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
-
On Sale
S&S CYCLE Replacement Rings 94-1290X
S&S CYCLE
MSRP: $63.95Now: $57.56Was: $63.95When you're running S&S pistons at the edge of performance, your ring set is critical to maintaining compression, controlling blow-by, and extending engine life. OEM rings can't match the precision...DS751310- SKU:
- DS751310
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PISTON SIZE IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- TYPE:
- REPLACEMENT
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- UNITS:
- SET
MSRP: $63.95Now: $57.56Was: $63.95 -
On Sale
S&S CYCLE Base Gaskets - 3-5/8" - Shovelhead 930-0096
S&S CYCLE
MSRP: $19.95Now: $17.96Was: $19.95Base gaskets are critical to engine sealing integrity, and failure here means catastrophic oil loss and potential engine damage. S&S Cycle's Pro-Formance micropore compound delivers proven resistance...09345024- SKU:
- 09345024
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,018'
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.625'
- FEATURES:
- STOCK BOLT PATTERN
- THICKNESS:
- 0,46 MM (0,018')
- THICKNESS METRIC:
- 0.46 MM
MSRP: $19.95Now: $17.96Was: $19.95 -
On Sale
S&S CYCLE Gaskets - 3.94" - Twin Cam 900-0862
S&S CYCLE
MSRP: $91.95Now: $82.76Was: $91.95A head gasket failure can sideline your engine and drain your wallet. S&S Cycle's 3.94" gaskets are engineered with aramid fiber-reinforced graphite and a stainless steel fire ring to withstand the...09345025- SKU:
- 09345025
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.940'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.09 MM
- BORE SIZE:
- 3,940'
- THICKNESS IMPERIAL:
- 0,043'
- MATERIAL:
- STEEL
- THICKNESS:
- 1,09 MM (0,043')
MSRP: $91.95Now: $82.76Was: $91.95 -
On Sale
S&S CYCLE Rocker Box Top Gasket 90-4079
S&S CYCLE
MSRP: $19.95Now: $17.96Was: $19.95Rocker box gaskets are critical sealing components that prevent oil seepage and maintain proper engine pressurization in your big twin. A worn or degraded gasket compromises engine integrity and...09345032- SKU:
- 09345032
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
MSRP: $19.95Now: $17.96Was: $19.95 -
On Sale
S&S CYCLE Tapped Guide Gaskets 33-5302
S&S CYCLE
MSRP: $10.95Now: $9.86Was: $10.95Proper crankcase sealing is critical for maintaining oil pressure, preventing leaks, and ensuring consistent engine performance in high-revving applications. S&S Cycle's Tapped Guide Gaskets are...09345076- SKU:
- 09345076
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- PAIR
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- TAPPET GUIDE
MSRP: $10.95Now: $9.86Was: $10.95 -
On Sale
S&S CYCLE Rocker Box Gasket - Big Twin 90-4073
S&S CYCLE
MSRP: $61.95Now: $55.76Was: $61.95Rocker box gaskets are a critical wear item that directly impact oil containment and engine reliability on Big Twin platforms. Deteriorating or leaking gaskets compromise engine sealing, increase oil...DS174081- SKU:
- DS174081
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- ROCKER BOX
- UNITS:
- KIT
- FEATURES:
- FOR '99 - '06 BIG TWIN CAM S&S ROCKER BOXES
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- 6-BOLT STYLE
- RIDING STYLE:
- STREET
MSRP: $61.95Now: $55.76Was: $61.95 -
On Sale
S&S CYCLE Complete Gasket Kit - 4" 106-1020
S&S CYCLE
MSRP: $224.95Now: $202.46Was: $224.95Engine gasket sets are critical to maintaining compression, preventing fluid leaks, and ensuring reliable performance during extended track sessions or spirited driving. The S&S Cycle Complete Gasket...09344759- SKU:
- 09344759
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- FEATURES:
- FOR '84 - '99 EVOLUTION-STYLE BIG TWIN
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- TYPE:
- COMPLETE
MSRP: $224.95Now: $202.46Was: $224.95 -
On Sale
S&S CYCLE Cylinder and Piston Kit 910-0203
S&S CYCLE
MSRP: $1,282.95Now: $1,154.66Was: $1,282.95Push your engine beyond factory limits with the S&S Cycle 910-0203 Cylinder and Piston Kit. This purpose-built upgrade transforms stock displacement into serious horsepower, delivering the bore and...09310430- SKU:
- 09310430
- Availability:
- Ships Same Business Day
- Weight:
- 26.35 LBS
- COLOR/FINISH:
- POWDER-COATED
- BORE SIZE IMPERIAL:
- 3.875'
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 106'
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
- COLOR/FINISH:
- WRINKLE BLACK
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,282.95Now: $1,154.66Was: $1,282.95 -
On Sale
S&S CYCLE Cylinder Kit 910-0200
S&S CYCLE
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95The S&S CYCLE 910-0200 Big Bore kit delivers measurable displacement gains without the expense and downtime of case splitting. Swap in premium cylinders and pistons to unlock genuine performance...09310433- SKU:
- 09310433
- Availability:
- Ships Same Business Day
- Weight:
- 26.63 LBS
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- STYLE:
- BIG BORE
- BORE SIZE IMPERIAL:
- 3.875'
- COLOR/FINISH:
- SILVER
- DISPLACEMENT:
- 95'
- MATERIAL:
- ALUMINUM
MSRP: $1,287.95Now: $1,159.16Was: $1,287.95 -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0500
S&S CYCLE
MSRP: $1,345.95Now: $1,211.36Was: $1,345.95If you're running a Twin Cam engine at stock displacement, you're leaving serious power on the table. The S&S Cycle Big Bore cylinder kit delivers a straightforward path to increased displacement and...09310534- SKU:
- 09310534
- Availability:
- Ships Same Business Day
- Weight:
- 25.71 LBS
- DISPLACEMENT:
- 107'
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- COMPRESSION RATIO IMPERIAL:
- 9.9:1
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
MSRP: $1,345.95Now: $1,211.36Was: $1,345.95 -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0482
S&S CYCLE
MSRP: $1,358.95Now: $1,223.06Was: $1,358.95If you're looking to unlock genuine horsepower gains on your Twin Cam engine without major case work, the S&S Cycle Big Bore Cylinder Kit delivers straightforward displacement increase with minimal...09310537- SKU:
- 09310537
- Availability:
- Ships Same Business Day
- Weight:
- 25.60 LBS
- DISPLACEMENT:
- 98'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 9.8:1
- COLOR/FINISH:
- SILVER
- MATERIAL:
- ALUMINUM
MSRP: $1,358.95Now: $1,223.06Was: $1,358.95 -
On Sale
S&S CYCLE G Manifold to Carburetor O-Ring 50-8093
S&S CYCLE
MSRP: $15.95Now: $14.36Was: $15.95A proper seal between your S&S Cycle manifold and carburetor is critical to maintaining consistent air-fuel mixture and preventing vacuum leaks that compromise performance. This OEM-spec O-ring...DS289934- SKU:
- DS289934
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- INTAKE MANIFOLD TO CARBURETOR
MSRP: $15.95Now: $14.36Was: $15.95 -
On Sale
S&S CYCLE Cylinder Kit - Twin Cam 910-0338
S&S CYCLE
MSRP: $1,643.95Now: $1,479.56Was: $1,643.95If you're running stock cylinder heads and looking to unlock genuine displacement gains without case splitting, the S&S Cycle Big Bore kit delivers measurable power increases with straightforward...09310541- SKU:
- 09310541
- Availability:
- Ships Same Business Day
- Weight:
- 24.59 LBS
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 11.4:1
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 124'
MSRP: $1,643.95Now: $1,479.56Was: $1,643.95 -
On Sale
S&S CYCLE Cylinder Kit 910-0689
S&S CYCLE
MSRP: $1,008.95Now: $908.06Was: $1,008.95If you're serious about extracting maximum displacement and compression from your Harley-Davidson engine, the S&S Cycle 1250cc Cylinder Kit is the foundation every builder reaches for. These forged...09310527- SKU:
- 09310527
- Availability:
- Ships Same Business Day
- Weight:
- 22.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- MATERIAL:
- IRON
- MATERIAL:
- ALUMINUM
