Harley Engine
Harley Bike Engine Parts at JJ Motorsports
Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.
Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.
Top Harley Engine Products
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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DRAG SPECIALTIES Piston - Evolution 750739-BX-LB1
DRAG SPECIALTIES
$117.61OEM-quality pistons are the foundation of reliable engine performance, and this Drag Specialties kit delivers proven durability without premium pricing. The cast aluminum alloy construction with...DS750739- SKU:
- DS750739
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON DIAMETER IMPERIAL:
- 3.498'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- UNITS:
- KIT
$117.61Qty in Cart: 0Quantity:Price:$117.61Subtotal: -
DRAG SPECIALTIES Piston - Evolution 750740-BX-LB1
DRAG SPECIALTIES
$117.61If you're rebuilding an engine or replacing worn pistons, you need a reliable OEM-quality replacement that won't compromise performance or durability. The DRAG Specialties Evolution pistons deliver...DS750740- SKU:
- DS750740
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +0,005'
- BORE SIZE IMPERIAL:
- 3.503'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- PISTON DIAMETER IMPERIAL:
- 3.503'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$117.61 -
DRAG SPECIALTIES Piston - Evolution 750741-BX-LB1
DRAG SPECIALTIES
$117.61OEM-quality piston replacement that delivers reliable performance without the premium price tag. Whether you're rebuilding after high-mileage wear or refreshing your engine for consistent power...DS750741- SKU:
- DS750741
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- BORE SIZE IMPERIAL:
- 3.508'
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- BORE - OVERSIZE:
- +0,010'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON DIAMETER IMPERIAL:
- 3.508'
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- UNITS:
- KIT
$117.61 -
DRAG SPECIALTIES Piston - Evolution 750742-BX-LB1
DRAG SPECIALTIES
$117.61If you're running your Evolution engine into the ground with worn or damaged pistons, you're losing compression, efficiency, and reliability. The DRAG SPECIALTIES Evolution 750742-BX-LB1 delivers...DS750742- SKU:
- DS750742
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- BORE SIZE IMPERIAL:
- 3.518'
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON DIAMETER IMPERIAL:
- 3.518'
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,020'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
$117.61 -
DRAG SPECIALTIES Piston - Evolution 750743-BX-LB1
DRAG SPECIALTIES
$117.61Whether you're rebuilding a tired engine or replacing worn stock pistons, the DRAG Specialties Evolution 750743-BX-LB1 delivers OEM-quality performance without the premium price tag. The cast...DS750743- SKU:
- DS750743
- Availability:
- Ships Same Business Day
- Weight:
- 2.69 LBS
- BORE SIZE IMPERIAL:
- 3.528'
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +0,030'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- PISTON DIAMETER IMPERIAL:
- 3.528'
- UNITS:
- KIT
$117.61 -
DRAG SPECIALTIES Connecting Rod Assembly - XL 2427586A-BX-LB1
DRAG SPECIALTIES
$425.01Stock connecting rods are often the first point of failure under increased load or sustained high-RPM operation. The DRAG SPECIALTIES XL 2427586A-BX-LB1 Connecting Rod Assembly delivers heavy-duty...DS194664- SKU:
- DS194664
- Availability:
- Ships Same Business Day
- Weight:
- 3.88 LBS
- UNITS:
- SET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CONNECTING ROD ASSEMBLY
- STYLE:
- HEAVY DUTY
- RIDING STYLE:
- STREET
$425.01 -
DRAG SPECIALTIES Rocker Arm - Front Exhaust/Rear Intake 17375-83-HC3
DRAG SPECIALTIES
$83.69Rocker arm failure compromises valve timing and can lead to catastrophic engine damage—this OEM-style replacement restores factory precision and reliability. Whether you're rebuilding after a race or...DS193834- SKU:
- DS193834
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MOUNTING POSITION:
- REAR INTAKE
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- FRONT EXHAUST
- PRODUCT NAME:
- ROCKER ARM
- UNITS:
- EACH
$83.69 -
DRAG SPECIALTIES Lifter Block - Black - Shovelhead 20489BK-BX-LB1
DRAG SPECIALTIES
$172.95A properly functioning lifter block is critical for maintaining correct valve clearance and engine reliability on your Shovelhead—misalignment or wear here directly impacts horsepower and longevity...DS194024- SKU:
- DS194024
- Availability:
- Ships Same Business Day
- Weight:
- 3.75 LBS
- BASE COLOR:
- BLACK
- PRODUCT NAME:
- LIFTER BLOCK
- COLOR/FINISH:
- BLACK
- MATERIAL:
- CAST IRON
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$172.95 -
DRAG SPECIALTIES Connecting Rod Assembly - 2 Piece Set 84589
DRAG SPECIALTIES
$632.77A connecting rod failure at full throttle isn't just expensive—it's catastrophic. The DRAG Specialties 84589 Connecting Rod Assembly replaces worn or damaged rods with OEM-spec components that...09230467- SKU:
- 09230467
- Availability:
- Ships Same Business Day
- Weight:
- 5.66 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CONNECTING ROD ASSEMBLY
- RIDING STYLE:
- STREET
- STYLE:
- HEAVY DUTY
- UNITS:
- SET
$632.77 -
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...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...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 -
DRAG SPECIALTIES Rebuild Kit - Drag TC88 88723
DRAG SPECIALTIES
$27.51A properly functioning oil pump is critical to engine longevity and performance—inadequate oil circulation leads to bearing wear, increased friction, and catastrophic engine failure. This DRAG...09320221- SKU:
- 09320221
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- OIL PUMP
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$27.51 -
DRAG SPECIALTIES Rebuild Kit - Drag TC96 88724
DRAG SPECIALTIES
$27.51A properly functioning oil pump is non-negotiable for engine longevity and performance. This Drag Specialties rebuild kit supplies OEM-equivalent internal components to restore your DS Oil Pump to...09320222- SKU:
- 09320222
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- OIL PUMP
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$27.51 -
DRAG SPECIALTIES Cam Cover - Chrome - Big Twin 35-0015
DRAG SPECIALTIES
$304.17A worn or damaged cam cover compromises engine sealing and allows oil contamination—direct threats to engine longevity and performance. This chrome-finished die-cast aluminum cover restores OEM-level...09400785- SKU:
- 09400785
- Availability:
- Ships Same Business Day
- Weight:
- 2.97 LBS
- TYPE:
- CAM
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$304.17 -
DRAG SPECIALTIES Hydraulic Lifter Unit - Big Twin 17920-53A-HC3
DRAG SPECIALTIES
$57.95Hydraulic lifters are critical to maintaining precise valve timing and reducing wear on your Big Twin's valvetrain. A worn or failing lifter can cause erratic idle, valve float, and catastrophic...DS194051- SKU:
- DS194051
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- LIFTER
- UNITS:
- EACH
- STYLE:
- HYDRAULIC
$57.95 -
DRAG SPECIALTIES Inner Rocker Box Gasket 302133-HC4
DRAG SPECIALTIES
$14.05A leaking rocker box gasket compromises oil containment and can lead to messy engine bays and potential oil starvation issues. This OEM-quality replacement gasket from Drag Specialties ensures a...DS376510- SKU:
- DS376510
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$14.05Qty in Cart: 0Quantity:Price:$14.05Subtotal: -
On Sale
EDDIE TROTTA DESIGNS Points Cover - Platinum - Black - M8 TC-566B
EDDIE TROTTA DESIGNS
MSRP: $138.00Now: $88.00Was: $138.00A quality points cover protects your ignition system from moisture and debris while delivering the visual impact your M8 deserves. Eddie Trotta's precision CNC-machined design combines functional...09401728- SKU:
- 09401728
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- PLATINUM CUT
- TYPE:
- POINT
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- BASE COLOR:
- BLACK
MSRP: $138.00Now: $88.00Was: $138.00Qty in Cart: 0Quantity:Price:MSRP: $138.00Now: $88.00Was: $138.00Subtotal: -
GARDNER-WESTCOTT Male Elbow - 3/16" x 1/8" - Chrome 7-49IE-3X2
GARDNER-WESTCOTT
$13.95Reliable hydraulic and fuel line connections demand precision fittings that won't leak under pressure. This Gardner-Westcott male elbow delivers the secure, repeatable fit professional racers and...DS245256- SKU:
- DS245256
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- FITTING
- TYPE:
- MASTER CYLINDER
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- MATERIAL:
- BRASS
- CONNECTION TYPE:
- 1/8' NPT (MALE)
- CONNECTOR ANGLE:
- 90°
$13.95Qty in Cart: 0Quantity:Price:$13.95Subtotal: -
GARDNER-WESTCOTT Male - 90' - 3/8"-1/8" NPT - Chrome 7-91TD-6X2
GARDNER-WESTCOTT
$29.95Proper NPT fittings are essential for leak-free hydraulic and pneumatic connections in high-performance applications. This Gardner-Westcott 90-degree adapter ensures reliable fluid transfer under...DS245258- SKU:
- DS245258
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- HOSE
- UNITS:
- EACH
- CONNECTOR ANGLE:
- 90°
- PRODUCT NAME:
- FITTING
- CONNECTION TYPE:
- 1/8' NPT (MALE)
- COLOR/FINISH:
- CHROME
- CONNECTION TYPE:
- 3/8' HOSE FITTING
- RIDING STYLE:
- STREET
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
GARDNER-WESTCOTT Male Elbow - 5/16" x 1/8" - Chrome 7-91HB-5X2
GARDNER-WESTCOTT
$14.95Proper hose routing and fluid management are critical in any high-performance engine bay, and substandard fittings will compromise system integrity under pressure. The GARDNER-WESTCOTT Male Elbow...DS245259- SKU:
- DS245259
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- CONNECTION TYPE:
- 5/16' HOSE FITTING
- TYPE:
- HOSE
- CONNECTOR ANGLE:
- 90°
- PRODUCT NAME:
- FITTING
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- CONNECTION TYPE:
- 1/8' NPT (MALE)
$14.95Qty in Cart: 0Quantity:Price:$14.95Subtotal:
