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 T124 Series Engine 310-0282A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95If you've already invested in performance upgrades for your big twin, the S&S Cycle T124 Series Engine lets you preserve those modifications while stepping up to 124 cubic inches of displacement. This long-block engine eliminates redundant fuel and...09010232- SKU:
- 09010232
- Availability:
- Ships Same Business Day
- Weight:
- 156.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- MODEL:
- T-SERIES
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- WRINKLE BLACK
- STYLE:
- HIGH COMPRESSION
- TYPE:
- LONG BLOCK
- UNITS:
- EACH
- DISPLACEMENT:
- 124'
- COLOR/FINISH:
- CHROME
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4.625'
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95 -
On Sale
S&S CYCLE T111 Long Block Engine - Twin Cam 310-0770A
S&S CYCLE
MSRP: $8,295.95Now: $7,466.36Was: $8,295.95If you've already invested in performance upgrades for your stock engine, the S&S Cycle T111 Long Block lets you preserve those investments while stepping up to genuine big-inch power. This complete engine assembly delivers the displacement and...09010233- SKU:
- 09010233
- Availability:
- Ships Same Business Day
- Weight:
- 152.00 LBS
- MODEL:
- T-SERIES
- STROKE LENGTH IMPERIAL:
- 4.125'
- COMPRESSION RATIO IMPERIAL:
- 9.8:1
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 111'
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- TYPE:
- LONG BLOCK
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 4.125'
- PISTON HEAD SHAPE:
- FLAT TOP
MSRP: $8,295.95Now: $7,466.36Was: $8,295.95 -
On Sale
S&S CYCLE T124 Series Engine 310-0400A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95The S&S Cycle T124 Series Long Block delivers genuine street performance with a 10.8:1 compression ratio and 124 cubic inches of displacement—purpose-built for riders who demand power without compromise. This is a complete engine platform for...09010234- SKU:
- 09010234
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- MODEL:
- T-SERIES
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- WRINKLE BLACK
- STYLE:
- HIGH COMPRESSION
- TYPE:
- LONG BLOCK
- UNITS:
- EACH
- DISPLACEMENT:
- 124'
- PISTON HEAD SHAPE:
- FLAT TOP
- COLOR/FINISH:
- CHROME
- STROKE LENGTH IMPERIAL:
- 4.625'
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95 -
On Sale
S&S CYCLE T124LC Series Long Block Engine 310-0401A
S&S CYCLE
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95The S&S T124LC delivers genuine street-oriented performance without sacrificing reliability across variable fuel quality and riding conditions. At 10.2:1 compression, this long block generates predictable, manageable torque that works exceptionally...09010235- SKU:
- 09010235
- Availability:
- Ships Same Business Day
- Weight:
- 150.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.2:1
- UNITS:
- EACH
- MODEL:
- T-SERIES
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- STYLE:
- LOW COMPRESSION
- TYPE:
- LONG BLOCK
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 124'
- STROKE LENGTH IMPERIAL:
- 4.625'
MSRP: $8,595.95Now: $7,736.36Was: $8,595.95 -
On Sale
S&S CYCLE T143 Long-Block Engine 310-0548A
S&S CYCLE
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95The S&S Cycle T143 is the largest displacement engine S&S manufactures for stock Harley-Davidson touring chassis—delivering nearly double the horsepower of factory powerplants without requiring frame modifications. Built with CNC-machined...09010236- SKU:
- 09010236
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- MODEL:
- T-SERIES
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- TYPE:
- LONG BLOCK
- DISPLACEMENT:
- 143'
- BORE SIZE IMPERIAL:
- 4.425'
- COLOR/FINISH:
- WRINKLE BLACK
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- STROKE LENGTH IMPERIAL:
- 4.625'
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 310-0402A
S&S CYCLE
MSRP: $8,295.95Now: $7,466.36Was: $8,295.95If you're looking to unlock genuine performance gains on your 2007-'16 Harley touring bike without sacrificing reliability, the S&S Cycle T111 Long Block delivers 111 cubic inches of displacement with a forgiving 9.8:1 compression ratio that runs...09010238- SKU:
- 09010238
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.8:1
- STROKE LENGTH IMPERIAL:
- 4.125'
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- MODEL:
- T-SERIES
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 111'
