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
-
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1498
S&S CYCLE
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95S&S CYCLE Cylinder Head Kit Big Twin 90-1498Heads 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...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 POL 89736DRAG 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 CHR 80455DRAG 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
$16.95VANCE & HINES Exhaust Port Gaskets Big Twin/XL 22899Designed 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 Top Motor Mount - FXWG/FXST 741H
PAUGHCO
$71.95PAUGHCO Top Motor Mount FXWG/FXST 741HHigh-quality top motor mount, Bolts not included, Made in the U.S.A., Also work with Paughco frames.09330029- SKU:
- 09330029
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PRODUCT NAME:
- MOUNT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- TOP
$71.95 -
PAUGHCO Pan Covers - Chrome 765
PAUGHCO
$264.95PAUGHCO Pan Covers Chrome 765Chrome, heavy-gauge steel construction, Felt pads are available separately, Made in the U.S.A.DS376503- SKU:
- DS376503
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- BASE FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- COLOR/FINISH:
- CHROME
- MATERIAL:
- STEEL
- PRODUCT NAME:
- COVER
- UNITS:
- PAIR
$264.95Qty in Cart: 0Quantity:Price:$264.95Subtotal: -
PAUGHCO Left Tool Box Mount - Softail 403C1
PAUGHCO
$64.95PAUGHCO Left Tool Box Mount Softail 403C1Chrome 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
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
PAUGHCO Right Tool Box Mount - Softail 403C2
PAUGHCO
$69.95PAUGHCO Right Tool Box Mount Softail 403C2Chrome 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.DS273664- SKU:
- DS273664
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TOOLBOX
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- RIGHT
- UNITS:
- KIT
- PRODUCT NAME:
- MOUNTING KIT
- BASE FINISH:
- CHROME
$69.95Qty in Cart: 0Quantity:Price:$69.95Subtotal: -
PAUGHCO Engine Adapter Plate - 88A Twin Cam 741TC
PAUGHCO
$262.95PAUGHCO Engine Adapter Plate 88A Twin Cam 741TCMounts 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
$200.95PINGEL Rear Motor Mount XL RM2Heavy-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...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.
$54.95PRO-ONE PERF.MFG. Millen Point Cover Big Twin 202110Custom 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. Ball Milled Inspection Cover - Big Twin 202150
PRO-ONE PERF.MFG.
$60.45PRO-ONE PERF.MFG. Ball Milled Inspection Cover Big Twin 202150Include chrome hardwareDS375634C- SKU:
- DS375634C
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- TYPE:
- INSPECTION
- UNITS:
- EACH
- STYLE:
- BALL-MILLED
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
$60.45Qty in Cart: 0Quantity:Price:$60.45Subtotal: -
PRO-ONE PERF.MFG. Motor Mount - Chrome - EVO 204500
PRO-ONE PERF.MFG.
$159.45PRO-ONE PERF.MFG. Motor Mount Chrome EVO 204500Machined 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 -
PRO-ONE PERF.MFG. Milled Solid Billet Inspection Cover 202140
PRO-ONE PERF.MFG.
$60.45PRO-ONE PERF.MFG. Milled Solid Billet Inspection Cover 202140Include chrome hardwareDS375001- SKU:
- DS375001
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
- TYPE:
- INSPECTION
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- SMOOTH
- UNITS:
- EACH
$60.45Qty in Cart: 0Quantity:Price:$60.45Subtotal: -
NAMZ Hose Clamp - Chrome - 3/8" - 6-Pack NHC-CH206
NAMZ
$39.95NAMZ Hose Clamp Chrome 3/8" 6-Pack NHC-CH206Custom-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...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
$249.95TRASK Breather Kit Big Twin DM-1999Machined 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
$429.95TRASK Assault Cam Cover Chrome M8 TM-018CHTransparent 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 - M8 TM-018R
TRASK
$429.95TRASK Assault Cam Cover Raw M8 TM-018RTransparent for viewing internal engine components, Matches Assault series of air cleaners, Made in the U.S.A.09401873- SKU:
- 09401873
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CAM
- UNITS:
- EACH
- COLOR/FINISH:
- MACHINED
- COLOR/FINISH:
- RAW
- PRODUCT NAME:
- COVER
$429.95 -
TRASK Assault Cam Cover - Raw - Twin Cam TM-017R
TRASK
$429.95TRASK Assault Cam Cover Raw Twin Cam TM-017RTransparent 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
