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 Connecting Rod Set 80856
DRAG SPECIALTIES
$599.91If you're rebuilding a stock motor or replacing worn connecting rods, this Drag Specialties set delivers OEM-equivalent durability without the guesswork. Each rod is forged, heat-treated steel...09230689- SKU:
- 09230689
- Availability:
- Ships Same Business Day
- Weight:
- 6.85 LBS
$599.91 -
DRAG SPECIALTIES Bezel Dipstick - Black - Sportster 81029
DRAG SPECIALTIES
$28.57Accurate oil level monitoring is fundamental to engine longevity, and a damaged or missing dipstick compromises your ability to maintain proper lubrication in your Sportster. This Drag Specialties...07100282- SKU:
- 07100282
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$28.57 -
DRAG SPECIALTIES Bezel Dipstick - Chrome - Sportster 81028
DRAG SPECIALTIES
$16.91A quality dipstick bezel serves as both a functional oil-level indicator and a visible component on your engine. The DRAG Specialties chrome bezel dipstick combines durability with a polished finish...07100283- SKU:
- 07100283
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$16.91 -
DRAG SPECIALTIES Oil Filter Assembly - Chrome 14-0007
DRAG SPECIALTIES
$152.20A quality oil filter assembly is critical to engine longevity—it removes harmful contaminants before they can cause wear on internal components. The Drag Specialties Chrome 14-0007 combines...07120658- SKU:
- 07120658
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
$152.20Qty in Cart: 0Quantity:Price:$152.20Subtotal: -
DRAG SPECIALTIES Oil Filter Assembly - Black 14-0007MB
DRAG SPECIALTIES
$152.20A clean oil system is the foundation of reliable engine performance, and this Drag Specialties Oil Filter Assembly delivers the filtration your engine demands without compromising flow. The die-cast...07120659- SKU:
- 07120659
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
$152.20 -
PERFORMANCE MACHINE (PM) Race Series Cam Cover - Black Ops - M8 0177-2076-SMB
PERFORMANCE MACHINE (PM)
$362.95Your M8's stock cam cover is functional—but it's not optimized for performance. The PM Race Series Cam Cover replaces it with a precision-machined component that actively manages heat dissipation...09402134- SKU:
- 09402134
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
$362.95 -
PERFORMANCE MACHINE (PM) Race Series Clutch Cover - Hydraulic - Black Ops 0066-2037-SMB
PERFORMANCE MACHINE (PM)
$329.95Stock clutch covers dissipate heat poorly and look outdated—especially under track conditions where thermal management directly impacts clutch engagement and longevity. The PM Race Series Clutch...09402135- SKU:
- 09402135
- Availability:
- Ships Same Business Day
- Weight:
- 2.43 LBS
$329.95 -
PERFORMANCE MACHINE (PM) Race Series Clutch Cover - Cable - Black Ops 0177-2077-SMB
PERFORMANCE MACHINE (PM)
$274.95A stock clutch cover dissipates heat inconsistently, compromising engagement feel and longevity under sustained racing conditions. The PM Race Series Clutch Cover replaces that liability with...09402136- SKU:
- 09402136
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
$274.95 -
PERFORMANCE MACHINE (PM) Race Series Transmission Cover - Black Ops - M8 0203-2021-SMB
PERFORMANCE MACHINE (PM)
$197.95Your stock transmission cover is doing nothing but sitting there—until you need it to. The PM Race Series Transmission Cover upgrades your M8 with CNC-machined precision, superior heat dissipation,...09402139- SKU:
- 09402139
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$197.95 -
PERFORMANCE MACHINE (PM) Rocker Box Cover - Race Series - Black Ops - M8 0177-2084-SMB
PERFORMANCE MACHINE (PM)
$714.95Stock rocker box covers trap heat and limit airflow around your engine's hottest components—upgrading to PM's Race Series covers improves thermal management while delivering the aggressive aesthetic...09402140- SKU:
- 09402140
- Availability:
- Ships Same Business Day
- Weight:
- 6.45 LBS
$714.95Qty in Cart: 0Quantity:Price:$714.95Subtotal: -
S&S CYCLE T124 Long Block Engine- Stone Gray - Touring 310-0511A
