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 Accelerator Pump O-Ring 27360-76
JAMES GASKET
$11.40A worn or degraded accelerator pump o-ring compromises fuel delivery precision and can cause stumbling, hesitation, or flat spots during acceleration. This OEM-quality replacement restores proper...DS193626- SKU:
- DS193626
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- 20 PACK
- TYPE:
- SEAL
- APPLICATION:
- ACCELERATOR PUMP
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
$11.40 -
JAMES GASKET Low Speed Adjustment O-Ring - Big Twin 27892-78
JAMES GASKET
$6.70Precise carburetor tuning hinges on reliable low-speed adjustment components, and this JAMES GASKET O-ring is engineered to maintain a consistent seal under repeated adjustment cycles. A worn or...DS193628- SKU:
- DS193628
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- APPLICATION:
- CARBURETOR
- PRODUCT NAME:
- O-RING
$6.70 -
JAMES GASKET Shifter Lever Seal - XL 7019
JAMES GASKET
$11.40Shifter lever seals prevent fluid leakage and contamination at one of your transmission's most vulnerable points. A quality seal like this JAMES GASKET unit eliminates sloppy, unreliable shifts...DS193632- SKU:
- DS193632
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- APPLICATION:
- SHIFTER SHAFT
- APPLICATION:
- CHAIN COVER
- RIDING STYLE:
- STREET
$11.40 -
JAMES GASKET Pushrod Seal Set - Big Twin 17955-48-FL
JAMES GASKET
$17.95When you're rebuilding your Big Twin engine or replacing the camshaft, using the correct pushrod seals is non-negotiable—improper seals lead to oil leaks and compromised engine performance. The JAMES...DS194493- SKU:
- DS194493
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- PUSHROD TUBE
- MATERIAL:
- CORK
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- STREET
$17.95 -
JAMES GASKET Inner Primary Bearing Seal 12018
JAMES GASKET
$19.40A worn or failing inner primary bearing seal compromises the integrity of your primary drive system, leading to fluid leakage, contamination, and accelerated wear on critical components. The JAMES...DS194480- SKU:
- DS194480
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- INNER PRIMARY
$19.40 -
JAMES GASKET Clutch Hub Nut Seal 12014
JAMES GASKET
$9.10A worn or damaged clutch hub nut seal compromises your transmission's integrity, leading to fluid leakage and accelerated wear on internal components. This JAMES GASKET direct OEM replacement...DS194475- SKU:
- DS194475
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- SPROCKET
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$9.10 -
JAMES GASKET Mainshaft Seal 5 Speed - Big Twin 12050
JAMES GASKET
$9.95A worn mainshaft seal is a gateway to catastrophic engine failure—oil seepage leads to inadequate lubrication, bearing wear, and costly internal damage. The JAMES GASKET Mainshaft Seal 5 Speed is...DS194476- SKU:
- DS194476
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- EACH
- APPLICATION:
- MAIN DRIVE GEAR
- APPLICATION:
- MAINSHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- TRANSMISSION
$9.95 -
JAMES GASKET Trans Mainshaft Seal - Small 12022
JAMES GASKET
$9.40A worn mainshaft seal is a direct path to transmission fluid leakage, which compromises lubrication and accelerates internal wear. The JAMES GASKET Trans Mainshaft Seal delivers OEM-grade sealing...DS194470- SKU:
- DS194470
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 5 PACK
$9.40 -
JAMES GASKET Motor Sprocket Seal 35151-52-A
JAMES GASKET
$17.40A leaking motor sprocket seal compromises engine efficiency and invites contamination into critical drivetrain components. The JAMES GASKET Motor Sprocket Seal 35151-52-A delivers OEM-grade sealing...DS194415- SKU:
- DS194415
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- 5 PACK
- APPLICATION:
- ENGINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- TRANSMISSION
$17.40 -
JAMES GASKET Sprocket Shaft Seal - XL 12049-DL
JAMES GASKET
$14.70A worn or failing sprocket shaft seal is an open invitation for oil leakage, bearing contamination, and premature drivetrain failure. The JAMES GASKET Sprocket Shaft Seal XL 12049-DL provides a...DS194417- SKU:
- DS194417
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- SPROCKET SHAFT
