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 Cylinder Head Kit - Big Twin 90-1498
S&S CYCLE
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepers, Complete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructions, Use OEM manifolds...09300009- SKU:
- 09300009
- Availability:
- Ships Same Business Day
- Weight:
- 25.35 LBS
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.500'
- FEATURES:
- SINGLE SPARK PLUG
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- UNITS:
- KIT
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95 -
TP ENGINEERING Pro Series Rocker Arms 45-0245-23
TP ENGINEERING
$732.95Premium rocker arms are forged from 4140 steel and CNC-machined for a perfect fit, Feature a roller tip for less drag and a solid bushing for extended life, Made in the U.S.A.TP24520- SKU:
- TP24520
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROLLER
- UNITS:
- 4 PACK
- MATERIAL:
- STEEL
- MODEL:
- PRO SERIES
- PRODUCT NAME:
- ROCKER ARM
$732.95 -
DRAG SPECIALTIES ROCKER BOX SHOVEL POL 89736
DRAG SPECIALTIES
$762.15DRAG SPECIALTIES ROCKER BOX SHOVEL POL09402015- SKU:
- 09402015
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- EACH
$762.15 -
DRAG SPECIALTIES ROCKER BOX SHOVEL CHR 80455
DRAG SPECIALTIES
$821.89DRAG SPECIALTIES ROCKER BOX SHOVEL CHR09402016- SKU:
- 09402016
- Availability:
- Ships Same Business Day
- Weight:
- 9.05 LBS
- TYPE:
- ROCKER BOX
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$821.89 -
VANCE & HINES Exhaust Port Gaskets - Big Twin/XL 22899
VANCE & HINES
$16.95Designed to work with Big Twin models' new spherical exhaust port; will also work on earlier style systems09341882- SKU:
- 09341882
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- TYPE:
- EXHAUST
$16.95 -
PAUGHCO Left Tool Box Mount - Softail 403C1
PAUGHCO
$64.95Chrome toolbox mounts feature a spacer and longer bolt for spacing the footpeg away from the toolbox, For the right or left-sides; toolboxes must be purchased separately, Made in the U.S.A.DS273663- SKU:
- DS273663
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MOUNTING POSITION:
- LEFT
- RIDING STYLE:
- STREET
- TYPE:
- TOOLBOX
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- MOUNTING KIT
- UNITS:
- KIT
- BASE FINISH:
- CHROME
$64.95 -
PAUGHCO Engine Adapter Plate - 88A Twin Cam 741TC
PAUGHCO
$262.95Mounts Twin Cam 88 "A" motor into any Evolution-style Softail or Rigid frame, Made in the U.S.A.09330027- SKU:
- 09330027
- Availability:
- Ships Same Business Day
- Weight:
- 2.88 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- ADAPTER PLATE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$262.95 -
PINGEL Rear Motor Mount - XL RM2
PINGEL
$200.95Heavy-duty - made of super-high-tensile alloy that is virtually indestructible, Heavily reinforced in all areas that tend to crack, Replaces two-bolt and four-bolt top case OEM mounts, Slips over studs and starter shaft on completely assembled motors,...DS243617- SKU:
- DS243617
- Availability:
- Ships Same Business Day
- Weight:
- 1.88 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- PRODUCT NAME:
- MOUNT
- UNITS:
- PAIR
$200.95 -
PRO-ONE PERF.MFG. Millen Point Cover - Big Twin 202110
PRO-ONE PERF.MFG.
$54.95Custom aluminum cover with a ball-milled designDS373964- SKU:
- DS373964
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- TYPE:
- POINT
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- MODEL:
- MILLENNIUM
- RIDING STYLE:
- STREET
$54.95 -
PRO-ONE PERF.MFG. Motor Mount - Chrome - EVO 204500
PRO-ONE PERF.MFG.
$159.45Machined from 6061 T-6 billet aluminum, Include necessary mounting hardware09330019- SKU:
- 09330019
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- MOTOR
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNT
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET
$159.45 -
NAMZ Hose Clamp - Chrome - 3/8" - 6-Pack NHC-CH206
NAMZ
$39.95Custom-colored hose clamps designed for use with braided copper and stainless steel hoses, and fit over most manufacturer's braided rubber hoses, Extruded from brass, Sold in packs of six - an average FXST or custom bike will use a minimum of six oil...07110212- SKU:
- 07110212
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- CLAMP
- TYPE:
- HOSE
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
- FITS HOSE SIZE METRIC:
- 9.5 MM
- MATERIAL:
- BRASS
- COLOR/FINISH:
- CHROME
- FITS HOSE SIZE IMPERIAL:
- 3/8'
- UNITS:
- 6 PACK
$39.95 -
TRASK Breather Kit - Big Twin DM-1999
TRASK
$249.95Machined T-6061 billet aluminum construction, Helps oil drain more efficiently into the rocker, Reduces oil misting coming from the engine breathers, Made in the U.S.A.09200118- SKU:
- 09200118
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- KIT
- PRODUCT NAME:
- BREATHER VALVE
- MATERIAL:
- ALUMINUM
$249.95 -
TRASK Assault Cam Cover - Chrome - M8 TM-018CH
TRASK
$429.95Transparent for viewing internal engine components, Matches Assault series of air cleaners, Made in the U.S.A.09401871- SKU:
- 09401871
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- CAM
- UNITS:
- EACH
$429.95 -
TRASK Assault Cam Cover - Raw - Twin Cam TM-017R
TRASK
$429.95Transparent for viewing internal engine components, Matches Assault series of air cleaners, Made in the U.S.A.09401848- SKU:
- 09401848
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- COLOR/FINISH:
- MACHINED
- TYPE:
- CAM
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
$429.95 -
TRASK Assault Cam Cover - Chrome - Twin Cam TM-017CH
TRASK
$429.95Transparent for viewing internal engine components, Matches Assault series of air cleaners, Made in the U.S.A.09401849- SKU:
- 09401849
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- CAM
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$429.95 -
TRASK Assault Cam Cover - Black - Twin Cam TM-017BK
TRASK
$429.95Transparent for viewing internal engine components, Matches Assault series of air cleaners, Made in the U.S.A.09401850- SKU:
- 09401850
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- BLACK
- TYPE:
- CAM
- UNITS:
- EACH
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
$429.95 -
TRASK Assault Cam Cover - Black - M8 TM-018BK
TRASK
$429.95Transparent for viewing internal engine components, Matches Assault series of air cleaners, Made in the U.S.A.09401872- SKU:
- 09401872
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- COLOR/FINISH:
- GLOSS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- TYPE:
- CAM
- UNITS:
- EACH
$429.95 -
ANDREWS High-Lift Upper Spring Collars 271100
ANDREWS
$53.95Cams with .600 lift can easily be accommodated when used with high-lift springs, Made from T-6 aluminum, collars are lightweight, hard-coated and very strong, For 74" and 80" motors, Made in the U.S.A.DS199735- SKU:
- DS199735
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- SPRING
- PRODUCT NAME:
- COLLAR
- UNITS:
- 4 PACK
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$53.95 -
ANDREWS Cam Set - Twin Cam 288160
ANDREWS
$415.95Cams work well with fuel injection or carburetor models, Run best with low restriction exhausts (1700-5200 rpm), Works well with carbs or fuel injection, Bolt-in cam for more torque with stock compression, Can be used with stock valve springs and...DS199182- SKU:
- DS199182
- Availability:
- Ships Same Business Day
- Weight:
- 3.31 LBS
- EXHAUST CLOSE IMPERIAL:
- 22°
- EXHAUST DURATION IMPERIAL:
- 260°
- EXHAUST OPEN IMPERIAL:
- 58°
- INTAKE LIFT IMPERIAL:
- 0.560'
- INTAKE LOBE CENTERLINE IMPERIAL:
- 106°
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.192'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 108°
- GRIND:
- 60 SERIES
- INTAKE OPEN IMPERIAL:
- 24°
- TYPE:
- CHAIN
- EXHAUST LIFT IMPERIAL:
- 0.560'
- INTAKE DURATION IMPERIAL:
- 260°
- INTAKE CLOSE IMPERIAL:
- 56°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.205'
- PRODUCT NAME:
- CAM KIT
$415.95 -
ANDREWS Cam Set - Twin Cam 288137G
ANDREWS
$463.95Cams work well with fuel injection or carburetor models, Run best with low restriction exhausts (1700-5200 rpm), Works well with carbs or fuel injection, Bolt-in cam for more torque with stock compression, Can be used with stock valve springs and...DS199247- SKU:
- DS199247
- Availability:
- Ships Same Business Day
- Weight:
- 3.02 LBS
- EXHAUST CLOSE IMPERIAL:
- 14°
- GRIND:
- 37 SERIES
- INTAKE CLOSE IMPERIAL:
- 38°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 100°
- PRODUCT NAME:
- CAM KIT
- APPLICATION:
- INTAKE
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.148'
- EXHAUST LIFT IMPERIAL:
- 0.510'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 106°
- EXHAUST OPEN IMPERIAL:
- 46°
- TYPE:
- GEAR
- APPLICATION:
- EXHAUST
- INTAKE DURATION IMPERIAL:
- 236°
- INTAKE LIFT IMPERIAL:
- 0.510'
- EXHAUST DURATION IMPERIAL:
- 240°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.174'
- INTAKE OPEN IMPERIAL:
- 18°
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$463.95
