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
-
DRAG SPECIALTIES Spark Plug Cover - Black - Twin Cam 63422
DRAG SPECIALTIES
$76.17A 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
$76.17 -
DRAG SPECIALTIES Spark Plug Cover - Silver - Twin Cam 63421
DRAG SPECIALTIES
$74.11A 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
$74.11Qty in Cart: 0Quantity:Price:$74.11Subtotal: -
DRAG SPECIALTIES Spark Plug Cover - Black - Sportster 63426
DRAG SPECIALTIES
$76.17Spark 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
$76.17Qty in Cart: 0Quantity:Price:$76.17Subtotal: -
DRAG SPECIALTIES Spark Plug Cover - Silver - Sportster 63425
DRAG SPECIALTIES
$64.84A 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
$64.84 -
DRAG SPECIALTIES Spark Plug Cover - Chrome - Twin Cam 63428
DRAG SPECIALTIES
$95.74A 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
$95.74Qty in Cart: 0Quantity:Price:$95.74Subtotal: -
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
$25.70A 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
$25.70 -
DRAG SPECIALTIES Points Cover - Chrome 78102
DRAG SPECIALTIES
$25.70A 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
$25.70 -
DRAG SPECIALTIES Points Cover - Black 78102B
DRAG SPECIALTIES
$25.70Keep 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
$25.70 -
DRAG SPECIALTIES Heavy Duty Motor Mount - FXR 74806
DRAG SPECIALTIES
$47.33Engine 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
$47.33 -
DRAG SPECIALTIES Top Motor Mount 19092
DRAG SPECIALTIES
$41.15A 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
$41.15 -
DRAG SPECIALTIES Top Motor Mount 74021
DRAG SPECIALTIES
$39.09Engine movement under hard acceleration creates vibration that transfers through your chassis, robbing you of precision handling and accelerating wear on surrounding components. The Drag Specialties Top Motor Mount 74021 isolates that vibration with a...DS243602- SKU:
- DS243602
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- PRODUCT NAME:
- MOUNT
- TYPE:
- ENGINE
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- TOP
$39.09Qty in Cart: 0Quantity:Price:$39.09Subtotal: -
DRAG SPECIALTIES Heavy Duty Motor Mount - Softail 74807
DRAG SPECIALTIES
$68.96Stock motor mounts on Softail models can flex under hard acceleration and engine vibration, leading to premature wear and misalignment issues that compromise performance and longevity. These DRAG Specialties heavy-duty mounts eliminate that movement with...DS243607- SKU:
- DS243607
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- PRODUCT NAME:
- MOUNT
- TYPE:
- MOTOR
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- TOP
$68.96 -
DRAG SPECIALTIES Gasket Board - 6 Speed 0934-6982
DRAG SPECIALTIES
$129.73A properly sealed transmission is non-negotiable for reliable power delivery and longevity in any high-performance application. The DRAG SPECIALTIES Gasket Board for 6-speed transmissions provides OEM-equivalent sealing surfaces, preventing fluid leakage...09346982- SKU:
- 09346982
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET BOARD
- STYLE:
- 6 SPEED
$129.73 -
DRAG SPECIALTIES Gasket Board - 6 Speed 0934-6983
DRAG SPECIALTIES
$117.37A worn or degraded gasket board compromises transmission sealing, leading to fluid leaks, contamination, and potential drivetrain failure—especially critical in high-performance 6-speed applications where precision tolerances demand reliable sealing. The...09346983- SKU:
- 09346983
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- PRODUCT NAME:
- GASKET BOARD
- RIDING STYLE:
- STREET
- STYLE:
- 6 SPEED
- UNITS:
- EACH
$117.37 -
DRAG SPECIALTIES Gasket Board - XL 0934-1878
DRAG SPECIALTIES
$160.63If you're running a professional shop or serious home garage, keeping XL Evolution gaskets, seals, and O-rings organized and accessible is non-negotiable. This display board eliminates the guesswork when sourcing rebuild components—everything you need is...09341878- SKU:
- 09341878
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- PRODUCT NAME:
- DISPLAY BOARD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- GASKET
$160.63 -
DRAG SPECIALTIES Flange Adapter 289219
DRAG SPECIALTIES
$43.76If you're running an early Evolution engine with a two-bolt flange manifold, you're limited by carburetor options—until now. This adapter bridges the gap between your classic platform and modern late-model CV or Mikuni HSR-42 carburetors, giving you...DS289219- SKU:
- DS289219
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FLANGE ADAPTER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
$43.76 -
DRAG SPECIALTIES Cam Cover - Twin Cam 25247-99
DRAG SPECIALTIES
$125.61A properly sealed cam cover is critical for preventing oil leakage and maintaining engine cleanliness on Twin Cam motors. The DRAG SPECIALTIES Cam Cover 25247-99 delivers OEM-equivalent fitment and sealing performance without the premium price tag,...09400438- SKU:
- 09400438
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- MATERIAL:
- DIE-CAST
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- CAM
$125.61 -
DRAG SPECIALTIES Piston - Twin Cam 21988-07
DRAG SPECIALTIES
$131.79Twin Cam engines demand pistons that balance OEM reliability with measurable performance gains. This DRAG SPECIALTIES piston set delivers cast aluminum construction with a low-friction coating that reduces wear, lowers operating temperatures, and extends...09110017- SKU:
- 09110017
- Availability:
- Ships Same Business Day
- Weight:
- 2.61 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- PISTON DIAMETER IMPERIAL:
- 3.750'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 9.2:1
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON
$131.79 -
DRAG SPECIALTIES Piston - Twin Cam 21989-07+.005
DRAG SPECIALTIES
$147.24Twin Cam engines demand pistons that balance OEM reliability with cost-effectiveness, and this Drag Specialties offering delivers both without compromise. The cast aluminum alloy construction paired with a friction-reducing coating ensures cooler running...09110022- SKU:
- 09110022
- Availability:
- Ships Same Business Day
- Weight:
- 2.41 LBS
- PISTON DIAMETER IMPERIAL:
- 3.875'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE - OVERSIZE:
- +0,005'
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PRODUCT NAME:
- PISTON
$147.24Qty in Cart: 0Quantity:Price:$147.24Subtotal:
