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
$76.17Comes with mounting hardware, Sold as a kit for two heads09401313- 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
$74.11Comes with mounting hardware, Sold as a kit for two heads09401314- 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
$74.11 -
DRAG SPECIALTIES Spark Plug Cover - Black - Sportster 63426
DRAG SPECIALTIES
$76.17Comes with mounting hardware, Sold as a kit for two heads09401315- 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
$76.17 -
DRAG SPECIALTIES Spark Plug Cover - Silver - Sportster 63425
DRAG SPECIALTIES
$64.84Comes with mounting hardware, Sold as a kit for two heads09401316- 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
$95.74Comes with mounting hardware, Sold as a kit for two heads09401317- 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
$95.74 -
DRAG SPECIALTIES Spark Plug Cover - Chrome - Sportster 63427
DRAG SPECIALTIES
$76.17Comes with mounting hardware, Sold as a kit for two heads09401318- 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
$76.17 -
DRAG SPECIALTIES Points Cover - Chrome 78040
DRAG SPECIALTIES
$25.70Die-cast construction, Matches other Drag Specialties Split Skull products09401612- 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
$25.70Die-cast construction, Matches other Drag Specialties Split Skull products09401743- 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
$25.70Die-cast construction, Matches other Drag Specialties Split Skull products09401744- 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
$47.33Chrome-plated heavy-duty mounts are 30% thicker than stock, Mounts include chrome choke/horn bracketsDS243606- 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
$41.15High-quality, chrome one-piece design, Bolts not included with mountDS243615- 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
$39.09High-quality, chrome motor mountsDS243602- 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
$39.09 -
DRAG SPECIALTIES Heavy Duty Motor Mount - Softail 74807
DRAG SPECIALTIES
$68.96Chrome-plated heavy-duty mounts are 30% thicker than stock, Mounts include chrome choke/horn bracketsDS243607- 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
$129.73DRAG SPECIALTIES Gasket Board - 6 Speed09346982- 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
$117.37DRAG SPECIALTIES Gasket Board - 6 Speed09346983- 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
$160.63Complete four-color display features gaskets, seals and O-rings necessary to rebuild most XL Evolution motors, Mounts easily on any 1/8" or 1/4" peg board, Designed so that three 32" H x 48" W displays will fit on a single sheet of 4' x 8' pegboard,...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
$43.76Allows you to mount OEM late-model CV or Mikuni HSR-42 carbs on early Evolutions with two-bolt flange manifolds, CNC machined from 6061 billet aluminum, Mounting holes are 2.75" on center, Can be polished, plated or painted, Made in the U.S.A.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
$125.61Accept OEM gasket and mounting hardware09400438- 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
$131.79OEM quality cast aluminum alloy construction, Some fitments feature pistons with a coating that extends piston life, reduces friction and allows for cooler running engines, Ideal for OEM replacement, Economical with great performance, all in one package,...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
$147.24OEM quality cast aluminum alloy construction, Some fitments feature pistons with a coating that extends piston life, reduces friction and allows for cooler running engines, Ideal for OEM replacement, Economical with great performance, all in one package,...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:
