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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TRASK Assault Cam Cover - Chrome - Twin Cam TM-017CH
TRASK
$429.95TRASK Assault Cam Cover Chrome Twin Cam TM-017CHTransparent 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
$429.95TRASK Assault Cam Cover Black Twin Cam TM-017BKTransparent 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
$429.95TRASK Assault Cam Cover Black M8 TM-018BKTransparent 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 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-116WD
REVOLUTION PERFORMANCE, LLC
$495.95REVOLUTION PERFORMANCE, LLC Piston Kit RP301-116WDTop-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures...09106373- SKU:
- 09106373
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- DISPLACEMENT:
- 107'
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON HEAD SHAPE:
- DOMED
$495.95Qty in Cart: 0Quantity:Price:$495.95Subtotal: -
ANDREWS High-Lift Upper Spring Collars 271100
ANDREWS
$53.95ANDREWS High-Lift Upper Spring Collars 271100Cams 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
$53.95Qty in Cart: 0Quantity:Price:$53.95Subtotal: -
ANDREWS Cam Set - Twin Cam 288160
ANDREWS
$415.95ANDREWS Cam Set Twin Cam 288160Cams 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...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
$463.95ANDREWS Cam Set Twin Cam 288137GCams 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...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 -
ANDREWS Cam Set - Twin Cam 288155G
ANDREWS
$463.95ANDREWS Cam Set Twin Cam 288155GCams 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...DS199249- SKU:
- DS199249
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- APPLICATION:
- EXHAUST
- EXHAUST CLOSE IMPERIAL:
- 20°
- EXHAUST LIFT IMPERIAL:
- 0.550'
- INTAKE OPEN IMPERIAL:
- 22°
- GRIND:
- 55 SERIES
- INTAKE CLOSE IMPERIAL:
- 46°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.197'
- INTAKE LOBE CENTERLINE IMPERIAL:
- 102°
- UNITS:
- PAIR
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 252°
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.181'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 106°
- EXHAUST OPEN IMPERIAL:
- 52°
- INTAKE DURATION IMPERIAL:
- 248°
- INTAKE LIFT IMPERIAL:
- 0.550'
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- TYPE:
- GEAR
$463.95 -
SLYFOX COVER TIMING M8 MATTE CF 12056M
SLYFOX
$64.95SLYFOX COVER TIMING M8 MATTE CF 12056MSLYFOX COVER TIMING M8 MATTE CF09402030- SKU:
- 09402030
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- MATTE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- TIMING
$64.95 -
ROCKER LOCKERS Rocker Locker Kit - Twin Cam - 10 Pack DK-RL-TC-10
ROCKER LOCKERS
$133.30ROCKER LOCKERS Rocker Locker Kit Twin Cam 10 Pack DK-RL-TC-10Centers the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place, Eliminates the gap...09500924- SKU:
- 09500924
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- COLOR/FINISH:
- WHITE
- BASE COLOR:
- BRASS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- ROCKER LOCKER
- TYPE:
- STOCK
- UNITS:
- 10 PACK
$133.30 -
ROCKER LOCKERS Rocker Locker Kit - XL DK-RL-SPT
ROCKER LOCKERS
$24.95ROCKER LOCKERS Rocker Locker Kit XL DK-RL-SPTCenters the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place, Eliminates the gap between the rocker arm...09500925- SKU:
- 09500925
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- COLOR/FINISH:
- WHITE
- UNITS:
- KIT
- PRODUCT NAME:
- ROCKER LOCKER
- TYPE:
- STOCK
- BASE COLOR:
- BRASS
- BASE FINISH:
- NATURAL
- RIDING STYLE:
- STREET
$24.95 -
ROCKER LOCKERS Rocker Locker Kit - XL - 10 Pack DK-RL-SPT-10
ROCKER LOCKERS
$60.00ROCKER LOCKERS Rocker Locker Kit XL 10 Pack DK-RL-SPT-10Centers the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place, Eliminates the gap between the...09500926- SKU:
- 09500926
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- COLOR/FINISH:
- WHITE
- TYPE:
- STOCK
- BASE COLOR:
- BRASS
- BASE FINISH:
- NATURAL
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- ROCKER LOCKER
- UNITS:
- 10 PACK
$60.00 -
ROCKER LOCKERS Rocker Locker Kit - 86-06 XL DK-RL-SPT-8606
ROCKER LOCKERS
$24.95ROCKER LOCKERS Rocker Locker Kit 86-06 XL DK-RL-SPT-8606Centers the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place, Eliminates the gap between the...09500927- SKU:
- 09500927
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BASE COLOR:
- BRASS
- RIDING STYLE:
- STREET
- TYPE:
- STOCK
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- ROCKER LOCKER
$24.95 -
ROCKER LOCKERS Rocker Locker Kit - 86-06 XL - 10 Pack DK-RL-SPT860610
ROCKER LOCKERS
$60.00ROCKER LOCKERS Rocker Locker Kit 86-06 XL 10 Pack DK-RL-SPT860610Centers the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place, Eliminates the gap...09500928- SKU:
- 09500928
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BASE COLOR:
- BRASS
- RIDING STYLE:
- STREET
- TYPE:
- STOCK
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- WHITE
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- ROCKER LOCKER
$60.00 -
ROCKER LOCKERS Rocker Locker Kit - 84-00 Big Twin Evolution DK-RL-BTE
ROCKER LOCKERS
$24.95ROCKER LOCKERS Rocker Locker Kit 84-00 Big Twin Evolution DK-RL-BTECenters the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place, Eliminates the gap...09500929- SKU:
- 09500929
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BASE COLOR:
- BRASS
- RIDING STYLE:
- STREET
- TYPE:
- STOCK
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- UNITS:
- KIT
- COLOR/FINISH:
- WHITE
- BASE FINISH:
- NATURAL
- PRODUCT NAME:
- ROCKER LOCKER
$24.95 -
ROCKER LOCKERS Rocker Locker Kit - 84-00 Big Twin Evolution - 10 Pack DK-RL-BTE-10
ROCKER LOCKERS
$60.00ROCKER LOCKERS Rocker Locker Kit 84-00 Big Twin Evolution 10 Pack DK-RL-BTE-10Centers the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place,...09500930- SKU:
- 09500930
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- UNITS:
- 10 PACK
- BASE COLOR:
- BRASS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- ROCKER LOCKER
- TYPE:
- STOCK
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- COLOR/FINISH:
- WHITE
$60.00 -
ROCKER LOCKERS Rocker Locker Kit - Twin Cam - Aftermarket Support Plates DK-RL-AMSP-TC
ROCKER LOCKERS
$29.95ROCKER LOCKERS Rocker Locker Kit Twin Cam Aftermarket Support Plates DK-RL-AMSP-TCCenters the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place,...09500931- SKU:
- 09500931
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- ROCKER LOCKER
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- TYPE:
- AFTER MARKET SUPPORT PLATES
- UNITS:
- KIT
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- WHITE
- BASE COLOR:
- BRASS
- RIDING STYLE:
- STREET
$29.95 -
ROCKER LOCKERS Rocker Locker Kit - Twin Cam DK-RL-TC
ROCKER LOCKERS
$24.95ROCKER LOCKERS Rocker Locker Kit Twin Cam DK-RL-TCCenters the rocker plate eliminating different wear patterns on the rocker arm valve, Tapered design so that they lock themselves in and wedge the bolt shaft in place, Eliminates the gap between the...09500923- SKU:
- 09500923
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- SILVER
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- ROCKER LOCKER
- TYPE:
- STOCK
- BASE COLOR:
- BRASS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$24.95 -
JAMES GASKET Primary Cover Lock Plate - Big Twin 31497-65
JAMES GASKET
$6.95JAMES GASKET Primary Cover Lock Plate Big Twin 31497-65JAMES GASKET Primary Cover Lock Plate - Big Twin09500231- SKU:
- 09500231
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- COVER
- TYPE:
- LOCK PLATE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$6.95 -
TIMKEN Neck Bearing/Race SET14
TIMKEN
$26.98TIMKEN Neck Bearing/Race SET14Genuine Timken® brand, Made in the U.S.A.DS222700- SKU:
- DS222700
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- SET
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- APPLICATION:
- NECK POST
$26.98
