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
-
Hastings HASTINGS Piston Rings - Twin Cam 2M4942005
HASTINGS
$97.95Worn or damaged piston rings compromise combustion efficiency, increase blow-by, and accelerate engine wear—directly impacting performance and longevity. The Hastings Twin Cam piston ring set restores proper ring seal, gas pressure containment, and oil...DS750688- SKU:
- DS750688
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- RING MATERIAL:
- MOLY COATED
- BORE SIZE IMPERIAL:
- 3.750'
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,005'
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- STYLE:
- OEM REPLACEMENT
$97.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4942+.010
HASTINGS
$37.95Piston rings are the critical sealing component between your pistons and cylinder walls—wear or degradation directly compromises compression, oil consumption, and power output. The Hastings 2M4942+.010 delivers OEM-grade construction with proven ring...DS750689- SKU:
- DS750689
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,010'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.750'
- PRODUCT NAME:
- PISTON RING
$37.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4941005
HASTINGS
$97.95Piston rings are the critical sealing component between your pistons and cylinder walls—they directly impact compression, blow-by control, and engine longevity. Hastings rings are engineered to strict OEM tolerances and built from proven materials that...DS750693- SKU:
- DS750693
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RING MATERIAL:
- MOLY COATED
- BORE - OVERSIZE:
- +0,005'
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- STYLE:
- OEM REPLACEMENT
$97.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4941010
HASTINGS
$97.95Piston rings are critical to engine sealing and blow-by control—worn or damaged rings result in compression loss, oil consumption, and reduced power output. The Hastings 2M4941010 delivers OEM-specification performance for Twin Cam engines, ensuring...DS750694- SKU:
- DS750694
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RING MATERIAL:
- MOLY COATED
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,010'
- STYLE:
- OEM REPLACEMENT
- BORE SIZE IMPERIAL:
- 3.875'
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$97.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4805
HASTINGS
$101.95Piston rings are critical to engine performance—they seal combustion pressure, regulate oil consumption, and directly impact horsepower delivery and longevity. The Hastings 2M4805 Twin Cam rings are engineered for high-demand applications where precision...09120467- SKU:
- 09120467
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.750'
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RING MATERIAL:
- MOLY COATED
- STYLE:
- OEM REPLACEMENT
$101.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4805005
HASTINGS
$101.95Piston rings are critical to engine sealing and performance—they maintain compression, control oil consumption, and prevent blow-by that degrades power and efficiency. Hastings piston rings are engineered to OEM specifications and manufactured with...09120468- SKU:
- 09120468
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- BORE SIZE IMPERIAL:
- 3.750'
- UNITS:
- SET
- RIDING STYLE:
- STREET
- STYLE:
- OEM REPLACEMENT
- BORE - OVERSIZE:
- +0,005'
- PRODUCT NAME:
- PISTON RING
- RING MATERIAL:
- MOLY COATED
$101.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4805010
HASTINGS
$101.95Piston rings are critical to engine sealing and compression integrity—worn or damaged rings lead to blow-by, oil consumption, and power loss. The Hastings Twin Cam 2M4805010 ring set delivers OEM-quality sealing with proven ring designs that balance...09120469- SKU:
- 09120469
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.750'
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,010'
- STYLE:
- OEM REPLACEMENT
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RING MATERIAL:
- MOLY COATED
$101.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4942
HASTINGS
$97.95Piston rings are critical to engine performance—they seal combustion pressure, regulate oil consumption, and directly impact compression and power delivery. The Hastings 2M4942 Twin Cam ring set delivers the precision engineering and material quality...DS750687- SKU:
- DS750687
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 3.750'
- PRODUCT NAME:
- PISTON RING
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
- STYLE:
- OEM REPLACEMENT
- RING MATERIAL:
- MOLY COATED
$97.95 -
Hastings HASTINGS Piston Rings - Twin Cam 2M4941
HASTINGS
$97.95Piston rings are the critical seal between your combustion chamber and crankcase—wear them out, and you're looking at blow-by, lost compression, and catastrophic engine failure. Hastings 2M4941 rings are engineered for Twin Cam engines with premium...DS750692- SKU:
- DS750692
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RING MATERIAL:
- MOLY COATED
- PRODUCT NAME:
- PISTON RING
- STYLE:
- OEM REPLACEMENT
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- UNITS:
- SET
$97.95 -
DRAG SPECIALTIES Spark Plug Cover - Black - Twin Cam 63422
DRAG SPECIALTIES
$78.39A quality spark plug cover protects critical ignition components from heat, debris, and moisture while maintaining a clean engine bay appearance. Twin Cam engines operate in demanding conditions, and DRAG SPECIALTIES' cover keeps your plug wires shielded...09401313- SKU:
- 09401313
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- COVER
- BASE COLOR:
- BLACK
- TYPE:
- SPARK PLUG
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
$78.39Qty in Cart: 0Quantity:Price:$78.39Subtotal: -
DRAG SPECIALTIES Spark Plug Cover - Silver - Twin Cam 63421
DRAG SPECIALTIES
$76.27A properly sealed spark plug cover protects critical ignition components from moisture, debris, and heat cycling that can degrade performance over time. This DRAG SPECIALTIES cover maintains a clean, professional appearance while safeguarding your Twin...09401314- SKU:
- 09401314
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- SILVER
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- TYPE:
- SPARK PLUG
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
$76.27Qty in Cart: 0Quantity:Price:$76.27Subtotal: -
DRAG SPECIALTIES Spark Plug Cover - Black - Sportster 63426
DRAG SPECIALTIES
$78.39Spark plug covers aren't just cosmetic—they protect your ignition system from moisture, heat, and debris while maintaining a clean engine bay aesthetic. On Sportster models, factory covers often crack or deteriorate, compromising both protection and...09401315- SKU:
- 09401315
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COLOR/FINISH:
- BLACK
- TYPE:
- SPARK PLUG
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- BASE COLOR:
- BLACK
- MATERIAL:
- ALUMINUM
- STYLE:
- FINNED
$78.39Qty in Cart: 0Quantity:Price:$78.39Subtotal: -
DRAG SPECIALTIES Spark Plug Cover - Silver - Sportster 63425
DRAG SPECIALTIES
$66.73A clean engine bay starts with quality details, and these Drag Specialties spark plug covers deliver both function and finish. Designed specifically for Sportster models, they protect your ignition components from moisture and debris while maintaining...09401316- SKU:
- 09401316
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- TYPE:
- SPARK PLUG
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
$66.73 -
DRAG SPECIALTIES Spark Plug Cover - Chrome - Twin Cam 63428
DRAG SPECIALTIES
$98.53A clean, professional engine bay starts with attention to detail—and spark plug covers are one of the first visual upgrades noticed on any Twin Cam build. This chrome cover kit delivers that polished aesthetic while protecting your ignition system from...09401317- SKU:
- 09401317
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BASE FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- SPARK PLUG
- STYLE:
- SMOOTH
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$98.53Qty in Cart: 0Quantity:Price:$98.53Subtotal: -
DRAG SPECIALTIES Spark Plug Cover - Chrome - Sportster 63427
DRAG SPECIALTIES
$76.17A clean, professional ignition system starts with quality details. Chrome spark plug covers protect your ignition components from moisture and debris while delivering the polished aesthetic that separates a well-maintained build from a neglected one...09401318- SKU:
- 09401318
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BASE FINISH:
- CHROME
- TYPE:
- SPARK PLUG
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- SMOOTH
- UNITS:
- EACH
$76.17Qty in Cart: 0Quantity:Price:$76.17Subtotal: -
DRAG SPECIALTIES Points Cover - Chrome 78040
DRAG SPECIALTIES
$26.45A points cover serves as both a functional ignition component protector and a visual statement on your engine bay. This Drag Specialties chrome piece combines corrosion resistance with a polished finish that complements any classic or custom build. If...09401612- SKU:
- 09401612
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- STYLE:
- BLACK SKULL
- TYPE:
- POINTS
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
$26.45 -
DRAG SPECIALTIES Points Cover - Chrome 78102
DRAG SPECIALTIES
$26.45A points cover does more than protect your ignition system—it completes the visual package of a custom build while safeguarding critical engine components from debris and moisture. If you're running Drag Specialties' Split Skull aesthetic across your...09401743- SKU:
- 09401743
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- STYLE:
- BLACK SKULL
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- TYPE:
- POINTS
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- STYLE:
- SKULL
$26.45 -
DRAG SPECIALTIES Points Cover - Black 78102B
DRAG SPECIALTIES
$26.45Keep your ignition system protected while maintaining a cohesive aesthetic with quality hardware. A points cover isn't just functional—it's a visible component that deserves the same attention to detail as the rest of your build. This die-cast cover...09401744- SKU:
- 09401744
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- STYLE:
- CHROME SKULL
- TYPE:
- POINTS
- RIDING STYLE:
- STREET
- STYLE:
- SKULL
- UNITS:
- EACH
$26.45 -
DRAG SPECIALTIES Heavy Duty Motor Mount - FXR 74806
DRAG SPECIALTIES
$48.71Engine vibration and movement can compromise your chassis geometry, transmission alignment, and overall drivetrain longevity—especially under hard acceleration or sustained performance driving. Heavy-duty motor mounts isolate these vibrations while...DS243606- SKU:
- DS243606
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- TOP
- PRODUCT NAME:
- MOUNT
- TYPE:
- MOTOR
- UNITS:
- KIT
$48.71 -
DRAG SPECIALTIES Top Motor Mount 19092
DRAG SPECIALTIES
$42.35A worn or failing motor mount compromises engine stability, increases vibration transmission to the chassis, and can lead to premature wear on surrounding components. The Drag Specialties Top Motor Mount 19092 delivers solid engine support with a...DS243615- SKU:
- DS243615
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- PRODUCT NAME:
- MOUNT
- UNITS:
- EACH
- MOUNTING POSITION:
- TOP
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$42.35
