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
-
DRAG SPECIALTIES Peaked Oil Tank Plug - Softail 63187
DRAG SPECIALTIES
$48.71A quality oil tank plug isn't just a fill cap—it's a seal that prevents leaks, contamination, and oil loss during high-performance operation. The Drag Specialties Peaked Oil Tank Plug combines...07100116- SKU:
- 07100116
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- PLUG
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
- STYLE:
- PEAKED
- TYPE:
- OIL TANK
- UNITS:
- EACH
$48.71 -
DRAG SPECIALTIES Peaked Design Oil Dipstick - Softail 63187A
DRAG SPECIALTIES
$58.25A worn or damaged dipstick compromises your ability to monitor oil levels accurately, risking engine damage from inadequate lubrication. The DRAG Specialties Peaked Design Oil Dipstick restores OEM...07100120- SKU:
- 07100120
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
- TYPE:
- SWIVEL
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- OIL DIPSTICK
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$58.25Qty in Cart: 0Quantity:Price:$58.25Subtotal: -
DRAG SPECIALTIES Oil Tank - Black - Softail 74761AB
DRAG SPECIALTIES
$355.05A failing or corroded oil tank compromises your Softail's reliability and aesthetic appeal. This Drag Specialties replacement tank restores OEM-level functionality with a practical side-fill design...07100162- SKU:
- 07100162
- Availability:
- Ships Same Business Day
- Weight:
- 10.60 LBS
- BASE FINISH:
- GLOSS
- PRODUCT NAME:
- OIL TANK
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GLOSS BLACK
- FEATURES:
- INCLUDES OIL FILLER PLUG
- BASE COLOR:
- BLACK
- TYPE:
- SIDE FILL
- UNITS:
- EACH
$355.05Qty in Cart: 0Quantity:Price:$355.05Subtotal: -
DRAG SPECIALTIES Peaked Design Oil Dipstick - Softail 63187E
DRAG SPECIALTIES
$70.97An accurate oil level reading is fundamental to engine health and performance—a worn or damaged dipstick can lead to over-filling, under-filling, or false readings that compromise lubrication. The...07100146- SKU:
- 07100146
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BASE COLOR:
- SILVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- TYPE:
- SWIVEL
- PRODUCT NAME:
- OIL DIPSTICK
- UNITS:
- EACH
$70.97Qty in Cart: 0Quantity:Price:$70.97Subtotal: -
JAMES GASKET Oil Pump Crank Gasket - CSE XL 26256-52
JAMES GASKET
$14.00Oil seepage at the crankshaft can compromise engine reliability and create costly leaks that damage surrounding components. The JAMES GASKET Oil Pump Crank Gasket provides a precision seal engineered...DS174880- SKU:
- DS174880
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- STYLE:
- BODY TO CRANKCASE
$14.00Qty in Cart: 0Quantity:Price:$14.00Subtotal: -
On Sale
COMETIC Complete Gasket Kit - .030" - 4/5 Speed C9847F
COMETIC
MSRP: $356.95Now: $321.26Was: $356.95A complete gasket kit is foundational to engine reliability—one failed gasket can compromise your entire build. The Cometic C9847F delivers the precision sealing you need across all critical engine...09340801- SKU:
- 09340801
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
MSRP: $356.95Now: $321.26Was: $356.95 -
On Sale
COMETIC Complete Gasket Kit - .030" C9848F
COMETIC
MSRP: $356.95Now: $321.26Was: $356.95A complete gasket kit eliminates the guesswork when rebuilding or refreshing your engine—you get every seal you need in one package, eliminating multiple orders and potential fitment issues...09340802- SKU:
- 09340802
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
MSRP: $356.95Now: $321.26Was: $356.95 -
On Sale
COMETIC Head Gasket - .060 - MLS Evo C9180
COMETIC
MSRP: $90.25Now: $81.23Was: $90.25A quality head gasket is fundamental to engine reliability—it's your seal against catastrophic coolant and oil leaks, combustion blow-by, and loss of compression. The COMETIC MLS design distributes...09341227- SKU:
- 09341227
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- BORE SIZE:
- 3,750'
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
MSRP: $90.25Now: $81.23Was: $90.25Qty in Cart: 0Quantity:Price:MSRP: $90.25Now: $81.23Was: $90.25Subtotal: -
On Sale
COMETIC Derby Cover Gasket - 3 Hole C9183F5
COMETIC
Now: $19.17Was: $21.30A quality derby cover gasket is essential for maintaining a reliable seal on your Harley Davidson's engine, preventing oil seepage and protecting internal components from contamination. Cometic's...09341228- SKU:
- 09341228
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CLUTCH COVER
- TYPE:
- DERBY COVER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- 5 PACK
Now: $19.17Was: $21.30 -
On Sale
COMETIC Wet Clutch Seal C9260
COMETIC
Now: $8.55Was: $9.50Wet clutch seals are critical to maintaining hydraulic integrity and preventing fluid loss in your transmission or engine case. A failed or degraded seal compromises performance, increases...09350162- SKU:
- 09350162
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INNER PRIMARY
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
Now: $8.55Was: $9.50 -
On Sale
COMETIC Output Gear Seal C9200F1
COMETIC
MSRP: $11.95Now: $10.76Was: $11.95Transmission output seals are critical to maintaining hydraulic pressure and preventing fluid contamination in your Twin Cam drivetrain. A compromised seal leads to slow leaks, loss of lubrication,...09346322- SKU:
- 09346322
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- TYPE:
- OUTPUT GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $11.95Now: $10.76Was: $11.95 -
On Sale
COMETIC Top End Gasket Kit - M8 C10219
COMETIC
MSRP: $240.40Now: $216.36Was: $240.40A failing top end gasket kit can compromise your engine's reliability and performance, especially under high boost or sustained RPM. The COMETIC EST (Extreme Sealing Technology) gasket kit eliminates...09346324- SKU:
- 09346324
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- BORE SIZE:
- 4,075'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 4.075'
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
MSRP: $240.40Now: $216.36Was: $240.40 -
On Sale
COMETIC Cylinder Base Gasket C9568-1
COMETIC
MSRP: $4.95Now: $4.46Was: $4.95A properly sealed combustion chamber is non-negotiable for engine reliability and power output. The COMETIC Cylinder Base Gasket C9568-1 uses multi-layer steel construction with load control...09344712- SKU:
- 09344712
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,031'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- MATERIAL:
- FIBER
- THICKNESS METRIC:
- 0.79 MM
- UNITS:
- EACH
MSRP: $4.95Now: $4.46Was: $4.95 -
On Sale
COMETIC Rocker Cover Gasket C9602-2
COMETIC
MSRP: $5.95Now: $5.36Was: $5.95A compromised rocker cover gasket leads to oil seepage, visible leaks on your engine bay, and potential contamination of spark plug wells. The COMETIC Rocker Cover Gasket C9602-2 delivers a reliable...09344714- SKU:
- 09344714
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- MATERIAL:
- FIBER
- TYPE:
- ROCKER COVER
- UNITS:
- PAIR
MSRP: $5.95Now: $5.36Was: $5.95Qty in Cart: 0Quantity:Price:MSRP: $5.95Now: $5.36Was: $5.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Rocker Box Stud Set - Big Twin M-4-4538
EASTERN MOTORCYCLE PARTS
MSRP: $47.95Now: $43.63Was: $47.95Rocker box studs are critical fasteners that secure your cylinder head assembly and bear significant stress from combustion pressures and engine vibration. Using OEM-equivalent studs ensures proper...09300027- SKU:
- 09300027
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- STUD SET
- UNITS:
- 8 PACK
- RIDING STYLE:
- STREET
MSRP: $47.95Now: $43.63Was: $47.95 -
On Sale
Jims Valve Spring Kit Evolution Big Twin 1984-2004 1356
JIMS
MSRP: $112.95Now: $101.66Was: $112.95If you're running a high-compression or big-inch Evolution Big Twin, factory valve springs simply won't cut it. The JIMS Valve Spring Kit Evolution is purpose-built to handle the increased pressures...DS199547- SKU:
- DS199547
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PRODUCT NAME:
- SPRING KIT
- SIZE IMPERIAL:
- 0.600' LIFT
- SIZE:
- 0,600' LIFT
- TYPE:
- VALVE
MSRP: $112.95Now: $101.66Was: $112.95Qty in Cart: 0Quantity:Price:MSRP: $112.95Now: $101.66Was: $112.95Subtotal: -
On Sale
Jims Valve Spring Kit Evolution Big Twin 1998-2004 Road Glide 1350K
JIMS
MSRP: $228.91Now: $206.02Was: $228.91If you're running a high-compression Evolution Big Twin with serious displacement, factory valve springs will let you down under sustained boost or aggressive cam profiles. The JIMS Valve Spring Kit...DS199523- SKU:
- DS199523
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- PRODUCT NAME:
- SPRING KIT
- MATERIAL:
- CHROMOLY STEEL
- RIDING STYLE:
- STREET
- SIZE:
- 0,600' LIFT
- SIZE IMPERIAL:
- 0.600' LIFT
- UNITS:
- KIT
- TYPE:
- VALVE
MSRP: $228.91Now: $206.02Was: $228.91Qty in Cart: 0Quantity:Price:MSRP: $228.91Now: $206.02Was: $228.91Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9131
EASTERN MOTORCYCLE PARTS
Now: $14.11Was: $15.50Bearing spacers are critical wear items that directly impact wheel bearing preload and suspension geometry. Worn or damaged spacers compromise handling precision and accelerate bearing degradation,...09200079- SKU:
- 09200079
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
- UNITS:
- 5 PACK
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1135' - 0.1145'
Now: $14.11Was: $15.50 -
On Sale
EASTERN MOTORCYCLE PARTS RING RET.CAM BRNG 99-10 A-11494
EASTERN MOTORCYCLE PARTS
Now: $4.91Was: $5.40A failing camshaft bearing creates catastrophic engine damage—excessive wear, metal debris circulation, and complete powerplant failure. The Eastern Motorcycle Parts Ring Retainer Camshaft Bearing...09250283- SKU:
- 09250283
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- PRODUCT NAME:
- RETAINING RING
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
Now: $4.91Was: $5.40 -
On Sale
EASTERN MOTORCYCLE PARTS Washers - .060" A-35131-36
EASTERN MOTORCYCLE PARTS
Now: $19.57Was: $21.50Precision fastening starts with the right washer. Eastern Motorcycle Parts A-35131-36 washers deliver consistent load distribution and surface protection in applications where tolerances matter...DS195162- SKU:
- DS195162
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- SIZE:
- STANDARD
- TYPE:
- RETAINING
- UNITS:
- 5 PACK
Now: $19.57Was: $21.50
