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
-
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-606W
REVOLUTION PERFORMANCE, LLC
$1,529.95REVOLUTION PERFORMANCE, LLC Cylinder Kit09311039- SKU:
- 09311039
- Availability:
- Ships Same Business Day
- Weight:
- 24.26 LBS
- DISPLACEMENT:
- 128'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.250'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- RIDING STYLE:
- STREET
$1,529.95Qty in Cart: 0Quantity:Price:$1,529.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-607W
REVOLUTION PERFORMANCE, LLC
$1,529.95A precision cylinder kit is essential for engine rebuilds and high-performance applications where stock components won't cut it. The RP201-607W delivers the bore accuracy and material quality required for reliable power delivery, whether you're restoring...09311040- SKU:
- 09311040
- Availability:
- Ships Same Business Day
- Weight:
- 25.40 LBS
- DISPLACEMENT:
- 128'
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK GRANITE
- BORE SIZE IMPERIAL:
- 4.250'
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- RIDING STYLE:
- STREET
$1,529.95Qty in Cart: 0Quantity:Price:$1,529.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-126W
REVOLUTION PERFORMANCE, LLC
$1,529.95A precision cylinder kit built for builders who demand exact bore specifications and reliable performance from their engine build. The Revolution Performance RP201-126W delivers the dimensional accuracy and material quality required for high-rpm...09311046- SKU:
- 09311046
- Availability:
- Ships Same Business Day
- Weight:
- 21.51 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$1,529.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-130W
REVOLUTION PERFORMANCE, LLC
$1,529.95` and `/` tags only 3. **Concise technical specifications** (2-4 words per bullet) 4. **Industry-standard terminology** with zero marketing fluff 5. **SEO-friendly copy** that reads naturally Please share the complete technical spec sheet, and I'll have...09311047- SKU:
- 09311047
- Availability:
- Ships Same Business Day
- Weight:
- 21.61 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- GRANITE
- UNITS:
- KIT
$1,529.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit - 85" - Black with Highlighted Fins RP201-204W
REVOLUTION PERFORMANCE, LLC
$1,479.95If you're serious about extracting maximum displacement and horsepower from your engine without machine work, the Revolution Performance 85" Cylinder Kit is engineered for immediate bolt-on installation. The aerospace-grade aluminum construction with...09311056- SKU:
- 09311056
- Availability:
- Ships Same Business Day
- Weight:
- 20.91 LBS
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3-9/16'
- DISPLACEMENT:
- 85'
- FEATURES:
- DOMED
- PRODUCT NAME:
- BIG BORE CYLINDER KIT
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- RIDING STYLE:
- STREET
$1,479.95 -
On Sale
S&S CYCLE Cylinder Kit - M8 910-0681
S&S CYCLE
MSRP: $1,561.95Now: $1,405.76Was: $1,561.95The S&S Cycle M8 910-0681 Big Bore kit delivers straightforward displacement increases without the complexity of case splitting or cylinder boring. If you're running stock M8 heads and want measurable power gains with minimal machine work, this is your...09310833- SKU:
- 09310833
- Availability:
- Ships Same Business Day
- Weight:
- 13.50 LBS
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 124'
- MATERIAL:
- IRON
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE SIZE IMPERIAL:
- 4.250'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,561.95Now: $1,405.76Was: $1,561.95Qty in Cart: 0Quantity:Price:MSRP: $1,561.95Now: $1,405.76Was: $1,561.95Subtotal: -
On Sale
S&S CYCLE Cylinder Kit 910-0691
S&S CYCLE
MSRP: $1,008.95Now: $908.06Was: $1,008.95If you're serious about maximizing displacement and compression on your Harley-Davidson, the S&S Cycle 1250cc Cylinder Kit (910-0691) delivers the cubic inches and flow characteristics you need without compromising reliability. This forged-piston upgrade...09310526- SKU:
- 09310526
- Availability:
- Ships Same Business Day
- Weight:
- 22.71 LBS
- BORE SIZE IMPERIAL:
- 3.562'
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- DISPLACEMENT:
- 1250 CC
- UNITS:
- KIT
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- STYLE:
- BIG BORE
- TYPE:
- FLAT TOP
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MATERIAL:
- IRON
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 - M8 910-0733
S&S CYCLE
MSRP: $1,559.95Now: $1,403.96Was: $1,559.95If you're running an M8 and want measurable horsepower gains without splitting your cases, the S&S CYCLE Big Bore kit delivers straightforward performance. This bolt-on cylinder swap pairs seamlessly with your stock heads, making it an efficient path to...09310876- SKU:
- 09310876
- Availability:
- Ships Same Business Day
- Weight:
- 28.80 LBS
- COLOR/FINISH:
- BLACK GRANITE
- MATERIAL:
- IRON
- DISPLACEMENT:
- 128'
- BORE SIZE IMPERIAL:
- 4.250'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- STYLE:
- BIG BORE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
MSRP: $1,559.95Now: $1,403.96Was: $1,559.95Qty in Cart: 0Quantity:Price:MSRP: $1,559.95Now: $1,403.96Was: $1,559.95Subtotal:
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.
