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
-
PAUGHCO Top Motor Mount - FXWG/FXST 741H
PAUGHCO
$71.95A worn or inadequate motor mount compromises engine stability, increases vibration transfer to the frame, and can lead to accelerated wear on surrounding components. The PAUGHCO Top Motor Mount...09330029- SKU:
- 09330029
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- PRODUCT NAME:
- MOUNT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- TOP
$71.95Qty in Cart: 0Quantity:Price:$71.95Subtotal: -
PAUGHCO Pan Covers - Chrome 765
PAUGHCO
$264.95Engine pan covers protect your crankcase from road debris and environmental contaminants while delivering a polished, finished appearance to your engine bay. The PAUGHCO Pan Covers – Chrome 765...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 Right Tool Box Mount - Softail 403C2
PAUGHCO
$69.95Proper footpeg clearance is essential when running a right-side toolbox on your Softail—cramped foot positioning compromises control and comfort during extended rides. This PAUGHCO mount solves that...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: -
On Sale
PRO-ONE PERF.MFG. Ball Milled Inspection Cover - Big Twin 202150
PRO-ONE PERF.MFG.
MSRP: $60.45Now: $54.41Was: $60.45Proper engine bay presentation matters when you're running a Big Twin—and a quality inspection cover protects your top end while adding visual polish to your build. This PRO-ONE PERF.MFG. cover...DS375634C- 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
MSRP: $60.45Now: $54.41Was: $60.45 -
On Sale
PRO-ONE PERF.MFG. Milled Solid Billet Inspection Cover 202140
PRO-ONE PERF.MFG.
MSRP: $60.45Now: $54.41Was: $60.45An inspection cover isn't just protection—it's a statement of craftsmanship. The PRO-ONE PERF.MFG. Milled Solid Billet Inspection Cover eliminates unsightly factory covers and replaces them with...DS375001- 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
MSRP: $60.45Now: $54.41Was: $60.45 -
TRASK Assault Cam Cover - Raw - M8 TM-018R
TRASK
$429.95Monitor your M8's internal engine vitality in real-time with a transparent cam cover that eliminates guesswork during diagnostics and tuning. The TRASK Assault Cam Cover delivers the visual clarity...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 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-116WD
REVOLUTION PERFORMANCE, LLC
$495.95High-rpm stability and durability demand pistons engineered for extreme conditions—and this custom-forged kit delivers both. The RP301-116WD combines precision manufacturing with skirt coating and...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
$495.95 -
ROCKER LOCKERS Rocker Locker Kit - 84-00 Big Twin Evolution DK-RL-BTE
ROCKER LOCKERS
$24.95Harley rocker arm tick is a telltale sign of wear and play in your valve train—and it's a problem that compounds over time. The ROCKER LOCKERS Rocker Locker Kit centers your rocker plate and...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 -
On Sale
KIBBLEWHITE Intake Valve - Evolution 20-4171R
KIBBLEWHITE
MSRP: $29.81Now: $26.83Was: $29.81If you're serious about engine longevity and reliability under sustained high RPM operation, valve wear is your silent killer. The KIBBLEWHITE Intake Valve 20-4171R combines superior materials with...09260126- SKU:
- 09260126
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- STEM DIAMETER IMPERIAL:
- 0.3107'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 28°
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- HEAD DIAMETER IMPERIAL:
- 1.900'
- LENGTH IMPERIAL:
- 4.420'
MSRP: $29.81Now: $26.83Was: $29.81 -
On Sale
KIBBLEWHITE Intake Valve - 883/1200 XL 20-20550
KIBBLEWHITE
MSRP: $54.10Now: $48.69Was: $54.10If you're running a high-performance 883 or 1200 Sportster engine, valve durability and flow efficiency directly impact your power output and engine longevity. The KIBBLEWHITE intake valve combines...09262870- SKU:
- 09262870
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- STEM DIAMETER IMPERIAL:
- 7.00 MM
- HEAD DIAMETER IMPERIAL:
- 1.715'
- LENGTH IMPERIAL:
- 4.580'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 23°
MSRP: $54.10Now: $48.69Was: $54.10 -
KB PERFORMANCE Piston Kit KB266.040.3
KB PERFORMANCE
$246.95If you're building a high-performance engine that demands precision and longevity, KB Performance pistons deliver the tight tolerances and superior ring seal that separate a reliable power plant from...DS751252- SKU:
- DS751252
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
$246.95Qty in Cart: 0Quantity:Price:$246.95Subtotal: -
TP ENGINEERING Oil Pump Big Twin 45-0151-12
TP ENGINEERING
$524.95Most oil pumps starve your crankshaft at idle, forcing critical engine components to run dry during those crucial first moments after startup. TP Engineering's three-valve system solves this problem...DS194502- SKU:
- DS194502
- Availability:
- Ships Same Business Day
- Weight:
- 2.94 LBS
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- PRO SERIES
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- PUMP ASSEMBLY
- UNITS:
- KIT
$524.95Qty in Cart: 0Quantity:Price:$524.95Subtotal: -
THRASHIN SUPPLY CO. Point Cover - Classic - Polished - EVO TSC-3020-2
THRASHIN SUPPLY CO.
$49.95A quality point cover does more than protect your ignition system—it completes the aesthetic and functional integrity of your engine bay. This polished classic design from Thrashin Supply Co...09401712- SKU:
- 09401712
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- COVER
- STYLE:
- CLASSIC
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- POINT
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
On Sale
KIBBLEWHITE Cast Iron Valve Seat - Intake - Evolution 10-SC500
KIBBLEWHITE
MSRP: $12.43Now: $11.19Was: $12.43A quality valve seat directly impacts your engine's compression, sealing efficiency, and longevity under sustained load. The KIBBLEWHITE Cast Iron Valve Seat delivers superior machinability and...09260322- SKU:
- 09260322
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- CAST IRON
- VALVE SEAT HEIGHT IMPERIAL:
- 0.453'
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 1.535'
- OUTSIDE DIAMETER IMPERIAL:
- 1.9690'
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
MSRP: $12.43Now: $11.19Was: $12.43Qty in Cart: 0Quantity:Price:MSRP: $12.43Now: $11.19Was: $12.43Subtotal: -
On Sale
KIBBLEWHITE Valve Keys - 4 pairs - Big Twin 51003-4
KIBBLEWHITE
MSRP: $33.30Now: $29.97Was: $33.30Kibblewhite valve keys maintain precise valve timing and prevent slippage during high-RPM operation, critical for engine reliability in demanding conditions. These OEM-quality replacements ensure...09260776- SKU:
- 09260776
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- KEY
- TYPE:
- VALVE
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
- UNITS:
- SET OF 8
MSRP: $33.30Now: $29.97Was: $33.30 -
KB PERFORMANCE Piston Kit - FX/FL KB263.010
KB PERFORMANCE
$239.95If you're building or rebuilding an engine that demands precision and longevity, KB Performance pistons are engineered to deliver both. These diamond-machined pistons hold tolerances tighter than...DS751203- SKU:
- DS751203
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.437'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
$239.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.050
KB PERFORMANCE
$239.95If you're building a high-revving FX/FL engine that demands precision and reliability, KB Performance pistons deliver the tight tolerances and superior ring seal that separate competitive builds from...DS751207- SKU:
- DS751207
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- UNITS:
- KIT
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.437'
- BORE OVERSIZE - IMPERIAL:
- +0.050'
$239.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.060
KB PERFORMANCE
$239.95If you're building a high-performance engine that demands precision and longevity, KB Performance pistons deliver the tight tolerances and reliable ring seal that separate a well-tuned build from a...DS751208- SKU:
- DS751208
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.060'
- BORE SIZE IMPERIAL:
- 3.437'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
$239.95 -
KB PERFORMANCE Piston Kit - XL KB292.020
KB PERFORMANCE
$269.95KB Performance pistons are precision-engineered for racers and serious enthusiasts who demand tight tolerances and extended component life. The diamond-machined 390 hypereutectic aluminum...DS751219- SKU:
- DS751219
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 8.2:1
- BORE SIZE IMPERIAL:
- 3.208'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
$269.95 -
KB PERFORMANCE Piston Kit - XL KB292.030
KB PERFORMANCE
$269.95If you're building a high-performance engine that demands precision and reliability, KB Performance pistons are engineered to deliver both. The KB292.030 kit uses T-5 heat-treated 390 hypereutectic...DS751220- SKU:
- DS751220
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE SIZE IMPERIAL:
- 3.1875'
- COMPRESSION RATIO IMPERIAL:
- 8.2:1
$269.95
