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!
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- Price
- Subtotal
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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
$24.95 -
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 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 -
KIBBLEWHITE Valve Guide 20-4322
KIBBLEWHITE
$37.93If you're rebuilding a high-revving engine or restoring a classic with modern fuel compatibility in mind, valve guide quality directly impacts combustion efficiency, ring seal integrity, and overall engine longevity. The KIBBLEWHITE 20-4322 is a...09260761- SKU:
- 09260761
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- MATERIAL:
- C630 BRONZE
- RIDING STYLE:
- STREET
- BASE COLOR:
- BROWN
- OUTSIDE DIAMETER IMPERIAL:
- 0.5640'
- PRODUCT NAME:
- VALVE GUIDE
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- OVERSIZE (+0.002')
- APPLICATION:
- INTAKE
- COLOR/FINISH:
- BRONZE
- INSIDE DIAMETER IMPERIAL:
- 0.3090'
- UNITS:
- EACH
$37.93 -
KIBBLEWHITE Exhaust Valve - XL 20-4168
KIBBLEWHITE
$37.55Exhaust valves are where combustion forces meet component durability—and failure here costs you performance and engine reliability. The KIBBLEWHITE XL 20-4168 combines precision stainless-steel construction with a nitrided stellite tip to deliver...09260783- SKU:
- 09260783
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- LENGTH IMPERIAL:
- 3.620'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- TULIP ANGLE:
- 29°
- HEAD DIAMETER IMPERIAL:
- 1.750'
- STEM DIAMETER IMPERIAL:
- 0.3384'
$37.55 -
KIBBLEWHITE Exhaust Valve - XL 20-2012
KIBBLEWHITE
$37.55If you're running a high-performance engine that demands reliability under extreme conditions, valve durability isn't negotiable. KIBBLEWHITE's XL 20-2012 exhaust valves combine precision engineering with a proven nitriding process that outperforms...09260784- SKU:
- 09260784
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- HEAD DIAMETER IMPERIAL:
- 1.480'
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- LENGTH IMPERIAL:
- 4.625'
- STEM DIAMETER IMPERIAL:
- 0.3096'
- TULIP ANGLE:
- 40°
$37.55 -
KIBBLEWHITE Intake Valve - Big Twin 20-4256
KIBBLEWHITE
$31.01If you're running a Big Twin engine that demands consistent performance across extended high-RPM sessions, intake valve quality directly impacts combustion efficiency, heat dissipation, and component longevity. KIBBLEWHITE's stainless-steel,...09260786- SKU:
- 09260786
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- HEAD DIAMETER IMPERIAL:
- 2.000'
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.3765'
- TULIP ANGLE:
- 23°
- APPLICATION:
- INTAKE
- LENGTH IMPERIAL:
- 3.885'
- UNITS:
- EACH
$31.01 -
KIBBLEWHITE Intake Valve - XL 20-4196-1
KIBBLEWHITE
$37.55If you're running a high-revving engine that demands reliability under extreme conditions, valve wear is your silent killer. The KIBBLEWHITE Intake Valve XL 20-4196-1 combines superior materials with a proven nitriding process that outperforms...09260787- SKU:
- 09260787
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- HEAD DIAMETER IMPERIAL:
- 2.000'
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- TULIP ANGLE:
- 23°
- APPLICATION:
- INTAKE
- LENGTH IMPERIAL:
- 3.620'
- STEM DIAMETER IMPERIAL:
- 0.3090'
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
$37.55 -
KIBBLEWHITE Intake Valve - XL 20-4167
KIBBLEWHITE
$37.55If you're running a high-revving engine that demands reliability under sustained heat and load, valve wear becomes your limiting factor. The KIBBLEWHITE Intake Valve XL 20-4167 combines superior materials with a proprietary nitriding process to deliver...09260788- SKU:
- 09260788
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- HEAD DIAMETER IMPERIAL:
- 1.950'
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- STEM DIAMETER IMPERIAL:
- 0.3090'
- TULIP ANGLE:
- 23°
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 3.690'
$37.55 -
KIBBLEWHITE Intake Valve - XL 20-2010
KIBBLEWHITE
$37.55If you're running a high-revving engine or planning extended track sessions, valve wear becomes a real limiting factor in reliability and performance. The KIBBLEWHITE Intake Valve XL 20-2010 uses a proprietary nitriding process that delivers superior...09260789- SKU:
- 09260789
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TULIP ANGLE:
- 23°
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.3100'
- APPLICATION:
- INTAKE
- HEAD DIAMETER IMPERIAL:
- 1.715'
- LENGTH IMPERIAL:
- 4.550'
- UNITS:
- EACH
$37.55
