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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On Sale
S&S CYCLE Pushrod Cover Kit - Chrome 106-1340
S&S CYCLE
MSRP: $193.95Now: $178.43Was: $193.95Keeping your pushrod covers clean and protected is essential for maintaining your engine's appearance and preventing debris accumulation that can affect performance. The S&S Cycle Pushrod Cover Kit...09280122- SKU:
- 09280122
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
MSRP: $193.95Now: $178.43Was: $193.95 -
On Sale
S&S CYCLE 129" Big Bore Cylinder Kit - Black - M8 910-0844
S&S CYCLE
MSRP: $1,499.95Now: $1,379.95Was: $1,499.95A 129" big bore displacement upgrade delivers the additional cubic inches your M8 engine needs to generate serious power gains without the hassle of a complete engine rebuild. S&S Cycle's bolt-on...09311080- SKU:
- 09311080
- Availability:
- Ships Same Business Day
- Weight:
- 28.51 LBS
MSRP: $1,499.95Now: $1,379.95Was: $1,499.95Qty in Cart: 0Quantity:Price:MSRP: $1,499.95Now: $1,379.95Was: $1,499.95Subtotal: -
FEULING OIL PUMP CORP. HP+ Oiling System/Camchest Kit - Twin Cam 7474
FEULING OIL PUMP CORP.
$1,429.95A worn camchest and oiling system directly compromises valve timing accuracy and hydraulic lifter performance—two critical factors that separate consistent power delivery from unpredictable...09320295- SKU:
- 09320295
- Availability:
- Ships Same Business Day
- Weight:
- 7.06 LBS
$1,429.95Qty in Cart: 0Quantity:Price:$1,429.95Subtotal: -
FEULING OIL PUMP CORP. Race Series Camchest Kit 7475
FEULING OIL PUMP CORP.
$1,659.95The Feuling Oil Pump Corp. Race Series Camchest Kit 7475 is engineered to maximize oil delivery and component longevity in high-revving Twin Cam engines where factory oiling margins fall short. If...09320296- SKU:
- 09320296
- Availability:
- Ships Same Business Day
- Weight:
- 7.06 LBS
$1,659.95Qty in Cart: 0Quantity:Price:$1,659.95Subtotal: -
FEULING OIL PUMP CORP. Anti-Rotation Lifter Pins 4100
FEULING OIL PUMP CORP.
$32.95Lifter noise and premature wear are common issues in high-performance engines, often traced back to improper lifter rotation and excessive clearance. The Feuling Oil Pump Corp. Anti-Rotation Lifter...09290088- SKU:
- 09290088
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$32.95 -
FEULING OIL PUMP CORP. Anti-Rotation Lifter Pins 4102
FEULING OIL PUMP CORP.
$32.95Lifter noise and misalignment are common culprits behind engine inefficiency and accelerated wear on your valvetrain. Feuling's Anti-Rotation Lifter Pins 4102 eliminate unwanted rotation that causes...09290089- SKU:
- 09290089
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$32.95 -
FEULING OIL PUMP CORP. Short Sump Plug - M8/Twin Cam 3115
FEULING OIL PUMP CORP.
$12.95If you're running a Harley-Davidson M8 or Twin Cam engine and want to maximize oil scavenging efficiency, this short sump plug is essential. By eliminating obstruction at the internal engine case...09500990- SKU:
- 09500990
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$12.95 -
FEULING OIL PUMP CORP. Short Sump Plug - 6 pack - M8/Twin Cam 3116
FEULING OIL PUMP CORP.
$62.95If you're running a high-performance M8 or Twin Cam engine, oil scavenging efficiency directly impacts bearing protection and engine reliability. The factory sump plug blocks the internal case...09500991- SKU:
- 09500991
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$62.95 -
DRAG SPECIALTIES Oil Filter - Black T14-0027B
DRAG SPECIALTIES
$15.70A clean oil system is non-negotiable for engine longevity and performance consistency. This Drag Specialties spin-on filter traps contaminants and particulates that would otherwise compromise bearing...07120648- SKU:
- 07120648
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
$15.70 -
On Sale
KIBBLEWHITE Dual Shim Spring Kit - M8 20-23400
KIBBLEWHITE
MSRP: $661.11Now: $595.00Was: $661.11Valve spring performance directly impacts your engine's ability to maintain lift consistency across the entire RPM range. The KIBBLEWHITE Dual Shim Spring Kit delivers the reliability and durability...09263416- SKU:
- 09263416
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
MSRP: $661.11Now: $595.00Was: $661.11 -
On Sale
KIBBLEWHITE Dual Shim Spring Kit - M8 20-23450
KIBBLEWHITE
MSRP: $546.73Now: $492.06Was: $546.73Valve spring performance directly impacts engine reliability, rpm capability, and overall power delivery—especially in high-revving or forced-induction applications. The Kibblewhite Dual Shim Spring...09263417- SKU:
- 09263417
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
MSRP: $546.73Now: $492.06Was: $546.73 -
On Sale
KIBBLEWHITE Dual Spring Kit - M8 20-23800
KIBBLEWHITE
MSRP: $634.37Now: $570.93Was: $634.37Valve spring performance directly impacts your engine's ability to maintain precise timing and withstand aggressive cam profiles. The KIBBLEWHITE Dual Spring Kit delivers the consistency and...09263420- SKU:
- 09263420
- Availability:
- Ships Same Business Day
- Weight:
- 1.58 LBS
MSRP: $634.37Now: $570.93Was: $634.37 -
On Sale
KIBBLEWHITE Dual Spring Kit - M8 20-23850
KIBBLEWHITE
MSRP: $528.57Now: $475.71Was: $528.57Precise valve control is critical for maximizing horsepower and reliability in high-performance engines. The KIBBLEWHITE Dual Spring Kit delivers the consistent, interference-wound spring geometry...09263421- SKU:
- 09263421
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
MSRP: $528.57Now: $475.71Was: $528.57Qty in Cart: 0Quantity:Price:MSRP: $528.57Now: $475.71Was: $528.57Subtotal: -
COVINGTONS Points Cover - Diamondback - Chrome - Twin Cam C3093-C
COVINGTONS
$77.95A quality points cover does more than protect your ignition components—it completes the visual statement of your engine bay while safeguarding critical electronics from moisture, debris, and heat...09402056- SKU:
- 09402056
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$77.95Qty in Cart: 0Quantity:Price:$77.95Subtotal: -
COVINGTONS Points Cover - Diamondback - Black - M8 C3095-B
COVINGTONS
$77.95A points cover serves as both a protective barrier and a visual statement on your engine. The Covingtons Diamondback delivers meticulous CNC-machined details that safeguard your ignition system while...09402057- SKU:
- 09402057
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$77.95 -
COVINGTONS Valve Cover - Smooth - Chrome - M8 C1286-C
COVINGTONS
$1,514.95A valve cover is more than just a protective shield—it's the first visual statement of your engine's quality. The Covington Smooth Chrome Valve Cover transforms your M8 engine bay with...09402052- SKU:
- 09402052
- Availability:
- Ships Same Business Day
- Weight:
- 10.93 LBS
$1,514.95 -
COVINGTONS Valve Cover - Diamondback - Black - M8 C3082-B
COVINGTONS
$1,641.95A quality valve cover does more than protect—it sets the tone for your engine bay's performance and aesthetics. The Covington Diamondback delivers CNC-machined precision in billet aluminum,...09402053- SKU:
- 09402053
- Availability:
- Ships Same Business Day
- Weight:
- 10.61 LBS
$1,641.95 -
COVINGTONS Valve Cover - Diamondback - Chrome - M8 C3082-C
COVINGTONS
$1,641.95A quality valve cover does more than protect your engine—it's a visual statement of precision engineering and maintenance standards. The COVINGTONS Diamondback delivers CNC-machined billet...09402054- SKU:
- 09402054
- Availability:
- Ships Same Business Day
- Weight:
- 11.46 LBS
$1,641.95 -
COVINGTONS Dipstick Cover - Diamondback - Black - Dyna/Touring/Trike C3085-B
COVINGTONS
$64.95Your Harley's engine bay deserves hardware that matches your bike's performance standard. The Covingtons Dipstick Cover elevates a functional component into a precision-machined detail that speaks to...07100276- SKU:
- 07100276
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
COVINGTONS Dipstick Cover - Diamondback - Chrome - Dyna/Touring/Trike C3085-C
COVINGTONS
$64.95A dipstick cover might seem like a minor detail, but it's one of the most visible components on your engine—and it should reflect the quality of your machine. The COVINGTONS Diamondback Cover...07100277- SKU:
- 07100277
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
$64.95
