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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JAGG OIL COOLERS Lifetime Oil Filter - 3/4" - 16 Thread 11-J77-34
JAGG OIL COOLERS
$149.95Tired of replacing oil filters every season? The JAGG Lifetime Oil Filter eliminates disposable waste while delivering superior filtration that protects your engine and preserves peak horsepower...07120555- SKU:
- 07120555
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COLOR/FINISH:
- SILVER
- MICRON RATING:
- 30 MICRONS
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- BASE COLOR:
- SILVER
- FILTER MEDIA MATERIAL:
- STAINLESS STEEL MESH
- MODEL:
- HYPERFLOW
- RIDING STYLE:
- STREET
$149.95Qty in Cart: 0Quantity:Price:$149.95Subtotal: -
JAGG OIL COOLERS Oil Filter Nipple 11-26352-95A
JAGG OIL COOLERS
$10.95If you're upgrading to a high-flow JAGG oil cooler system on your Harley-Davidson, you'll need the proper adapter to transition from your stock oil filter housing. This nipple ensures a seamless,...07130081- SKU:
- 07130081
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- OIL FILTER
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- ADAPTER
- RIDING STYLE:
- STREET
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
K & N Oil Filter - Chrome - Dyna KN-173C
K & N
$20.99If you're running synthetic or synthetic-blend oil in your Dyna, you need a filter engineered to handle it—K&N's premium synthetic media delivers the high flow rates and protection that racing oils...KN173C- SKU:
- KN173C
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- LENGTH METRIC:
- 152 MM
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- FEATURES:
- INCLUDES NUT
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- STYLE:
- STANDARD
- TYPE:
- SPIN-ON
- BASE COLOR:
- SILVER
$20.99Qty in Cart: 0Quantity:Price:$20.99Subtotal: -
On Sale
PRO-ONE PERF.MFG. Oil Cooler Kit with Temperature Gauge- Black - 1"- 1-1/4" 201110B
PRO-ONE PERF.MFG.
MSRP: $351.95Now: $316.76Was: $351.95Engine heat is the silent killer of performance—uncontrolled oil temperatures rob your engine of horsepower, reduce viscosity, and accelerate wear on critical components. The PRO-ONE PERF.MFG. Oil...07130075- SKU:
- 07130075
- Availability:
- Ships Same Business Day
- Weight:
- 3.75 LBS
- LENGTH IMPERIAL:
- 12'
- OUTSIDE DIAMETER METRIC:
- 57.2 MM
- BASE COLOR:
- BLACK
- FOR FRAME TUBE DIAMETER IMPERIAL:
- 1' - 1-1/4'
- PRODUCT NAME:
- OIL COOLER KIT
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- FOR FRAME TUBE DIAMETER METRIC:
- 25.4 MM - 31.8 MM
- LENGTH METRIC:
- 305 MM
- FEATURES:
- WITH TEMPERATURE GAUGE
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER IMPERIAL:
- 2-1/4'
- RIDING STYLE:
- STREET
MSRP: $351.95Now: $316.76Was: $351.95 -
On Sale
PRO-ONE PERF.MFG. Oil Cooler Kit with Temperature Gauge - 1"- 1-1/4" 201110
PRO-ONE PERF.MFG.
MSRP: $351.95Now: $316.76Was: $351.95High engine temperatures compromise oil viscosity and reduce bearing protection—an oil cooler is essential for sustained performance and engine longevity. The PRO-ONE Oil Cooler Kit delivers...07130052- SKU:
- 07130052
- Availability:
- Ships Same Business Day
- Weight:
- 3.26 LBS
- FOR FRAME TUBE DIAMETER METRIC:
- 25.4 MM - 31.8 MM
- BASE FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER IMPERIAL:
- 2-1/4'
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- FEATURES:
- WITH TEMPERATURE GAUGE
- FOR FRAME TUBE DIAMETER IMPERIAL:
- 1' - 1-1/4'
- LENGTH IMPERIAL:
- 12'
- LENGTH METRIC:
- 305 MM
- OUTSIDE DIAMETER METRIC:
- 57.2 MM
- PRODUCT NAME:
- OIL COOLER KIT
- UNITS:
- EACH
MSRP: $351.95Now: $316.76Was: $351.95 -
On Sale
COLONY Gas Valve Fitting Kit 7807-3
COLONY
MSRP: $34.95Now: $31.46Was: $34.95If you're running flexible hose lines on your fuel system, you need reliable fittings that won't leak under pressure or vibration. The COLONY Gas Valve Fitting Kit 7807-3 delivers the precision...DS193807- SKU:
- DS193807
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- FITTING KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- TYPE:
- GAS VALVE
MSRP: $34.95Now: $31.46Was: $34.95 -
On Sale
COLONY Oil Pump Nut Kit - Chrome 8110-12
COLONY
MSRP: $6.95Now: $6.26Was: $6.95If you're rebuilding a engine or servicing your oil pump, sourcing OEM-spec fasteners shouldn't be a hassle. The COLONY Oil Pump Nut Kit delivers hard-to-find 1/4"-24 hex nuts in a complete six-pack,...09320060- SKU:
- 09320060
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- OIL PUMP
- PRODUCT NAME:
- NUT
- BASE FINISH:
- CHROME
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
MSRP: $6.95Now: $6.26Was: $6.95Qty in Cart: 0Quantity:Price:MSRP: $6.95Now: $6.26Was: $6.95Subtotal: -
ALLOY ART Compression Release Adapter - 12 mm x 3/4" CRA-3
ALLOY ART
$20.95If you're running a twin plug head but only need single spark plug ignition, this adapter eliminates unnecessary complexity without removing your hardware. The ALLOY ART Compression Release Adapter...09500082- SKU:
- 09500082
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- ADAPTER
- TYPE:
- COMPRESSION RELEASE
- UNITS:
- EACH
- CONNECTOR ANGLE:
- STRAIGHT
- RIDING STYLE:
- STREET
- SIZE:
- 12 MM - 3/4'
$20.95Qty in Cart: 0Quantity:Price:$20.95Subtotal: -
FEULING OIL PUMP CORP. Point Cover - Wrench - Black - M8 9137
FEULING OIL PUMP CORP.
$69.95A points cover does more than protect your ignition system—it's a visible statement of craftsmanship on your engine. This FEULING billet aluminum cover transforms the cam area into a finished,...09401756- SKU:
- 09401756
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- RIDING STYLE:
- STREET
- TYPE:
- POINT
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
$69.95 -
On Sale
COLONY Relief Plug Chrome Big Twin 9607-2
COLONY
MSRP: $13.95Now: $12.56Was: $13.95Proper crankcase ventilation is essential for engine longevity and reliable performance on your Big Twin. The COLONY Relief Plug manages pressure buildup while preventing oil leakage, protecting your...09320054- SKU:
- 09320054
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- PLUG
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- RELIEF
MSRP: $13.95Now: $12.56Was: $13.95 -
On Sale
COLONY Relief Plug Chrome Big Twin 9605-2
COLONY
MSRP: $13.95Now: $12.56Was: $13.95Proper crankcase ventilation is essential for protecting your big twin engine from pressure buildup, oil seal degradation, and premature wear. The COLONY Relief Plug delivers precision engineering...09320052- SKU:
- 09320052
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- STREET
- TYPE:
- RELIEF
- BASE FINISH:
- CHROME
- TYPE:
- OIL PUMP
MSRP: $13.95Now: $12.56Was: $13.95Qty in Cart: 0Quantity:Price:MSRP: $13.95Now: $12.56Was: $13.95Subtotal: -
On Sale
COLONY Oil Plug Cadmium Big Twin 9877-2
COLONY
MSRP: $6.95Now: $6.26Was: $6.95A quality oil plug is a critical foundation for proper engine maintenance—it ensures a secure seal that prevents leaks and contamination while allowing for straightforward oil changes. The COLONY Oil...09320051- SKU:
- 09320051
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BASE COLOR:
- SILVER
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- COLOR/FINISH:
- CADMIUM
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- STREET
MSRP: $6.95Now: $6.26Was: $6.95 -
On Sale
KIBBLEWHITE Valve Seat 10-HC445
KIBBLEWHITE
MSRP: $14.47Now: $13.02Was: $14.47If you're running titanium valves in a high-performance engine, valve seat material matters more than most builders realize. The KIBBLEWHITE 10-HC445 is a copper-based seat engineered specifically to...09263356- SKU:
- 09263356
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER METRIC:
- 35.99 MM
- OUTSIDE DIAMETER IMPERIAL:
- 1.752'
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE SEAT
- RIDING STYLE:
- STREET
MSRP: $14.47Now: $13.02Was: $14.47Qty in Cart: 0Quantity:Price:MSRP: $14.47Now: $13.02Was: $14.47Subtotal: -
On Sale
KIBBLEWHITE Valve Seat 10-HC446
KIBBLEWHITE
MSRP: $14.47Now: $13.02Was: $14.47If you're running titanium valves in a high-performance engine, your valve seats need to keep pace with the demands of sustained RPM, extreme temperatures, and precision tolerances. KIBBLEWHITE's...09263357- SKU:
- 09263357
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 1.757'
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- VALVE SEAT
- INSIDE DIAMETER METRIC:
- 34.82 MM
MSRP: $14.47Now: $13.02Was: $14.47 -
On Sale
KIBBLEWHITE Valve Seat 10-HC510
KIBBLEWHITE
MSRP: $14.47Now: $13.02Was: $14.47If you're running titanium valves in a high-performance engine, valve seat material directly impacts your engine's thermal management, longevity, and reliability under extreme conditions. The...09263361- SKU:
- 09263361
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER METRIC:
- 40.89 MM
- OUTSIDE DIAMETER IMPERIAL:
- 2.008'
- PRODUCT NAME:
- VALVE SEAT
- APPLICATION:
- INTAKE
- RIDING STYLE:
- STREET
MSRP: $14.47Now: $13.02Was: $14.47Qty in Cart: 0Quantity:Price:MSRP: $14.47Now: $13.02Was: $14.47Subtotal: -
KB PERFORMANCE Super-Duty Piston KB661LCA.010
KB PERFORMANCE
$442.95Ring seal integrity and piston stability are foundational to engine longevity and performance. The KB PERFORMANCE Super-Duty Piston KB661LCA.010 eliminates common failure points—piston rock, ring...09105048- SKU:
- 09105048
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- BORE SIZE METRIC:
- 101.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- DISPLACEMENT:
- 110'
- RIDING STYLE:
- STREET
$442.95Qty in Cart: 0Quantity:Price:$442.95Subtotal: -
KB PERFORMANCE Piston - Evolution KB920C.020
KB PERFORMANCE
$285.57Reliable piston performance is the foundation of any high-revving engine build, and the KB PERFORMANCE Evolution KB920C.020 delivers the durability and precision you need for consistent power...09105057- SKU:
- 09105057
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,020'
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
$285.57Qty in Cart: 0Quantity:Price:$285.57Subtotal: -
KB PERFORMANCE Piston - Evolution KB921C.010
KB PERFORMANCE
$299.95KB Performance's Evolution KB921C.010 pistons deliver the reliability and precision your engine demands, whether you're pushing peak boost on the dyno or logging consistent lap times at the track...09105059- SKU:
- 09105059
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- PRODUCT NAME:
- PISTON KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE - OVERSIZE:
- +0,010'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
$299.95Qty in Cart: 0Quantity:Price:$299.95Subtotal: -
Hastings HASTINGS Piston Rings - XL 7003010
HASTINGS
$78.79Piston rings are fundamental to engine sealing and compression integrity—without quality rings, you're losing power, burning oil, and accelerating wear. Hastings' XL 7003010 delivers proven...DS750611- SKU:
- DS750611
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RING MATERIAL:
- MOLY COATED
- BORE - OVERSIZE:
- +0,010'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PRODUCT NAME:
- PISTON RING
- STYLE:
- OEM REPLACEMENT
- RIDING STYLE:
- STREET
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 3.197'
$78.79 -
Hastings HASTINGS Piston Rings - Shovelhead 6127010
HASTINGS
$65.08Piston rings are critical to maintaining compression, controlling oil consumption, and ensuring reliable ring seal across your Shovelhead's operating range. The Hastings 6127010 ring set combines...DS750631- SKU:
- DS750631
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RING MATERIAL:
- CAST
- STYLE:
- OEM REPLACEMENT
- BORE SIZE IMPERIAL:
- 3.508'
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,010'
$65.08