- PISTON HEAD SHAPE:
- FLAT TOP
- 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 T143 Long-Block Engine 310-0737A
S&S CYCLE
MSRP: $10,595.95Now: $9,536.36Was: $10,595.95The S&S Cycle T143 Long-Block Engine delivers 143 cubic inches of displacement in a stock chassis—doubling the horsepower of factory big twins without frame modifications. Built for serious riders and racers who demand maximum performance, this...09010239- SKU:
- 09010239
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- WRINKLE BLACK
- STROKE LENGTH IMPERIAL:
- 4.625'
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 4.425'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 143'
- MODEL:
- T-SERIES
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- TYPE:
- LONG BLOCK
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 Rod Bearing - Big Twin 41-99 34-4010
S&S CYCLE
MSRP: $105.95Now: $95.36Was: $105.95Engine reliability hinges on quality bearings—a worn rod bearing compromises compression, increases friction, and accelerates wear on your crankshaft. The S&S CYCLE Rod Bearing delivers OE-grade precision for Big Twin engines, restoring proper clearances...09240390- SKU:
- 09240390
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROLLER
- UNITS:
- KIT
- APPLICATION:
- CONNECTING ROD
- PRODUCT NAME:
- BEARING
MSRP: $105.95Now: $95.36Was: $105.95 -
On Sale
S&S CYCLE Right Side Inner Main Bearing Race - Twin Cam 99-17 340-0077
S&S CYCLE
MSRP: $65.95Now: $59.36Was: $65.95The right side inner main bearing race is a critical component in your Twin Cam's bottom end, and S&S Cycle's precision-manufactured replacement ensures proper load distribution and extended engine life. OEM races wear over time, compromising bearing...09240391- SKU:
- 09240391
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- RACE
- UNITS:
- EACH
MSRP: $65.95Now: $59.36Was: $65.95 -
On Sale
S&S CYCLE Flywheel - Stroker - Twin Cam 320-0355
S&S CYCLE
MSRP: $1,794.95Now: $1,615.46Was: $1,794.95If you're building a high-displacement stroker engine, your stock flywheel won't cut it. The S&S CYCLE Stroker Flywheel is engineered to handle the increased loads of a larger crankpin and higher compression, giving you the strength and reliability...09220143- SKU:
- 09220143
- Availability:
- Ships Same Business Day
- Weight:
- 39.30 LBS
- FEATURES:
- WITHOUT SPROCKET BEARING RACE
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- MATERIAL:
- STEEL
- UNITS:
- EACH
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- ENGINE TYPE:
- 'B' MOTOR
- RIDING STYLE:
- STREET
MSRP: $1,794.95Now: $1,615.46Was: $1,794.95 -
On Sale
S&S CYCLE Flywheel Assembly 32-2145
S&S CYCLE
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95A quality flywheel assembly is the foundation of reliable engine performance—it balances rotating forces, enables smooth power delivery, and directly impacts how your engine responds under load. The S&S CYCLE 32-2145 combines forged steel durability with...09220146- SKU:
- 09220146
- Availability:
- Ships Same Business Day
- Weight:
- 39.90 LBS
- UNITS:
- EACH
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/4'
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95 -
On Sale
S&S CYCLE Flywheel Assembly - Big Twin 32-2230
S&S CYCLE
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95A quality flywheel assembly is the foundation of reliable engine performance, especially when you're pushing your Big Twin beyond stock parameters. The S&S Cycle 32-2230 delivers the precision engineering and durability that separates dependable builds...09220147- SKU:
- 09220147
- Availability:
- Ships Same Business Day
- Weight:
- 37.26 LBS
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- RIDING STYLE:
- STREET
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95Qty in Cart: 0Quantity:Price:MSRP: $1,595.95Now: $1,436.36Was: $1,595.95Subtotal: -
On Sale
S&S CYCLE Flywheel - 4-1/4" - Big Twin 32-2235
S&S CYCLE
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95If you're building a high-displacement Big Twin engine or overhauling an existing S&S powerplant, the flywheel is your foundation for reliability and performance. This is the same assembly trusted in S&S SH80 Alternator engines—proven in demanding...09220148- SKU:
- 09220148
- Availability:
- Ships Same Business Day
- Weight:
- 36.89 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- UNITS:
- EACH
- MATERIAL:
- FORGED STEEL
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/4'
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95 -
On Sale
S&S CYCLE Stroker Kit - 4-1/2" - Twin Cam 320-0459
S&S CYCLE
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95If you're serious about extracting maximum displacement from your Twin Cam engine, the S&S Cycle Stroker Kit delivers a proven path to 4-1/2" stroke performance without requiring case modifications. This U.S.-manufactured solution gives you genuine cubic...09220149- SKU:
- 09220149
- Availability:
- Ships Same Business Day
- Weight:
- 39.49 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- UNITS:
- EACH
- FEATURES:
- WITH SPROCKET BEARING RACE
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- DISPLACEMENT:
- 106'
- RIDING STYLE:
- STREET
- TYPE:
- STROKER
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95 -
On Sale
S&S CYCLE Flywheel - Twin Cam 320-0464
S&S CYCLE
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95If you're pushing your Twin Cam to higher RPMs or building for sustained high-load racing, stock flywheels become a liability. The S&S Cycle 3-piece flywheel eliminates that weak point with forged 4140 steel construction and a larger 1.671" crankpin that...09220150- SKU:
- 09220150
- Availability:
- Ships Same Business Day
- Weight:
- 39.24 LBS
- ENGINE TYPE:
- S&S MOTOR
- MATERIAL:
- STEEL
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- UNITS:
- EACH
- FEATURES:
- WITHOUT SPROCKET BEARING RACE
- RIDING STYLE:
- STREET
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95 -
On Sale
S&S CYCLE Flywheel - Twin Cam 320-0475
S&S CYCLE
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95If you're running a high-output Twin Cam engine, your stock flywheel is a limiting factor. The S&S Cycle 3-piece flywheel strengthens your rotating assembly with 4140 steel construction and a larger 1.671" crankpin, delivering the durability and...09220151- SKU:
- 09220151
- Availability:
- Ships Same Business Day
- Weight:
- 39.04 LBS
- ENGINE TYPE:
- S&S MOTOR
- FEATURES:
- WITHOUT SPROCKET BEARING RACE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95 -
On Sale
S&S CYCLE Flywheel - 4-5/8" - SE120R 320-0523
S&S CYCLE
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95If you're running a high-output engine or pushing your S&S motor to its limits, a stock flywheel becomes your weak point. The S&S CYCLE 3-piece flywheel handles serious horsepower and sustained load cycles without failure, giving you the durability and...09220152- SKU:
- 09220152
- Availability:
- Ships Same Business Day
- Weight:
- 39.30 LBS
- FEATURES:
- WITHOUT SPROCKET BEARING RACE
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- ENGINE TYPE:
- SE 120R
- MATERIAL:
- STEEL
- STROKE LENGTH IMPERIAL:
- 4-5/8'
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95 -
On Sale
S&S CYCLE Flywheel - Twin Cam 320-0350
S&S CYCLE
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95If you're building a high-performance Twin Cam engine that demands reliability under sustained boost or high RPM loads, you need a flywheel assembly engineered to handle the stress. S&S Cycle's 3-piece design with integral main shafts delivers the...09220156- SKU:
- 09220156
- Availability:
- Ships Same Business Day
- Weight:
- 39.50 LBS
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- UNITS:
- EACH
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95 -
On Sale
S&S CYCLE Flywheel - Twin Cam 320-0354
S&S CYCLE
MSRP: $1,794.95Now: $1,615.46Was: $1,794.95If you're running a Twin Cam motor at higher RPMs or building a performance engine, stock flywheels become a liability—they're prone to failure under sustained load. The S&S Cycle 3-piece flywheel assembly eliminates that risk with a robust design...09220157- SKU:
- 09220157
- Availability:
- Ships Same Business Day
- Weight:
- 41.00 LBS
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- UNITS:
- EACH
MSRP: $1,794.95Now: $1,615.46Was: $1,794.95 -
On Sale
S&S CYCLE Flywheel - Twin Cam 320-0360
S&S CYCLE
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95If you're running a Twin Cam motor at serious power levels, your factory flywheel is a liability. The S&S Cycle 3-piece flywheel assembly eliminates that weak link with forged 4140 steel construction and a larger 1.671" crankpin that handles aggressive...09220158- SKU:
- 09220158
- Availability:
- Ships Same Business Day
- Weight:
- 39.10 LBS
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- UNITS:
- EACH
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
MSRP: $1,695.95Now: $1,526.36Was: $1,695.95