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- TYPE:
- FLAT TOP
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.562'
- DISPLACEMENT:
- 1250 CC
- MATERIAL:
- CAST
- RIDING STYLE:
- STREET
MSRP: $1,008.95Now: $908.06Was: $1,008.95 -
On Sale
S&S CYCLE Cylinder Kit 910-0692
S&S CYCLE
MSRP: $1,008.95Now: $908.06Was: $1,008.95Looking to unlock serious displacement gains on your Harley-Davidson? The S&S Cycle 1250cc Cylinder Kit delivers a straightforward path to increased horsepower and torque without compromise. This...09310528- SKU:
- 09310528
- Availability:
- Ships Same Business Day
- Weight:
- 22.96 LBS
- TYPE:
- DOMED
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- BORE SIZE IMPERIAL:
- 3.562'
- DISPLACEMENT:
- 1250 CC
- MATERIAL:
- CAST
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 11.2:1
- MATERIAL:
- IRON
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,008.95Now: $908.06Was: $1,008.95 -
On Sale
S&S CYCLE Quickee Pushrods - Black - Twin Cam 930-0143
S&S CYCLE
MSRP: $336.95Now: $303.26Was: $336.95If you're running Evolution or Twin Cam hydraulic tappets, these S&S Cycle Quickee Pushrods eliminate the frustration of rocker cover removal during installation and adjustment. The threaded adjuster...09280097- SKU:
- 09280097
- Availability:
- Ships Same Business Day
- Weight:
- 1.61 LBS
- BASE COLOR:
- BLACK
- MATERIAL:
- CHROMOLY STEEL
- MODEL:
- QUICKEE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GLOSS BLACK
- BASE FINISH:
- GLOSS
- PRODUCT NAME:
- PUSHROD SET
- STYLE:
- ADJUSTABLE
- UNITS:
- SET OF 4
MSRP: $336.95Now: $303.26Was: $336.95 -
On Sale
S&S CYCLE Pushrod Cover Keeper Set - Black - M8 930-0138
S&S CYCLE
MSRP: $40.95Now: $36.86Was: $40.95Stock pushrod covers can limit your custom engine build options, especially when you're working with non-standard configurations or tight clearances. The S&S Cycle Pushrod Cover Keeper Set ensures...09280098- SKU:
- 09280098
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- LENGTH IMPERIAL:
- 2.220'
- RIDING STYLE:
- STREET
- UNITS:
- SET
- COLOR/FINISH:
- GLOSS BLACK
- LENGTH:
- 2,200'
- MATERIAL:
- STEEL
- TYPE:
- PUSHROD COVER
- PRODUCT NAME:
- KEEPER
MSRP: $40.95Now: $36.86Was: $40.95 -
On Sale
S&S CYCLE Steel Breather Gear 33-4250
S&S CYCLE
MSRP: $169.95Now: $152.96Was: $169.95A properly functioning breather system is critical to engine longevity and consistent performance. The S&S Cycle Steel Breather Gear ensures reliable oil management and reduced crankcase pressure,...DS194242- SKU:
- DS194242
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
- TYPE:
- BREATHER
- FEATURES:
- STANDARD
- UNITS:
- KIT
MSRP: $169.95Now: $152.96Was: $169.95 -
On Sale
S&S CYCLE Steel Breather Gear 33-4253
S&S CYCLE
MSRP: $167.95Now: $151.16Was: $167.95A properly functioning breather system is critical for maintaining consistent crankcase pressure and preventing oil blow-by in high-performance engines. The S&S CYCLE Steel Breather Gear delivers...DS194243- SKU:
- DS194243
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- TYPE:
- BREATHER
- FEATURES:
- STANDARD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GEAR KIT
- UNITS:
- KIT
MSRP: $167.95Now: $151.16Was: $167.95 -
On Sale
S&S CYCLE Pushrods with Tubes - M8 930-0123
S&S CYCLE
MSRP: $314.95Now: $283.46Was: $314.95Pushrods are a critical valve train component that directly impacts engine reliability and performance consistency. S&S Cycle's chromoly steel construction provides superior strength compared to...09280088- SKU:
- 09280088
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
- COLOR/FINISH:
- CHROME
- BASE FINISH:
- CHROME
- MATERIAL:
- CHROMOLY STEEL
- RIDING STYLE:
- STREET
- BASE COLOR:
- SILVER
- MODEL:
- QUICKEE
- STYLE:
- QUICKEE
- PRODUCT NAME:
- PUSHROD KIT
- UNITS:
- KIT
MSRP: $314.95Now: $283.46Was: $314.95Qty in Cart: 0Quantity:Price:MSRP: $314.95Now: $283.46Was: $314.95Subtotal:
