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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JAMES GASKET 5th Gear O-Ring - XL 11113
JAMES GASKET
$8.50A worn or damaged 5th gear O-ring compromises shift quality and can lead to costly internal transmission damage. The JAMES GASKET 5th Gear O-Ring restores proper seal integrity, eliminating gear...09350362- SKU:
- 09350362
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- 10 PACK
$8.50 -
On Sale
JOKER MACHINE Points Cover - Anodized Black 02-98TC
JOKER MACHINE
MSRP: $72.95Now: $65.66Was: $72.95The JOKER MACHINE Points Cover protects your ignition system from dirt, moisture, and debris while delivering a clean, finished appearance to your engine bay. This anodized black cover resists...09400997- SKU:
- 09400997
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- SILVER
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- POINT
- COLOR/FINISH:
- BLACK
MSRP: $72.95Now: $65.66Was: $72.95 -
DRAG SPECIALTIES Piston - Twin Cam 21989-07
DRAG SPECIALTIES
$151.53If your Twin Cam engine is showing signs of wear or you're rebuilding from the ground up, OEM-quality pistons are non-negotiable. The DRAG SPECIALTIES Piston kit delivers cast aluminum construction...09110021- SKU:
- 09110021
- Availability:
- Ships Same Business Day
- Weight:
- 2.11 LBS
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON DIAMETER IMPERIAL:
- 3.875'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- PRODUCT NAME:
- PISTON
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$151.53 -
DRAG SPECIALTIES Piston - Twin Cam 21989-07+.010
DRAG SPECIALTIES
$151.53Your Twin Cam engine demands pistons engineered for reliability and consistent performance—especially if you're running stock or modified boost levels. This DRAG SPECIALTIES piston kit delivers...09110023- SKU:
- 09110023
- Availability:
- Ships Same Business Day
- Weight:
- 2.41 LBS
- BORE - OVERSIZE:
- +0,010'
- PISTON DIAMETER IMPERIAL:
- 3.875'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- PRODUCT NAME:
- PISTON
$151.53 -
DRAG SPECIALTIES Piston 750700-BX-LB1
DRAG SPECIALTIES
$119.73A piston kit that delivers OEM-grade reliability without the OEM price tag. Whether you're rebuilding a tired engine or replacing worn internals, this DRAG SPECIALTIES piston set gives you the...DS750700- SKU:
- DS750700
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- PISTON DIAMETER IMPERIAL:
- 3.437'
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE IMPERIAL:
- 3.437'
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- PRODUCT NAME:
- PISTON
- STROKE LENGTH IMPERIAL:
- 3-31/32'
$119.73Qty in Cart: 0Quantity:Price:$119.73Subtotal: -
DRAG SPECIALTIES Piston 750711LC-BX-LB1
DRAG SPECIALTIES
$119.73If you're running a small-displacement engine that demands reliable, efficient power delivery, OEM-quality pistons are non-negotiable. This DRAG SPECIALTIES kit delivers cast aluminum construction...DS750711- SKU:
- DS750711
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- PRODUCT NAME:
- PISTON
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- COMPRESSION RATIO IMPERIAL:
- 7.5:1
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- PAIR
- BORE - OVERSIZE:
- +0,010'
- PISTON DIAMETER IMPERIAL:
- 3.447'
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- BORE SIZE IMPERIAL:
- 3.437'
- RIDING STYLE:
- STREET
$119.73 -
DRAG SPECIALTIES Piston 750733LC-BX-LB1
DRAG SPECIALTIES
$123.97If you're rebuilding or refreshing your engine, piston quality directly impacts reliability, efficiency, and longevity. The DRAG Specialties 750733LC-BX-LB1 delivers OEM-level performance without the...DS750733- SKU:
- DS750733
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +0,030'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 7.2:1
- PISTON DIAMETER IMPERIAL:
- 3.528'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
$123.97 -
DRAG SPECIALTIES Rocker Arm - Rear Exhaust/Front Intake - Shovelhead 17360-66-BX
DRAG SPECIALTIES
$55.07Rocker arm wear directly impacts valve timing precision and overall engine reliability—especially critical in high-performance Shovelhead applications where tight tolerances demand exact component...DS193800- SKU:
- DS193800
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- APPLICATION:
- EXHAUST
- MOUNTING POSITION:
- FRONT INTAKE
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- REAR EXHAUST
- PRODUCT NAME:
- ROCKER ARM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$55.07Qty in Cart: 0Quantity:Price:$55.07Subtotal: -
DRAG SPECIALTIES Rocker Arm - Front Exhaust/Rear Intake - Shovelhead 17375-66-BX
DRAG SPECIALTIES
$55.07Rocker arm wear compromises valve timing and can quickly escalate into catastrophic engine damage—especially in high-performance Shovelhead applications where precision is non-negotiable. These DRAG...DS193801- SKU:
- DS193801
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- FRONT EXHAUST
- PRODUCT NAME:
- ROCKER ARM
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR INTAKE
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
$55.07Qty in Cart: 0Quantity:Price:$55.07Subtotal: -
DRAG SPECIALTIES Rocker Arm - Rear Exhaust/Front Intake 17360-83-HC3
DRAG SPECIALTIES
$83.69Rocker arm geometry directly impacts valve lift, duration, and overall engine response—making OEM-spec replacements critical for maintaining factory performance characteristics. Whether you're...DS193833- SKU:
- DS193833
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- FRONT INTAKE
- MOUNTING POSITION:
- REAR EXHAUST
- PRODUCT NAME:
- ROCKER ARM
- UNITS:
- EACH
$83.69 -
DRAG SPECIALTIES Gerotor Scavenge - TC88/96 88721
DRAG SPECIALTIES
$88.99A failing oil pump directly compromises engine reliability and performance—especially in high-demand applications where oil delivery can't afford inconsistency. The DRAG SPECIALTIES Gerotor Scavenge...09320219- SKU:
- 09320219
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- PRODUCT NAME:
- GEROTOR SCAVENGE
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$88.99 -
DRAG SPECIALTIES Gerotor Feed - TC88/96 88722
DRAG SPECIALTIES
$28.57A properly functioning oil pump is non-negotiable for engine longevity and reliability. The DRAG SPECIALTIES Gerotor Feed assembly delivers consistent oil pressure and volume to critical engine...09320220- SKU:
- 09320220
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GEROTOR FEED
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$28.57Qty in Cart: 0Quantity:Price:$28.57Subtotal: -
DRAG SPECIALTIES Right Roller Bearing Retainer - Big Twin 148107-BC105
DRAG SPECIALTIES
$24.67A worn or damaged crankcase roller bearing retainer compromises crankshaft stability and can lead to catastrophic engine failure—especially critical in high-rpm applications where bearing support is...DS194015- SKU:
- DS194015
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- ROLLER
- PRODUCT NAME:
- BEARING
- APPLICATION:
- CRANKCASE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$24.67Qty in Cart: 0Quantity:Price:$24.67Subtotal: -
GARDNER-WESTCOTT 1/8" NPT Inverted Flare - Female - Zinc 7-W250-3X2
GARDNER-WESTCOTT
$13.95Reliable hydraulic and pneumatic connections demand fittings you can trust under pressure. This Gardner-Westcott inverted flare fitting delivers leak-free performance with precision engineering and...DS245278- SKU:
- DS245278
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- CONNECTOR ANGLE:
- STRAIGHT
- PRODUCT NAME:
- FITTING
- COLOR/FINISH:
- CHROME
- CONNECTION TYPE:
- 3/8' HOSE FITTING
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- CONNECTION TYPE:
- 1/8' NPT (MALE)
- TYPE:
- OIL TANK
$13.95Qty in Cart: 0Quantity:Price:$13.95Subtotal: -
On Sale
ANDREWS EV31 Cam - Evolution 291117
ANDREWS
MSRP: $251.95Now: $226.76Was: $251.95If you're running a supercharged or big-inch Evolution engine with serious compression ratios, the Andrews EV31 cam is engineered to unlock the full potential of forced induction. This...09250071- SKU:
- 09250071
- Availability:
- Ships Same Business Day
- Weight:
- 2.04 LBS
- APPLICATION:
- INTAKE
- EXHAUST CLOSE IMPERIAL:
- 8°
- EXHAUST OPEN IMPERIAL:
- 52°
- INTAKE OPEN IMPERIAL:
- 10°
- PRODUCT NAME:
- CAM
- TYPE:
- CHAIN
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- INTAKE DURATION IMPERIAL:
- 236°
- INTAKE LIFT IMPERIAL:
- 0.495'
- EXHAUST DURATION IMPERIAL:
- 240°
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.122'
- GRIND:
- EV31
- INTAKE CLOSE IMPERIAL:
- 46°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.133'
- INTAKE LOBE CENTERLINE IMPERIAL:
- 108°
- EXHAUST LIFT IMPERIAL:
- 0.495'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 112°
- RIDING STYLE:
- STREET
MSRP: $251.95Now: $226.76Was: $251.95Qty in Cart: 0Quantity:Price:MSRP: $251.95Now: $226.76Was: $251.95Subtotal: -
On Sale
ANDREWS Cam Set - Dyna - Twin Cam 216321
ANDREWS
MSRP: $415.95Now: $374.36Was: $415.95The ANDREWS Cam Set 216321 is a bolt-in upgrade designed to deliver measurable torque gains across the 1700–5200 RPM band, making it ideal for riders who want responsive power without compromising...09250112- SKU:
- 09250112
- Availability:
- Ships Same Business Day
- Weight:
- 3.21 LBS
- APPLICATION:
- INTAKE
- EXHAUST CLOSE IMPERIAL:
- 8°
- EXHAUST DURATION IMPERIAL:
- 264°
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 106°
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- APPLICATION:
- EXHAUST
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.121'
- EXHAUST LIFT IMPERIAL:
- 0.498'
- INTAKE CLOSE IMPERIAL:
- 30°
- INTAKE DURATION IMPERIAL:
- 255°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.134'
- INTAKE LIFT IMPERIAL:
- 0.498'
- INTAKE OPEN IMPERIAL:
- 10°
- TYPE:
- CHAIN
- EXHAUST OPEN IMPERIAL:
- 41°
- GRIND:
- 21 SERIES
- INTAKE LOBE CENTERLINE IMPERIAL:
- 100°
- PRODUCT NAME:
- CAM KIT
MSRP: $415.95Now: $374.36Was: $415.95 -
On Sale
ANDREWS Cam Set - Dyna - Twin Cam 216367G
ANDREWS
MSRP: $476.95Now: $429.26Was: $476.95The ANDREWS Cam Set 216367G delivers measurable torque gains across the 1700-5200 rpm range—ideal for riders seeking responsive low-to-mid power without sacrificing streetability. Built as a...09250179- SKU:
- 09250179
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- EXHAUST CLOSE IMPERIAL:
- 22°
- EXHAUST DURATION IMPERIAL:
- 260°
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.187'
- EXHAUST OPEN IMPERIAL:
- 58°
- GRIND:
- 67 SERIES
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- EXHAUST LIFT IMPERIAL:
- 0.570'
- INTAKE DURATION IMPERIAL:
- 252°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.209'
- INTAKE CLOSE IMPERIAL:
- 48°
- INTAKE OPEN IMPERIAL:
- 24°
- UNITS:
- PAIR
- APPLICATION:
- INTAKE
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 108°
- INTAKE LIFT IMPERIAL:
- 0.570'
- INTAKE LOBE CENTERLINE IMPERIAL:
- 102°
- TYPE:
- GEAR
MSRP: $476.95Now: $429.26Was: $476.95Qty in Cart: 0Quantity:Price:MSRP: $476.95Now: $429.26Was: $476.95Subtotal: -
On Sale
ANDREWS Cam Set - Dyna - Twin Cam 216354G
ANDREWS
MSRP: $476.95Now: $429.26Was: $476.95The ANDREWS Cam Set 216354G is engineered for Dyna and Twin Cam platforms where you need measurable torque gains without sacrificing streetability. This bolt-in cam delivers responsive power across...09250280- SKU:
- 09250280
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- EXHAUST LIFT IMPERIAL:
- 0.555'
- INTAKE CLOSE IMPERIAL:
- 42°
- PRODUCT NAME:
- CAM KIT
- INTAKE DURATION IMPERIAL:
- 238°
- INTAKE LIFT IMPERIAL:
- 0.555'
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- APPLICATION:
- EXHAUST
- EXHAUST CLOSE IMPERIAL:
- 15°
- EXHAUST DURATION IMPERIAL:
- 238°
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.158'
- EXHAUST OPEN IMPERIAL:
- 43°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 103°
- INTAKE OPEN IMPERIAL:
- 16°
- APPLICATION:
- INTAKE
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 104°
- GRIND:
- 54 SERIES
- INTAKE LIFT AT TDC IMPERIAL:
- 0.165'
- TYPE:
- GEAR
MSRP: $476.95Now: $429.26Was: $476.95Qty in Cart: 0Quantity:Price:MSRP: $476.95Now: $429.26Was: $476.95Subtotal: -
DRAG SPECIALTIES Battery Box/Oil Tank Vibration Mount - 1/4" 19268A
DRAG SPECIALTIES
$23.27Vibration isolation is critical for maintaining component integrity and extending service life on high-performance builds. This DRAG Specialties mount effectively decouples your battery box or oil...DS350145PK- SKU:
- DS350145PK
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BASE COLOR:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- VIBRATION MOUNT
- COLOR/FINISH:
- BLACK
$23.27Qty in Cart: 0Quantity:Price:$23.27Subtotal: -
DRAG SPECIALTIES Replacement Oil Tank - Chrome 70426
DRAG SPECIALTIES
$288.35A compromised oil tank compromises everything downstream—your engine's lubrication, cooling efficiency, and overall reliability. The DRAG SPECIALTIES Replacement Oil Tank restores proper oil...DS310108- SKU:
- DS310108
- Availability:
- Ships Same Business Day
- Weight:
- 5.15 LBS
- PRODUCT NAME:
- OIL TANK
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
- CAPACITY METRIC:
- 2.8 LITER
- UNITS:
- EACH
- CAPACITY IMPERIAL:
- 3 US QUART
- COLOR/FINISH:
- CHROME
$288.35Qty in Cart: 0Quantity:Price:$288.35Subtotal:
