.95Now: $1,386.86Was: $1,540.95Looking to unlock serious displacement and power without pulling your engine? The S&S Cycle 100" Cylinder Kit transforms your 88" big twin into a potent, streetable powerhouse—all with the engine still mounted in the frame. This bolt-in solution delivers...09310739- SKU:
- 09310739
- Availability:
- Ships Same Business Day
- Weight:
- 26.01 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- DISPLACEMENT:
- 100'
- COLOR/FINISH:
- SILVER
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- RIDING STYLE:
- STREET
- MODEL:
- SIDEWINDER
- STROKE LENGTH IMPERIAL:
- 4'
- TYPE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,540.95Now: $1,386.86Was: $1,540.95 -
On Sale
S&S CYCLE Cylinder Kit - 110" - Silver 910-0650
S&S CYCLE
MSRP: $1,540.95Now: $1,386.86Was: $1,540.95If you're running an 88", 96", or 103" big twin and want genuine displacement gains without tearing down your entire engine, the S&S 110" Cylinder Kit delivers real power where it counts. This bolt-on solution installs with your engine in the frame—no...09310741- SKU:
- 09310741
- Availability:
- Ships Same Business Day
- Weight:
- 25.51 LBS
- MODEL:
- SIDEWINDER
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- SILVER
- DISPLACEMENT:
- 110'
- TYPE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.000'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- STREET
MSRP: $1,540.95Now: $1,386.86Was: $1,540.95 -
On Sale
S&S CYCLE Cylinder - Standard - 131" - Black - M8 910-0763
S&S CYCLE
MSRP: $1,559.95Now: $1,403.96Was: $1,559.95If you're serious about extracting maximum displacement from your M8, this S&S Cycle 131" cylinder is the foundation of a legitimate power increase. The engineered geometry delivers substantial horsepower and torque gains while maintaining compatibility...09311011- SKU:
- 09311011
- Availability:
- Ships Same Business Day
- Weight:
- 28.91 LBS
- COLOR/FINISH:
- NON-HIGHLIGHTED FINS
- TYPE:
- STROKER
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 131'
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- UNITS:
- KIT
- COLOR/FINISH:
- POWDER-COATED
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- BORE SIZE IMPERIAL:
- 4.250'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- STYLE:
- BIG BORE
MSRP: $1,559.95Now: $1,403.96Was: $1,559.95 -
On Sale
S&S CYCLE Cylinder - Evolution 91-7710
S&S CYCLE
MSRP: $840.95Now: $756.86Was: $840.95If your Evolution engine is showing signs of wear—loss of compression, scoring, or declining performance—a factory-quality cylinder replacement is the most direct path to restored power and reliability. S&S Cycle's Evolution cylinders maintain OEM...09310260- SKU:
- 09310260
- Availability:
- Ships Same Business Day
- Weight:
- 24.75 LBS
- TYPE:
- ENGINE
- BORE SIZE IMPERIAL:
- 3.500'
- DISPLACEMENT:
- 80'
- MATERIAL:
- ALUMINUM
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- STYLE:
- EVOLUTION
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COLOR/FINISH:
- WRINKLE BLACK
- PRODUCT NAME:
- CYLINDER
MSRP: $840.95Now: $756.86Was: $840.95 -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0205
S&S CYCLE
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95If you're running stock cylinders on your Twin Cam and want to unlock genuine displacement gains without the machine shop headaches, this S&S big bore kit delivers a straightforward path to more cubic inches and measurable power. The ability to swap...09310436- SKU:
- 09310436
- Availability:
- Ships Same Business Day
- Weight:
- 26.00 LBS
- BORE SIZE IMPERIAL:
- 3.927'
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 97'
- MATERIAL:
- ALUMINUM
- STYLE:
- BIG BORE
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95Qty in Cart: 0Quantity:Price:MSRP: $1,287.95Now: $1,159.16Was: $1,287.95Subtotal: -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0201
S&S CYCLE
MSRP: $1,219.95Now: $1,097.96Was: $1,219.95If you're running stock cylinders on your Twin Cam and hitting performance limits, the S&S CYCLE Big Bore kit delivers measurable displacement gains without the machine work or case splitting that traditional boring requires. Swap in premium aluminum...09310437- SKU:
- 09310437
- Availability:
- Ships Same Business Day
- Weight:
- 26.07 LBS
- BORE SIZE IMPERIAL:
- 3.927'
- COLOR/FINISH:
- SILVER
- DISPLACEMENT:
- 97'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4'
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,219.95Now: $1,097.96Was: $1,219.95Qty in Cart: 0Quantity:Price:MSRP: $1,219.95Now: $1,097.96Was: $1,219.95Subtotal: -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0480
S&S CYCLE
MSRP: $1,345.95Now: $1,211.36Was: $1,345.95If you're running a Twin Cam engine and want measurable power gains without extensive machine work, the S&S CYCLE Big Bore kit delivers cubic inches and performance through a straightforward cylinder swap. Premium aluminum castings with cast-in iron...09310535- SKU:
- 09310535
- Availability:
- Ships Same Business Day
- Weight:
- 25.32 LBS
- COLOR/FINISH:
- SILVER
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.9:1
- DISPLACEMENT:
- 107'
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- BORE SIZE IMPERIAL:
- 3.937'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
MSRP: $1,345.95Now: $1,211.36Was: $1,345.95 -
On Sale
S&S CYCLE Cylinder Kit 910-0204
S&S CYCLE
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95If you're running stock cylinders on your S&S–equipped engine, you're leaving serious displacement and power on the table. The S&S CYCLE Big Bore Cylinder Kit 910-0204 delivers measurable gains in horsepower and torque without requiring case splitting or...09310432- SKU:
- 09310432
- Availability:
- Ships Same Business Day
- Weight:
- 26.30 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 95'
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Engine Cylinders and Parts
- Compatibility: Ensure cylinders and parts match your Harley's engine type (e.g., Big Twin 1930-1984, Twin Cam, Sportster) and specifics like bore size (3.500" to 4.500") or stroke (4" to 4-5/8"). Use the vehicle selector for year-specific fits to avoid performance or rebuild issues.
- Type of Use: For standard rebuilds, opt for stud sets for secure cylinder mounting; big-bore upgrades (85ci to 143ci) suit performance engines for increased horsepower and displacement in street or touring conditions.
- Components and Upgrades: Select stud sets (4/8-pack) or big-bore kits with pistons; upgrade to no-sleeving cylinders with electroplated bores for friction reduction. Focus on compression ratios (9.0:1-11.3:1) and finishes (natural, silver, black, highlighted fins) for optimal performance.
- Brand and Quality: Choose Colony for heat-treated stud sets in chrome/black, Revolution Performance LLC for aerospace-grade aluminum cylinder kits with nickel-silicon-carbide bores, or Eastern Motorcycle Parts for base studs. Prioritize USA-made quality for durability and lower engine temperatures.
- Installation and Cost: Parts are bolt-on for easy DIY rebuilds; kits include pistons for complete upgrades. Prices range from $10.95 for stud packs to $1,899.95 for premium cylinder kits—factor in same-day shipping and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these cylinders and parts support? Parts support Big Twin (1930-1984), Twin Cam (e.g., 98ci to 101ci), Sportster (e.g., 1200cc to 128ci)—use the year/make/model filter for exact compatibility with bore/stroke specifics.
- How do big-bore cylinder kits improve performance? They increase displacement (e.g., 85ci to 143ci) and horsepower with no-sleeving electroplated bores for less friction, lower temps, and longer lifespan.
- What is typically included in a cylinder kit? Kits include cylinders, pistons (e.g., flat-top), with options for finishes like black with highlighted fins—check details for compression ratios (9.0:1-11.3:1).
- Are stud sets durable? Yes, heat-treated steel with chrome/black finishes provides high strength and perfect thread engagement for secure cylinder mounting.
- What if a part doesn't fit my Harley? Verify bore size, stroke, and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore pistons/rings, gaskets, or cams in the Harley engine category to complement your cylinders upgrade for a full rebuild.
