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
-
JAMES GASKET Pushrod Washer - Big Twin 6737
JAMES GASKET
$10.50Pushrod washers are critical wear components that prevent valve train damage and maintain proper pushrod seating on your Big Twin engine. A worn or missing washer creates excessive play, leading to...09350131- SKU:
- 09350131
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- WASHER
- APPLICATION:
- PUSHROD TUBE
- RIDING STYLE:
- STREET
- UNITS:
- 20 PACK
$10.50 -
JAMES GASKET Drain Plug O-Ring 11105-100
JAMES GASKET
$27.10A failing drain plug o-ring is an easy way to develop an oil leak that'll cost you far more in engine damage than the part itself. JAMES GASKET's OEM-quality o-ring ensures a reliable seal every time...09351048- SKU:
- 09351048
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- UNITS:
- 100 PACK
- APPLICATION:
- DRAIN PLUG
$27.10 -
JAMES GASKET Coolant Manifold O-Ring JGI-11900090
JAMES GASKET
$8.50A leaking coolant manifold can compromise your engine's thermal management and lead to costly overheating issues mid-race or on the street. The JAMES GASKET Coolant Manifold O-Ring is engineered to...09350986- SKU:
- 09350986
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
$8.50 -
JAMES GASKET Trans O-Ring - M8 JGI-11900092
JAMES GASKET
$6.50Transmission sealing integrity is non-negotiable in high-performance applications—a single failed O-ring can compromise fluid pressure, create costly leaks, and sideline your build. The JAMES GASKET...09350987- SKU:
- 09350987
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- UNITS:
- 25 PACK
$6.50 -
JAMES GASKET Tappet Cover Gasket 17976-04-F
JAMES GASKET
$14.95A properly sealed tappet cover is essential for preventing oil seepage and maintaining engine cleanliness—worn or damaged gaskets lead to messy leaks and potential internal contamination. This JAMES...09351098- SKU:
- 09351098
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TAPPET COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$14.95 -
JAMES GASKET Clutch Hub Nut Seal Kit 12014-K
JAMES GASKET
$11.95A failing clutch hub nut seal compromises your entire drivetrain's integrity, allowing fluid seepage that degrades performance and reliability under racing conditions. This OEM-specification...09350081- SKU:
- 09350081
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CLUTCH HUB
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
$11.95 -
JAMES GASKET Manifold Seal Kit - XL/Panhead 27062-78-2
JAMES GASKET
$15.95A worn or compromised manifold seal kit will introduce vacuum leaks that throw off your air-fuel ratio, causing rough idle, hesitation, and lost power—issues that are notoriously difficult to...09350082- SKU:
- 09350082
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE MANIFOLD TO CARBURETOR
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
$15.95 -
JAMES GASKET Intake Seal Kit 27002-E1671
JAMES GASKET
$11.95Air leaks at intake seals rob your engine of power and create unpredictable tuning issues that are nearly impossible to diagnose without proper gaskets. The JAMES GASKET Intake Seal Kit 27002-E1671...09350085- SKU:
- 09350085
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE MANIFOLD TO CARBURETOR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
$11.95 -
JAMES GASKET Inspection Cover Seal - FLT/FXR 34906-79-DL
JAMES GASKET
$9.95Inspection cover seals are critical to maintaining your engine's integrity—they prevent oil seepage at the cover interface and protect against contamination that can compromise performance. JAMES...09350089- SKU:
- 09350089
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- APPLICATION:
- INSPECTION COVER
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$9.95 -
JAMES GASKET Trans Tab Lock 35216-36
JAMES GASKET
$8.20Transmission lock tab washers and snap rings wear out during rebuilds and high-mileage service—using OEM-quality replacements ensures proper retention and prevents catastrophic transmission failure...09350094- SKU:
- 09350094
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- TYPE:
- LOCK TAB
- UNITS:
- 5 PACK
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- STYLE:
- 4-SPEED
$8.20 -
JAMES GASKET Intake Spacer Kit 29250-55
JAMES GASKET
$22.95Fuel temperature management directly impacts carburetor performance and engine reliability, especially under high-load conditions where heat soak can cause vapor lock and poor drivability. The JAMES...09350100- SKU:
- 09350100
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- FIBER
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE MANIFOLD
- APPLICATION:
- CARBURETOR
- PRODUCT NAME:
- INSULATOR BLOCK KIT
- UNITS:
- KIT
$22.95 -
JAMES GASKET Rocker Cover Copper Washer Set 6114-C
JAMES GASKET
$7.95Rocker cover gasket leaks are a common headache for any serious engine builder, and worn copper washers are often the culprit. This OEM-quality washer set seals properly under load, preventing oil...09350101- SKU:
- 09350101
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- MATERIAL:
- COPPER
- APPLICATION:
- ROCKER COVER
- UNITS:
- KIT
$7.95 -
JAMES GASKET Rocker Cover Fiber Washer Set 6114-F
JAMES GASKET
$6.95A leaking rocker cover gasket compromises both engine aesthetics and performance by allowing oil to seep onto hot engine surfaces. The JAMES GASKET Rocker Cover Fiber Washer Set 6114-F delivers a...09350102- SKU:
- 09350102
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- FIBER
- PRODUCT NAME:
- WASHER
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- ROCKER COVER
$6.95 -
JAMES GASKET Rubber Rocker Cover Washer Set 6114-R
JAMES GASKET
$7.95Leaking rocker cover gaskets compromise engine sealing and create mess on your engine bay—James Gasket's rubber washer set provides the precision fit and durability needed to maintain a tight seal...09350103- SKU:
- 09350103
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- APPLICATION:
- ROCKER COVER
- MATERIAL:
- RUBBER
- UNITS:
- KIT
$7.95 -
JAMES GASKET Pushrod Base O-Ring - XL 11377
JAMES GASKET
$9.70A failing pushrod base O-ring compromises cylinder head sealing and invites oil leakage that degrades engine performance and reliability. The JAMES GASKET XL 11377 delivers OEM-equivalent sealing...09350106- SKU:
- 09350106
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- PUSHROD COVER
- PRODUCT NAME:
- O-RING
- APPLICATION:
- PUSHROD TUBE
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 10 PACK
$9.70 -
JAMES GASKET Pushrod O-Ring Kit - XL 11377-K
JAMES GASKET
$16.95A proper seal is the foundation of a reliable engine rebuild, and having the correct O-ring specifications on hand eliminates guesswork and prevents costly rework. The JAMES GASKET Pushrod O-Ring Kit...09350107- SKU:
- 09350107
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- PUSHROD COVER
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$16.95 -
JAMES GASKET Valve Stem Seal - Big Twin 18094-02
JAMES GASKET
$14.95Valve stem seals are critical to maintaining proper oil control in your Big Twin engine—without them, you're looking at oil blow-by, increased emissions, and accelerated wear on your valve guides and...09350108- SKU:
- 09350108
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- VALVE STEM
- PRODUCT NAME:
- SEAL
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
$14.95 -
JAMES GASKET Dip Stick O-Ring - Dyna/FLT 11120
JAMES GASKET
$8.30A worn or deteriorating dipstick O-ring allows oil to seep past the seal, leading to inaccurate oil level readings and potential oil loss during operation. This OEM-equivalent replacement restores a...09350114- SKU:
- 09350114
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- DIPSTICK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
$8.30 -
JAMES GASKET Clutch Side Mainshaft Seal - Big Twin 12044-DL
JAMES GASKET
$14.95A leaking mainshaft seal transforms a routine maintenance item into a costly engine repair. The JAMES GASKET Clutch Side Mainshaft Seal eliminates oil seepage at the source, protecting your crankcase...DS194426- SKU:
- DS194426
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- EACH
$14.95 -
JAMES GASKET Motor Sprocket Seal 12026-B
JAMES GASKET
$21.30Motor sprocket seals are critical to preventing oil seepage at the crankshaft, which can compromise engine cleanliness and lead to costly internal damage over time. The JAMES GASKET 12026-B is...DS194455- SKU:
- DS194455
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- APPLICATION:
- SPROCKET SHAFT
- PRODUCT NAME:
- SEAL
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$21.30
