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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On Sale
S&S CYCLE Gasket Kit - 4-1/8" 106-0964
S&S CYCLE
MSRP: $225.95Now: $203.36Was: $225.95A quality gasket kit is the foundation of a reliable engine assembly—it seals critical surfaces and prevents oil leakage that can compromise performance and longevity. The S&S Cycle 4-1/8" gasket kit...09345026- SKU:
- 09345026
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- TYPE:
- COMPLETE
- UNITS:
- KIT
- FEATURES:
- FOR '84 - '99 EVOLUTION-STYLE BIG TWIN
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
MSRP: $225.95Now: $203.36Was: $225.95 -
On Sale
S&S CYCLE Cam with Plate - 509 Series 310-0810
S&S CYCLE
MSRP: $2,029.95Now: $1,826.96Was: $2,029.95Stock cam timing and chain tensioners are compromise designs built for durability across millions of vehicles—not performance. The S&S 509 Series delivers higher valve lift and optimized timing while...09251098- SKU:
- 09251098
- Availability:
- Ships Same Business Day
- Weight:
- 12.85 LBS
- GRIND:
- 509 SERIES
- INTAKE CLOSE IMPERIAL:
- 18°
- INTAKE LIFT IMPERIAL:
- 0.509'
- TYPE:
- GEAR
- APPLICATION:
- INTAKE
- EXHAUST LIFT IMPERIAL:
- 0.509'
- EXHAUST OPEN IMPERIAL:
- 46°
- INTAKE OPEN IMPERIAL:
- 18°
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- EXHAUST CLOSE IMPERIAL:
- 11°
- MODEL:
- STANDARD
- PRODUCT NAME:
- CAMSHAFT
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 237°
- INTAKE DURATION IMPERIAL:
- 216°
MSRP: $2,029.95Now: $1,826.96Was: $2,029.95 -
On Sale
S&S CYCLE Cam - 465C - M8 310-1003B
S&S CYCLE
MSRP: $1,721.95Now: $1,549.76Was: $1,721.95The S&S Cycle 465C cam delivers the low-end torque and reliability that touring riders demand, without sacrificing durability at sustained RPMs. Built from billet aluminum with precision engineering,...09251355- SKU:
- 09251355
- Availability:
- Ships Same Business Day
- Weight:
- 11.15 LBS
- COLOR/FINISH:
- CHROME
- FEATURES:
- OIL COOLED
- PRODUCT NAME:
- CAMCHEST KIT
- TYPE:
- CHAIN
- GRIND:
- 465C
- RIDING STYLE:
- STREET
- UNITS:
- KIT
MSRP: $1,721.95Now: $1,549.76Was: $1,721.95Qty in Cart: 0Quantity:Price:MSRP: $1,721.95Now: $1,549.76Was: $1,721.95Subtotal: -
On Sale
S&S CYCLE Chain Drive Cam - 570C - Twin Cam 106-4381
S&S CYCLE
MSRP: $399.95Now: $359.96Was: $399.95If you're running a Twin Cam engine and serious about consistent power delivery, timing chain lash is costing you performance. The S&S Cycle 570C Chain Drive Cam eliminates the slop and deflection of...09250348- SKU:
- 09250348
- Availability:
- Ships Same Business Day
- Weight:
- 4.05 LBS
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 255°
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 107.5°
- EXHAUST OPEN IMPERIAL:
- 55°
- GRIND:
- 570 SERIES
- INTAKE LIFT AT TDC IMPERIAL:
- 0.187'
- INTAKE OPEN IMPERIAL:
- 20°
- APPLICATION:
- EXHAUST
- EXHAUST LIFT IMPERIAL:
- 0.570'
- INTAKE LIFT IMPERIAL:
- 0.570'
- TYPE:
- CHAIN
- UNITS:
- KIT
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.179'
- INTAKE DURATION IMPERIAL:
- 240°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 100°
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
MSRP: $399.95Now: $359.96Was: $399.95 -
On Sale
S&S CYCLE Oil Pump with Cam Plate - M8 Oil Cooled 310-0998B
S&S CYCLE
MSRP: $836.95Now: $753.26Was: $836.95Engine oil management directly impacts lubrication efficiency, bearing longevity, and overall reliability—especially in high-performance and modified M8 applications. The S&S Cycle oil pump with cam...09320251- SKU:
- 09320251
- Availability:
- Ships Same Business Day
- Weight:
- 5.80 LBS
- COLOR/FINISH:
- BLUE
- UNITS:
- KIT
- BASE COLOR:
- BLUE
- PRODUCT NAME:
- PUMP KIT
- RIDING STYLE:
- STREET
- TYPE:
- CAM SUPPORT
- TYPE:
- OIL
MSRP: $836.95Now: $753.26Was: $836.95Qty in Cart: 0Quantity:Price:MSRP: $836.95Now: $753.26Was: $836.95Subtotal: -
On Sale
S&S CYCLE Crankpin - Big Twin 34-2003
S&S CYCLE
MSRP: $163.95Now: $147.56Was: $163.95A worn or damaged crankpin directly compromises engine reliability and performance in your Big Twin—this OEM-specification replacement restores proper crank geometry and eliminates excess bearing...09210159- SKU:
- 09210159
- Availability:
- Ships Same Business Day
- Weight:
- 1.43 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CRANKPIN ASSEMBLY
- TYPE:
- STANDARD
MSRP: $163.95Now: $147.56Was: $163.95 -
On Sale
S&S CYCLE Replacement Pistons with Rings 92-2027
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95Upgrading to S&S Cycle replacement pistons is essential when maximizing the performance potential of your S&S cylinder heads. These 10:1 compression pistons are engineered to handle the increased...09100007- SKU:
- 09100007
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE - OVERSIZE:
- +0,010'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
MSRP: $484.95Now: $436.46Was: $484.95 -
On Sale
S&S CYCLE Replacement Pistons with Rings 92-2028
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95If you're building a high-performance S&S engine, your pistons are the foundation of reliable power delivery and longevity under sustained load. These S&S replacement pistons deliver the compression...09100008- SKU:
- 09100008
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- BORE - OVERSIZE:
- +0,020'
- BORE SIZE IMPERIAL:
- 3.500'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
MSRP: $484.95Now: $436.46Was: $484.95 -
On Sale
S&S CYCLE Piston Kit 92-2016
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95If you're running an 883cc or 1200cc Big Twin and want a straightforward displacement bump without extensive engine work, the S&S CYCLE Piston Kit 92-2016 delivers a 1250cc conversion at a reasonable...09100009- SKU:
- 09100009
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.2:1
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- TYPE:
- HIGH COMPRESSION
MSRP: $484.95Now: $436.46Was: $484.95 -
On Sale
S&S CYCLE Piston Kit 92-2017
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95Looking to unlock genuine displacement gains from your Big Twin? The S&S Cycle 1250cc Piston Kit delivers a straightforward path to increased cubic inches, higher compression, and measurable power...09100011- SKU:
- 09100011
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- TYPE:
- HIGH COMPRESSION
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,010'
- COMPRESSION RATIO IMPERIAL:
- 12.2:1
MSRP: $484.95Now: $436.46Was: $484.95Qty in Cart: 0Quantity:Price:MSRP: $484.95Now: $436.46Was: $484.95Subtotal: -
On Sale
S&S CYCLE T124HC Series Engine 310-0900A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95The S&S Cycle T124HC Series engine delivers genuine big-displacement performance for Dyna models, combining a 10.8:1 compression ratio with purpose-built internals engineered for sustained...09010241- SKU:
- 09010241
- Availability:
- Ships Same Business Day
- Weight:
- 156.00 LBS
- DISPLACEMENT:
- 124'
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- MODEL:
- T-SERIES
- STROKE LENGTH IMPERIAL:
- 4.625'
- UNITS:
- EACH
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- STYLE:
- HIGH COMPRESSION
- TYPE:
- LONG BLOCK
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95 -
On Sale
S&S CYCLE T111 Long-Block Engine 310-0830A
S&S CYCLE
MSRP: $8,295.95Now: $7,466.36Was: $8,295.95Upgrading from a stock engine means choosing between a tired rebuild or a purpose-built replacement—the S&S Cycle T111 Long-Block delivers measurable gains in horsepower and torque without requiring...09010242- SKU:
- 09010242
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 111'
- STROKE LENGTH IMPERIAL:
- 4.125'
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 9.8:1
- PISTON HEAD SHAPE:
- FLAT TOP
- MODEL:
- T-SERIES
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- TYPE:
- LONG BLOCK
MSRP: $8,295.95Now: $7,466.36Was: $8,295.95Qty in Cart: 0Quantity:Price:MSRP: $8,295.95Now: $7,466.36Was: $8,295.95Subtotal: -
On Sale
S&S CYCLE T124 Series Engine 310-0831A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95The S&S Cycle T124 Series engine delivers the displacement and compression ratio your build needs to compete on the street. Rather than nursing a tired stock engine along, this all-new long block...09010243- SKU:
- 09010243
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- DISPLACEMENT:
- 124'
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- MODEL:
- T-SERIES
- STROKE LENGTH IMPERIAL:
- 4.625'
- UNITS:
- EACH
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- STYLE:
- HIGH COMPRESSION
- TYPE:
- LONG BLOCK
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95 -
On Sale
S&S CYCLE T124LC Series Long Block Engine 310-0832A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95The S&S Cycle T124LC Series Long Block Engine delivers the low-end torque and reliability you need for street performance without sacrificing everyday rideability. At 10.2:1 compression, this...09010244- SKU:
- 09010244
- Availability:
- Ships Same Business Day
- Weight:
- 156.00 LBS
- STYLE:
- LOW COMPRESSION
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 10.2:1
- STROKE LENGTH IMPERIAL:
- 4.625'
- UNITS:
- EACH
- DISPLACEMENT:
- 124'
- MODEL:
- T-SERIES
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- TYPE:
- LONG BLOCK
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95Qty in Cart: 0Quantity:Price:MSRP: $8,595.95Now: $7,736.36Was: $8,595.95Subtotal: -
On Sale
S&S CYCLE T143 Long-Block Engine 310-0833A
S&S CYCLE
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95The S&S Cycle T143 is purpose-built for riders who demand maximum performance without sacrificing chassis compatibility. At double the horsepower of a stock motor, this ultra-performance long-block...09010245- SKU:
- 09010245
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE SIZE IMPERIAL:
- 4.425'
- COLOR/FINISH:
- BLACK
- STROKE LENGTH IMPERIAL:
- 4.625'
- TYPE:
- LONG BLOCK
- UNITS:
- EACH
- DISPLACEMENT:
- 143'
- MODEL:
- T-SERIES
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95Qty in Cart: 0Quantity:Price:MSRP: $10,595.95Now: $9,536.36Was: $10,595.95Subtotal: -
On Sale
S&S CYCLE T111 Long Block Engine 310-0834A
S&S CYCLE
MSRP: $8,295.95Now: $7,466.36Was: $8,295.95The S&S Cycle T111 long block delivers significantly more horsepower and torque than aging stock engines while maintaining compatibility with your existing fuel system and ignition—no expensive...09010246- SKU:
- 09010246
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- COLOR/FINISH:
- BLACK
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE SIZE IMPERIAL:
- 4.125'
- DISPLACEMENT:
- 111'
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- TYPE:
- LONG BLOCK
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 9.8:1
- MODEL:
- T-SERIES
- STROKE LENGTH IMPERIAL:
- 4.125'
MSRP: $8,295.95Now: $7,466.36Was: $8,295.95Qty in Cart: 0Quantity:Price:MSRP: $8,295.95Now: $7,466.36Was: $8,295.95Subtotal: -
On Sale
S&S CYCLE T124 Series Engine 310-0835A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95If you're running an aging stock engine in your Harley-Davidson, you're leaving serious power on the table. The S&S Cycle T124 Series delivers 124 cubic inches of displacement with a 10.8:1...09010247- SKU:
- 09010247
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 124'
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4.625'
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- STYLE:
- HIGH COMPRESSION
- TYPE:
- LONG BLOCK
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- MODEL:
- T-SERIES
- UNITS:
- EACH
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95Qty in Cart: 0Quantity:Price:MSRP: $8,595.95Now: $7,736.36Was: $8,595.95Subtotal: -
On Sale
S&S CYCLE T124LC Series Long Block Engine 310-0836A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95Replace that worn stock engine with a purpose-built long block that delivers substantial low-end torque and reliable street performance. The S&S T124LC's 10.2:1 compression ratio prioritizes...09010248- SKU:
- 09010248
- Availability:
- Ships Same Business Day
- Weight:
- 156.00 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 124'
- STROKE LENGTH IMPERIAL:
- 4.625'
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- STYLE:
- LOW COMPRESSION
- TYPE:
- LONG BLOCK
- MODEL:
- T-SERIES
- COMPRESSION RATIO IMPERIAL:
- 10.2:1
- UNITS:
- EACH
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95Qty in Cart: 0Quantity:Price:MSRP: $8,595.95Now: $7,736.36Was: $8,595.95Subtotal: -
On Sale
S&S CYCLE T143 Long-Block Engine 310-0883A
S&S CYCLE
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95The S&S CYCLE T143 Long-Block Engine delivers serious displacement and proven performance in a package engineered specifically for 2006-2017 Harley-Davidson Dyna models—no frame modification required...09010249- SKU:
- 09010249
- Availability:
- Ships Same Business Day
- Weight:
- 160.00 LBS
- BORE SIZE IMPERIAL:
- 4.425'
- COLOR/FINISH:
- WRINKLE BLACK
- STROKE LENGTH IMPERIAL:
- 4.625'
- TYPE:
- LONG BLOCK
- DISPLACEMENT:
- 143'
- MODEL:
- T-SERIES
- COLOR/FINISH:
- CHROME
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95Qty in Cart: 0Quantity:Price:MSRP: $10,595.95Now: $9,536.36Was: $10,595.95Subtotal: -
On Sale
S&S CYCLE T143 Long-Block Engine 310-0901A
S&S CYCLE
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95The S&S Cycle T143 is a complete long-block engine designed to unlock genuine performance gains in your 2006–2017 Harley-Davidson Dyna without compromising reliability or requiring frame...09010250- SKU:
- 09010250
- Availability:
- Ships Same Business Day
- Weight:
- 160.00 LBS
- BORE SIZE IMPERIAL:
- 4.425'
- COLOR/FINISH:
- BLACK
- STROKE LENGTH IMPERIAL:
- 4.625'
- TYPE:
- LONG BLOCK
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 143'
- MODEL:
- T-SERIES
- UNITS:
- EACH
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95Qty in Cart: 0Quantity:Price:MSRP: $10,595.95Now: $9,536.36Was: $10,595.95Subtotal:
