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 Top End Kit - Big Twin 90-0097
S&S CYCLE
MSRP: $3,659.95Now: $3,293.96Was: $3,659.95A top-end rebuild is one of the most cost-effective ways to restore lost compression and reclaim performance in a Big Twin engine. The S&S Cycle Top End Kit eliminates guesswork by bundling everything you need—pre-fitted pistons, quality cylinder heads,...09031269- SKU:
- 09031269
- Availability:
- Ships Same Business Day
- Weight:
- 61.50 LBS
MSRP: $3,659.95Now: $3,293.96Was: $3,659.95 -
On Sale
S&S CYCLE 129" Big Bore Cylinder Kit - Black - M8 910-0844
S&S CYCLE
MSRP: $1,499.95Now: $1,439.96Was: $1,499.95A 129" big bore displacement upgrade delivers the additional cubic inches your M8 engine needs to generate serious power gains without the hassle of a complete engine rebuild. S&S Cycle's bolt-on design means you'll gain performance immediately—no...09311080- SKU:
- 09311080
- Availability:
- Ships Same Business Day
- Weight:
- 28.51 LBS
MSRP: $1,499.95Now: $1,439.96Was: $1,499.95 -
On Sale
S&S CYCLE 132" Big-Bore Cylinder Kit - Black Granite/Highlighted Fins - M8 910-0847
S&S CYCLE
MSRP: $1,599.95Now: $1,484.96Was: $1,599.95The S&S Cycle 132" Big-Bore Cylinder Kit delivers substantial displacement gains without the complexity of a full engine rebuild. This bolt-on upgrade retains your stock engine height and original serial numbers, making it an ideal choice for riders...09311112- SKU:
- 09311112
- Availability:
- Ships Same Business Day
- Weight:
- 28.21 LBS
MSRP: $1,599.95Now: $1,484.96Was: $1,599.95 -
KIBBLEWHITE Cylinder Dowels - Big Twin - XL 83070-4
KIBBLEWHITE
$7.23Precise cylinder head location is non-negotiable when you're building or rebuilding a Big Twin engine—even the smallest misalignment can compromise gasket sealing and throttle response. KIBBLEWHITE Cylinder Dowels ensure repeatable, dead-accurate...DS199772- SKU:
- DS199772
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- COLOR/FINISH:
- GRAY
- PRODUCT NAME:
- DOWEL
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER
- UNITS:
- 4 PACK
$7.23 -
KIBBLEWHITE Cylinder Studs - Evolution/XL 20-2097
KIBBLEWHITE
$187.95High-performance cylinder studs are the foundation of a reliable engine assembly—especially under boost or high RPM loads where standard fasteners simply won't hold. The KIBBLEWHITE Evolution/XL studs eliminate weak points in material and thread design,...DS199770- SKU:
- DS199770
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
$187.95 -
KIBBLEWHITE Cylinder Stud - M8 - 8-Pack 20-21040
KIBBLEWHITE
$171.95Cylinder studs are critical fasteners that secure your cylinder head to the block—and substandard hardware can lead to blown gaskets, coolant leaks, and catastrophic engine failure. KIBBLEWHITE cylinder studs eliminate weak points through precision...24011105- SKU:
- 24011105
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
$171.95 -
KIBBLEWHITE Cylinder Dowels - Twin Cam 83080-4
KIBBLEWHITE
$13.01Proper cylinder head alignment is critical for sealing integrity, valve timing accuracy, and long-term engine reliability. KIBBLEWHITE cylinder dowels provide precision location points that eliminate guesswork during assembly, ensuring your head gasket...24010579- SKU:
- 24010579
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- CYLINDER
- UNITS:
- 4 PACK
- COLOR/FINISH:
- GRAY
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- DOWEL
$13.01 -
KIBBLEWHITE Cylinder Studs - Evolution 20-2098
KIBBLEWHITE
$187.95Cylinder stud failure can cost you a race, a season, or worse—your engine. KIBBLEWHITE's Evolution 20-2098 studs eliminate the weak points found in standard fasteners through precision manufacturing and controlled material stress, giving you the...DS199771- SKU:
- DS199771
- Availability:
- Ships Same Business Day
- Weight:
- 1.69 LBS
$187.95 -
KIBBLEWHITE Bolt Kit Rocker Stud - M8 20-21045
KIBBLEWHITE
$129.95Rocker studs endure constant cyclic stress and vibration, making thread integrity absolutely critical to engine reliability. KIBBLEWHITE's rolled-thread design on both the stud and nut ensures superior grip and fatigue resistance compared to cut-thread...24011107- SKU:
- 24011107
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
$129.95 -
KIBBLEWHITE Cylinder Studs - '99-'17 Twin Cam 20-20412
KIBBLEWHITE
$187.95Stock cylinder studs are a common failure point under sustained high RPM operation and forced induction, making quality replacements essential for any serious Twin Cam build. Kibblewhite's precision-engineered studs eliminate the weak points found in...24010578- SKU:
- 24010578
- Availability:
- Ships Same Business Day
- Weight:
- 1.52 LBS
$187.95 -
DRAG SPECIALTIES Cylinder - TC88 - 3.75" - Black - Highlighted Fins 88187
DRAG SPECIALTIES
$441.97A stock TC88 cylinder replacement needs to deliver both reliability and visual consistency with your engine's aesthetic. This Drag Specialties unit combines OEM-spec performance with a refined appearance, making it the straightforward choice for rebuilds...09310710- SKU:
- 09310710
- Availability:
- Ships Same Business Day
- Weight:
- 11.30 LBS
- COLOR/FINISH:
- HIGHLIGHTED FINS
- DISPLACEMENT:
- 96'
- BORE SIZE IMPERIAL:
- 3.435'
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- POWDER-COATED
- DISPLACEMENT:
- 88'
- MATERIAL:
- ALUMINUM
- MATERIAL:
- IRON
- UNITS:
- EACH
$441.97 -
DRAG SPECIALTIES Cylinder - TC103 - 3.875" 88461
DRAG SPECIALTIES
$272.37If you're running a stock or mildly modified engine, a quality OEM-spec cylinder is essential for maintaining compression integrity and reliable performance. The DRAG SPECIALTIES TC103 is engineered to exact OEM tolerances, ensuring proper bore diameter...09310822- SKU:
- 09310822
- Availability:
- Ships Same Business Day
- Weight:
- 10.06 LBS
- COLOR/FINISH:
- POWDER-COATED
- DISPLACEMENT:
- 103'
- MATERIAL:
- IRON
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- CAST
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- HIGHLIGHTED FINS
- PRODUCT NAME:
- CYLINDER
$272.37 -
COLONY Cylinder Stud Set 8858-8
COLONY
$37.95Cylinder studs are critical fastening points that withstand extreme combustion pressures and thermal cycling. Factory originals can stretch and fail under high-boost or nitrous applications, leading to catastrophic head gasket failure. The COLONY...DS189954- SKU:
- DS189954
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TYPE:
- CYLINDER
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
- UNITS:
- 8 PACK
$37.95 -
COLONY Cylinder Stud Set 9424-8
COLONY
$101.95Cylinder studs are critical fastening components that secure your cylinder head under extreme pressure and temperature cycling. Factory studs can stretch, fail, or lose clamp load over time—especially in high-boost or high-RPM applications. The COLONY...DS189953- SKU:
- DS189953
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
- UNITS:
- 8 PACK
- TYPE:
- CYLINDER
$101.95 -
COLONY Cylinder Stud Set 9507-8
COLONY
$88.95Cylinder studs are critical fasteners that withstand extreme pressure and thermal cycling in high-performance engines. Weak or stock studs can stretch, fail, or cause catastrophic engine damage during boost or high-RPM operation. The COLONY Cylinder Stud...DS189952- SKU:
- DS189952
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER
- UNITS:
- 8 PACK
- PRODUCT NAME:
- STUD SET
$88.95 -
EASTERN MOTORCYCLE PARTS Cylinder Base Studs - XL A-16830-54
EASTERN MOTORCYCLE PARTS
$10.95Cylinder base studs are critical fastening points that secure your cylinder head to the engine block under extreme pressure and heat cycles. Proper torque and secure fastening at these points prevent head gasket failure, combustion leaks, and...09310317- SKU:
- 09310317
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- STUD SET
- UNITS:
- 4 PACK
- TYPE:
- CYLINDER
- RIDING STYLE:
- STREET
$10.95 -
COLONY Cylinder Stud Set - 1930-1977 Big Twin 8856-8
COLONY
$39.95A reliable cylinder stud set is critical to maintaining head gasket integrity and preventing catastrophic engine failure on your Big Twin. Original studs can lose tension over time, leading to compression loss and potential coolant leakage. The COLONY...DS189956- SKU:
- DS189956
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- UNITS:
- 8 PACK
- TYPE:
- CYLINDER
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
$39.95 -
COLONY Cylinder Stud Set - 1978-1984 Big Twin 8857-8
COLONY
$39.95Cylinder studs endure extreme pressures and thermal cycling on every ignition cycle—factory originals can stretch, corrode, or fail under sustained performance conditions. This COLONY stud set restores proper clamp load and eliminates the risk of...DS189955- SKU:
- DS189955
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- TYPE:
- CYLINDER
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
- UNITS:
- 8 PACK
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-101W
REVOLUTION PERFORMANCE, LLC
$1,479.95Whether you're pushing peak RPM on the track or maximizing displacement in your build, a quality cylinder kit is fundamental to engine reliability and performance. The REVOLUTION PERFORMANCE, LLC RP201-101W delivers precision-engineered components...09311026- SKU:
- 09311026
- Availability:
- Ships Same Business Day
- Weight:
- 22.71 LBS
- STROKE LENGTH IMPERIAL:
- 4'
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- DISPLACEMENT:
- 98'
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.9375'
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- CYLINDER KIT
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-110W
REVOLUTION PERFORMANCE, LLC
$1,479.95A quality cylinder kit is the foundation of engine reliability and performance consistency. Whether you're rebuilding for durability or chasing peak horsepower, the REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-110W delivers precision-engineered...09311028- SKU:
- 09311028
- Availability:
- Ships Same Business Day
- Weight:
- 22.71 LBS
- COLOR/FINISH:
- NATURAL
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- BORE SIZE IMPERIAL:
- 3.9375'
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 98'
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4'
- UNITS:
- KIT
$1,479.95
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.