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- APPLICATION:
- TRANSMISSION
$14.70 -
JAMES GASKET Right Side Mainshaft Seal - XL 12030
JAMES GASKET
$12.40A failing mainshaft seal is a silent killer for transmission longevity—once it starts leaking, metal-on-metal contact accelerates wear exponentially. The JAMES GASKET Right Side Mainshaft Seal (XL...DS194418- SKU:
- DS194418
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$12.40 -
JAMES GASKET Points Seal - XL 11124
JAMES GASKET
$19.70A failing points seal compromises your engine's reliability and can lead to costly internal damage. The JAMES GASKET Points Seal XL 11124 delivers a precision fit that prevents oil seepage and...DS194420- SKU:
- DS194420
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- 5 PACK
- APPLICATION:
- CAM COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
$19.70 -
JAMES GASKET Points Double Lip Seal - XL 11124-DL
JAMES GASKET
$19.70Seal degradation leads to fluid leakage, contamination, and premature bearing failure—all preventable with a quality seal upgrade. The JAMES GASKET Points Double Lip Seal delivers superior sealing...DS194421- SKU:
- DS194421
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- CAM COVER
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$19.70 -
JAMES GASKET Lower Pushrod Quad Seal 11133-A
JAMES GASKET
$13.20Pushrod seals are critical to maintaining oil pressure and preventing leakage in high-performance engines where every drop of lubrication matters. The JAMES GASKET Lower Pushrod Quad Seal delivers...DS194422- SKU:
- DS194422
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- PUSHROD COVER
- PRODUCT NAME:
- X-RING
- RIDING STYLE:
- STREET
- TYPE:
- QUAD SEAL
- UNITS:
- 25 PACK
- APPLICATION:
- TAPPET GUIDE
- MATERIAL:
- RUBBER
$13.20 -
JAMES GASKET Small Main Drive Gear Seal 12013
JAMES GASKET
$11.50A leaking main drive gear seal compromises both performance and engine longevity, allowing critical lubricant to escape and contaminants to enter your drivetrain. The JAMES GASKET Small Main Drive...DS194423- SKU:
- DS194423
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- MAIN DRIVE GEAR
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$11.50 -
JAMES GASKET Shifter Shaft Seal - XL 34035-52
JAMES GASKET
$14.80Transmission fluid leaks compromise performance and can lead to catastrophic drivetrain failure. The JAMES GASKET Shifter Shaft Seal XL provides a reliable, OEM-quality seal that prevents fluid loss...DS194440- SKU:
- DS194440
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- APPLICATION:
- SHIFTER SHAFT
- PRODUCT NAME:
- SEAL
$14.80 -
JAMES GASKET Mainshaft Double Lip Seal - XL 37741-67
JAMES GASKET
$31.40A compromised main drive gear shaft seal can lead to catastrophic fluid loss and internal drivetrain damage. The JAMES GASKET Mainshaft Double Lip Seal XL 37741-67 delivers reliable sealing...DS194450- SKU:
- DS194450
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$31.40 -
JAMES GASKET Pushrod Seal Kit - Big Twin 11133-V2
JAMES GASKET
$11.95A pushrod seal failure can compromise your entire engine rebuild, allowing oil to seep past critical sealing points and undermining all the precision work you've invested in. The JAMES GASKET Pushrod...DS194458- SKU:
- DS194458
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- PUSHROD TUBE
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$11.95 -
JAMES GASKET Point Double Lip Seal 83162-51DL
JAMES GASKET
$18.30Engine sealing integrity directly impacts performance and longevity—a compromised seal allows fluid leakage and contaminant ingress that degrades critical components. The JAMES GASKET Point Double...DS194460- SKU:
- DS194460
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- CAMSHAFT
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
$18.30 -
JAMES GASKET Motor Sprocket Seal - XL 35151-74
JAMES GASKET
$23.10A failing motor sprocket seal is an open invitation for oil leakage, bearing contamination, and premature drivetrain wear. The JAMES GASKET Motor Sprocket Seal XL 35151-74 delivers OEM-grade sealing...DS194461- SKU:
- DS194461
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- SPROCKET
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$23.10