S&S CYCLE
$8,595.95The S&S Cycle T124 long block delivers big-displacement power without requiring a complete engine teardown and rebuild. Factory-fresh from S&S with premium internals—Super Stock heads, high-flow oil...09010260- SKU:
- 09010260
- Availability:
- Ships Same Business Day
- Weight:
- 157.00 LBS
$8,595.95Qty in Cart: 0Quantity:Price:$8,595.95Subtotal: -
S&S CYCLE Engine Case - MK-Series - M8 Touring 310-1170
S&S CYCLE
$2,499.95If you're building a high-performance M8 Touring engine or restoring one to OEM specifications, you need a crankcase that won't fail under sustained load. The S&S Cycle MK-Series engine case is...09200239- SKU:
- 09200239
- Availability:
- Ships Same Business Day
- Weight:
- 41.70 LBS
$2,499.95 -
DRAG SPECIALTIES Connecting Rod Assembly - Big Twin 24281-41A-BXLB1Z
DRAG SPECIALTIES
$416.53A failing connecting rod assembly compromises engine reliability and performance—especially in high-demand Big Twin applications. This DRAG SPECIALTIES assembly restores OEM-spec integrity with...09230690- SKU:
- 09230690
- Availability:
- Ships Same Business Day
- Weight:
- 4.73 LBS
$416.53 -
DRAG SPECIALTIES Connecting Rod Assembly - Big Twin 24281-74A-BXLB1Z
DRAG SPECIALTIES
$416.53A connecting rod assembly is critical to reliable engine operation—it transfers combustion force from the piston to the crankshaft, so it must withstand extreme pressures and temperatures cycle after...09230691- SKU:
- 09230691
- Availability:
- Ships Same Business Day
- Weight:
- 4.71 LBS
$416.53 -
DRAG SPECIALTIES Connecting Rod Assembly - Big Twin 24281-83-BX-LB1Z
DRAG SPECIALTIES
$425.01Whether you're rebuilding a stock Big Twin or need reliable OEM-spec replacements, this connecting rod assembly delivers the durability and precision your engine demands. Forged heat-treated steel...09230692- SKU:
- 09230692
- Availability:
- Ships Same Business Day
- Weight:
- 4.87 LBS
$425.01 -
S&S CYCLE Cam Chest Kit without Cams - Gear Drive - Water Cooled - Black Pushrods - M8 310-1260
S&S CYCLE
$1,623.95If you're running a water-cooled M8 and pushing RPMs hard, your cam chest is working overtime. S&S Cycle's Cam Chest Kit delivers precision-machined components engineered to handle elevated output...09251570- SKU:
- 09251570
- Availability:
- Ships Same Business Day
- Weight:
- 10.13 LBS
$1,623.95 -
S&S CYCLE Cam Chest Kit without Cams - Gear Drive - Water Cooled - Chrome Pushrods - M8 310-1261
S&S CYCLE
$1,623.95A high-flow cam chest and oil management system is critical for maintaining consistent oil pressure, reducing valvetrain noise, and supporting aggressive engine builds. The S&S Cycle Cam Chest Kit...09251571- SKU:
- 09251571
- Availability:
- Ships Same Business Day
- Weight:
- 9.99 LBS
$1,623.95 -
S&S CYCLE Cam Chest Kit without Cams - Chain Drive - Water Cooled - Black Pushrods - M8 310-1264
S&S CYCLE
$1,522.95A high-performance cam chest kit demands precision engineering and reliable oil management—especially when you're pushing your M8 to its limits. This S&S Cycle kit delivers independent scavenge...09251574- SKU:
- 09251574
- Availability:
- Ships Same Business Day
- Weight:
- 8.74 LBS
$1,522.95Qty in Cart: 0Quantity:Price:$1,522.95Subtotal: -
S&S CYCLE Cam Chest Kit without Cams - Gear Drive - Oil Cooled - Black Pushrods - M8 310-1258
S&S CYCLE
$1,623.95If you're running an M8 engine at serious RPM, your stock cam chest can't keep pace with your ambitions. This S&S Cycle Cam Chest Kit delivers precision engineering where it matters most—superior oil...09251568- SKU:
- 09251568
- Availability:
- Ships Same Business Day
- Weight:
- 10.31 LBS
$1,623.95 -
S&S CYCLE Cam Chest Kit without Cams - Gear Drive - Oil Cooled - Black Pushrods - Twin Cam 310-1266
S&S CYCLE
$1,522.95If you're running a Twin Cam engine that demands reliable oil delivery and consistent valve train performance at high RPM, this S&S Cycle cam chest kit delivers the precision engineering you need...09251576- SKU:
- 09251576
- Availability:
- Ships Same Business Day
- Weight:
- 9.08 LBS
$1,522.95
