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
-
ANDREWS Cam Set - Twin Cam 288155G
ANDREWS
$463.95The ANDREWS 288155G cam set delivers measurable torque gains across the 1700-5200 rpm range, making it an ideal upgrade for riders seeking improved low-to-mid power without sacrificing reliability. This bolt-in cam works seamlessly with stock valve...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
$64.95Protect your M8 engine's timing cover while adding genuine carbon fiber aesthetic to your build. The SLYFOX timing cover combines lightweight durability with a refined matte finish that complements high-end engine bays. This is a direct bolt-on upgrade...09402030- 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 arm tick is a persistent problem that compromises both engine reliability and ride quality on Twin Cam Harley-Davidsons. This kit eliminates the root cause—inconsistent wear patterns and play between the rocker arm shaft and bolt—by centering the...09500924- SKU:
- 09500924
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 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
$24.95Harley rocker arm tick is more than just annoying—it's a sign that your rocker plates are wearing unevenly and your valve train geometry is compromised. The ROCKER LOCKERS XL kit solves this by centering your rocker plate and eliminating the play between...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 -
On Sale
ROCKER LOCKERS Rocker Locker Kit - XL - 10 Pack DK-RL-SPT-10
ROCKER LOCKERS
Now: $35.00Was: $54.00Rocker arm tick is more than an annoyance—it's a sign that your rocker plates are shifting under load, creating uneven wear patterns that accelerate component degradation. The ROCKER LOCKERS XL Kit solves this problem by centering your rocker plates and...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
Now: $35.00Was: $54.00 -
ROCKER LOCKERS Rocker Locker Kit - 86-06 XL DK-RL-SPT-8606
ROCKER LOCKERS
$24.95Harley rocker arm tick is more than just an annoying noise—it's a sign that your rocker plates are shifting under load, causing uneven wear and potential valve train instability. The ROCKER LOCKERS Rocker Locker Kit eliminates this problem by centering...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 -
On Sale
ROCKER LOCKERS Rocker Locker Kit - 86-06 XL - 10 Pack DK-RL-SPT860610
ROCKER LOCKERS
Now: $35.00Was: $54.00Harley rocker arm tick is more than just an annoying noise—it's a sign of wear that compounds over time. ROCKER LOCKERS eliminate the gap between your rocker arm shaft and bolt, centering the rocker plate to prevent uneven wear patterns that accelerate...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
Now: $35.00Was: $54.00 -
On Sale
ROCKER LOCKERS Rocker Locker Kit - 84-00 Big Twin Evolution - 10 Pack DK-RL-BTE-10
ROCKER LOCKERS
Now: $35.00Was: $54.00Harley rocker arm tick is more than just an annoying noise—it's a sign that your rocker plates are wearing unevenly and your valve train is losing precision. The ROCKER LOCKERS kit eliminates this problem by centering the rocker plate and locking it in...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
Now: $35.00Was: $54.00 -
ROCKER LOCKERS Rocker Locker Kit - Twin Cam - Aftermarket Support Plates DK-RL-AMSP-TC
ROCKER LOCKERS
$29.95Harley twin-cam engines are prone to rocker arm wear and the distinctive tick that comes with it. ROCKER LOCKERS' aftermarket support plates solve this problem by eliminating the play between your rocker arm shaft and bolt, centering the rocker plate to...09500931- SKU:
- 09500931
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 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
$24.95If you're running a Twin Cam Harley and dealing with persistent rocker arm tick, this kit addresses the root cause: inconsistent wear patterns and play between the rocker arm shaft and bolt. By centering the rocker plate and locking it in place with a...09500923- SKU:
- 09500923
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 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
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
JAMES GASKET Primary Cover Lock Plate - Big Twin 31497-65
JAMES GASKET
$6.95A properly secured primary cover is fundamental to maintaining clutch integrity and preventing oil seepage on Big Twin engines. The JAMES GASKET Primary Cover Lock Plate delivers reliable retention and a precision fit without modification, ensuring your...09500231- SKU:
- 09500231
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- COVER
- TYPE:
- LOCK PLATE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$6.95 -
TIMKEN Neck Bearing/Race SET14
TIMKEN
$26.98Neck bearings and races are critical load-bearing components that directly impact steering responsiveness, wheel alignment stability, and overall chassis dynamics. A worn or damaged bearing set introduces play, vibration, and premature wear throughout...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 -
TIMKEN Neck Post Bearing - Big Twin/XL L44643-20024
TIMKEN
$24.54The neck post bearing is a critical chassis component that supports steering geometry and absorbs cornering loads. A worn or damaged bearing compromises handling precision and can lead to premature wear on connected components. This genuine Timken...DS222855- SKU:
- DS222855
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- EACH
- APPLICATION:
- NECK POST
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
$24.54 -
KIBBLEWHITE Valve Kit - Twin Cam 20-23100
KIBBLEWHITE
$142.70Your Twin Cam engine demands valve components engineered for reliability and longevity, especially if you're running extended intervals or high-revving applications. The KIBBLEWHITE Valve Kit delivers premium stainless steel construction with a...09263219- SKU:
- 09263219
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- VALVE KIT
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
$142.70 -
KIBBLEWHITE Complete Valve Kit - Twin Cam 20-23150
KIBBLEWHITE
$255.90A complete valve kit is essential for any Twin Cam engine rebuild or refresh—it ensures consistent combustion, reduces blowby, and restores the cylinder head to factory performance specifications. KIBBLEWHITE's Black Diamond™ stainless steel valves are...09263220- SKU:
- 09263220
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- ENGINE KIT
- SPRING LIFT:
- 0,610'
- SPRING OPEN PRESSURE:
- 400 LB
- UNITS:
- KIT
- SPRING LIFT IMPERIAL:
- 0.610'
- SPRING SEAT PRESSURE:
- 175 LB
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
$255.90 -
KIBBLEWHITE Valve Kit - M8 20-23300
KIBBLEWHITE
$235.69Valve degradation is one of the fastest paths to power loss and catastrophic engine failure—especially in high-performance applications where heat and friction never stop working against you. KIBBLEWHITE's Black Diamond™ stainless steel valves eliminate...09263221- SKU:
- 09263221
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- VALVE KIT
- MODEL:
- BLACK DIAMOND™
- MATERIAL:
- STAINLESS STEEL
$235.69 -
KIBBLEWHITE Intake Valve - Twin Cam 20-20056
KIBBLEWHITE
$29.81If you're running a Twin Cam engine at the track or on the street, valve durability directly impacts reliability and performance. The Kibblewhite 20-20056 intake valve combines precision engineering with proven metallurgy to deliver superior wear...09260407- SKU:
- 09260407
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- HEAD DIAMETER IMPERIAL:
- 1.900'
- LENGTH IMPERIAL:
- 4.420'
- STEM DIAMETER IMPERIAL:
- 0.3106'
- APPLICATION:
- INTAKE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TULIP ANGLE:
- 28°
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
$29.81 -
KIBBLEWHITE Cast Iron Valve Guide 20-2062C
KIBBLEWHITE
$8.83Precision valve guides are critical to maintaining proper valve sealing and preventing excessive wear in high-performance and stock engines alike. The KIBBLEWHITE Cast Iron Valve Guide 20-2062C delivers OEM-quality engineering with the durability to...09260758- SKU:
- 09260758
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 0.6270'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$8.83 -
KIBBLEWHITE Cast Iron Valve Guide 20-2050C
KIBBLEWHITE
$8.83Precision valve guides are critical to maintaining proper valve alignment, controlling stem wear, and ensuring consistent combustion chamber sealing—especially in high-performance or high-mileage engines. The KIBBLEWHITE Cast Iron Valve Guide 20-2050C...09260759- SKU:
- 09260759
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.6250'
- UNITS:
- EACH
$8.83 -
KIBBLEWHITE Cast Iron Valve Guide 20-2060C
KIBBLEWHITE
$8.83A precision valve guide is the foundation of reliable cylinder head performance, ensuring proper valve alignment and minimizing stem wear across extended race seasons or high-mileage builds. The KIBBLEWHITE 20-2060C cast iron valve guide delivers...09260760- SKU:
- 09260760
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- OUTSIDE DIAMETER IMPERIAL:
- 0.6250'
$8.83
