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 Flywheel - Twin Cam 320-0469
S&S CYCLE
MSRP: $1,794.95Now: $1,615.46Was: $1,794.95If you're building a high-performance Twin Cam engine or pushing stock limits on the track, your factory flywheel is your weakest link. S&S Cycle's 3-piece flywheel assembly delivers the strength and precision you need for reliability under extreme load,...09220159- SKU:
- 09220159
- Availability:
- Ships Same Business Day
- Weight:
- 42.00 LBS
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- EACH
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
MSRP: $1,794.95Now: $1,615.46Was: $1,794.95 -
On Sale
S&S CYCLE Flywheel - Evolution 320-0477
S&S CYCLE
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95Stock flywheels are a weak point in any high-performance Twin Cam build—especially under forced induction or sustained high RPM. The S&S Cycle 3-piece flywheel assembly eliminates this liability with a robust 4140 steel construction and larger 1.671"...09220160- SKU:
- 09220160
- Availability:
- Ships Same Business Day
- Weight:
- 38.60 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- STROKE LENGTH IMPERIAL:
- 4-5/8'
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95 -
On Sale
S&S CYCLE Flywheel - 84" Stroker 32-2222
S&S CYCLE
MSRP: $1,595.95Now: $1,436.36Was: $1,595.95If you're running a 74" or 80" Shovelhead and want more displacement without a complete engine rebuild, the S&S CYCLE 84" Stroker Flywheel Kit delivers the cubic inches you need. This kit upgrades your engine to 84" displacement while reusing your stock...09220161- SKU:
- 09220161
- Availability:
- Ships Same Business Day
- Weight:
- 39.50 LBS
- DISPLACEMENT:
- 84'
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- TYPE:
- STROKER
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
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 Crankpin - Big Twin 34-2105
S&S CYCLE
MSRP: $163.95Now: $147.56Was: $163.95A crankpin is the foundation of your engine's rotating assembly—if it fails, your entire bottom end is compromised. The S&S Cycle Crankpin for Big Twin engines is precision-manufactured to exacting tolerances, ensuring reliable power transfer and...09220162- SKU:
- 09220162
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CRANKPIN ASSEMBLY
- UNITS:
- EACH
MSRP: $163.95Now: $147.56Was: $163.95 -
On Sale
S&S CYCLE Flywheel Assembly 320-0601
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95A quality flywheel assembly is fundamental to engine reliability and performance—especially in high-output Harley-Davidson applications where stock components often become the weak link. The S&S Cycle 320-0601 is engineered with forged steel construction...09220164- SKU:
- 09220164
- Availability:
- Ships Same Business Day
- Weight:
- 42.20 LBS
- FEATURES:
- TAPERED WRIST PIN
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- UNITS:
- EACH
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Flywheel Assembly 320-0603
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95If you're building a high-performance Harley or restoring a stock engine to reliable operation, the S&S Cycle flywheel assembly is engineered to handle both stock and modified applications without compromise. The forged steel construction and tapered...09220166- SKU:
- 09220166
- Availability:
- Ships Same Business Day
- Weight:
- 42.90 LBS
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- UNITS:
- EACH
- FEATURES:
- FULL WRIST PIN
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/2'
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Flywheel Assembly 320-0604
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95A quality flywheel assembly is the foundation of reliable engine performance, whether you're building a stock cruiser or a high-output custom application. The S&S Cycle 320-0604 delivers the precision engineering and durability you need, with a...09220167- SKU:
- 09220167
- Availability:
- Ships Same Business Day
- Weight:
- 42.90 LBS
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- FEATURES:
- FULL WRIST PIN
- STROKE LENGTH IMPERIAL:
- 4-3/8'
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Flywheel Assembly 320-0605
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95A quality flywheel assembly is the foundation of reliable engine performance, especially when building or rebuilding a high-displacement engine. The S&S Cycle 320-0605 combines forged steel durability with precision engineering to handle both stock and...09220168- SKU:
- 09220168
- Availability:
- Ships Same Business Day
- Weight:
- 46.90 LBS
- MATERIAL:
- FORGED STEEL
- PRODUCT NAME:
- FLYWHEEL ASSEMBLY
- FEATURES:
- FULL WRIST PIN
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Replacement Rings 94-2208X
S&S CYCLE
MSRP: $54.95Now: $49.46Was: $54.95Piston rings are critical wear items that directly impact compression, oil control, and overall engine performance. OEM rings often degrade after extended use or high-mileage operation, leading to blow-by, increased oil consumption, and loss of power...09120091- SKU:
- 09120091
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
- TYPE:
- REPLACEMENT
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 3.4375'
- PISTON SIZE IMPERIAL:
- +0.080'
MSRP: $54.95Now: $49.46Was: $54.95 -
On Sale
S&S CYCLE Replacement Rings 94-2209X
S&S CYCLE
MSRP: $54.95Now: $49.46Was: $54.95Maintaining proper ring seal is critical to engine performance and longevity. S&S Cycle replacement rings ensure optimal compression, reduced blow-by, and consistent power delivery across the RPM range. Whether you're rebuilding after high-mileage wear...09120092- SKU:
- 09120092
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
- BORE SIZE IMPERIAL:
- 3.4375'
- PISTON SIZE IMPERIAL:
- +0.090'
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
MSRP: $54.95Now: $49.46Was: $54.95 -
On Sale
S&S CYCLE Replacement Rings 94-1200X
S&S CYCLE
MSRP: $54.95Now: $49.46Was: $54.95When you're building or rebuilding a high-performance engine, piston ring quality directly impacts compression, blow-by control, and overall reliability. S&S Cycle replacement rings are engineered to exacting tolerances, ensuring optimal sealing and...09120093- SKU:
- 09120093
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- REPLACEMENT
- UNITS:
- SET
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.625'
- PISTON SIZE IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON RING
MSRP: $54.95Now: $49.46Was: $54.95 -
On Sale
S&S CYCLE Replacement Rings 94-1201X
S&S CYCLE
MSRP: $54.95Now: $49.46Was: $54.95When you're rebuilding or refreshing your S&S piston assembly, OEM-quality rings are non-negotiable for proper compression, oil control, and ring seal integrity. S&S Cycle replacement rings are precision-engineered to exacting tolerances, ensuring your...09120094- SKU:
- 09120094
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PISTON SIZE IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 3.625'
- PRODUCT NAME:
- PISTON RING
MSRP: $54.95Now: $49.46Was: $54.95 -
On Sale
S&S CYCLE Replacement Rings 94-1213X
S&S CYCLE
MSRP: $64.95Now: $58.46Was: $64.95When you're rebuilding an S&S Cycle engine, using OEM-spec replacement rings ensures proper compression, reduced blow-by, and consistent performance across the entire RPM band. These rings are engineered to exacting tolerances and will restore your...09120098- SKU:
- 09120098
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 3.625'
- PRODUCT NAME:
- PISTON RING
- PISTON SIZE IMPERIAL:
- +0.030'
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
MSRP: $64.95Now: $58.46Was: $64.95 -
On Sale
S&S CYCLE Piston Rings 106-3709A
S&S CYCLE
MSRP: $74.95Now: $67.46Was: $74.95Piston rings are critical wear items that directly impact compression, oil control, and overall engine efficiency. When rings become worn or damaged, you'll experience blow-by, increased oil consumption, and a loss of power output that no amount of...09120640- SKU:
- 09120640
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- REPLACEMENT
- PISTON SIZE IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- BORE SIZE IMPERIAL:
- 3.927'
- RIDING STYLE:
- STREET
- UNITS:
- SET
MSRP: $74.95Now: $67.46Was: $74.95 -
On Sale
S&S CYCLE Piston Rings 940-0014
S&S CYCLE
MSRP: $85.95Now: $77.36Was: $85.95Worn or damaged piston rings directly compromise compression, blowby, and oil control—leading to reduced power output and increased fuel consumption. The S&S Cycle 940-0014 replacement rings restore factory sealing integrity, ensuring your engine...09120641- SKU:
- 09120641
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
- TYPE:
- REPLACEMENT
- PISTON SIZE IMPERIAL:
- STANDARD
- UNITS:
- SET
MSRP: $85.95Now: $77.36Was: $85.95 -
On Sale
S&S CYCLE Piston Rings 940-0013
S&S CYCLE
MSRP: $84.95Now: $76.46Was: $84.95Piston rings are critical wear items that directly impact compression, oil control, and power delivery—worn or damaged rings rob you of performance and increase blow-by. S&S Cycle piston rings are precision-engineered to restore optimal ring sealing,...09120646- SKU:
- 09120646
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- REPLACEMENT
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- BORE SIZE IMPERIAL:
- 4.125'
- RIDING STYLE:
- STREET
- PISTON SIZE IMPERIAL:
- +0.020'
MSRP: $84.95Now: $76.46Was: $84.95 -
On Sale
S&S CYCLE Clips 94-9254
S&S CYCLE
MSRP: $7.95Now: $7.16Was: $7.95Proper piston ring management is critical for maintaining compression integrity and preventing blow-by in high-performance engines. These S&S Cycle clips ensure your forged pistons maintain optimal ring positioning under extreme combustion pressures and...09130244- SKU:
- 09130244
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- PIN
- UNITS:
- 4 PACK
- PRODUCT NAME:
- CIRCLIP
- APPLICATION:
- PISTON
- RIDING STYLE:
- STREET
MSRP: $7.95Now: $7.16Was: $7.95 -
On Sale
S&S CYCLE REED VALVE, 93-99 STD 31-2096
S&S CYCLE
MSRP: $165.95Now: $149.36Was: $165.95High-RPM oil carryover kills engine efficiency and creates maintenance headaches—especially in modified or hard-driven engines with marginal ring seal. The S&S Cycle reed valve solves this problem with pressure-responsive technology that works...09200008- SKU:
- 09200008
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- SILVER
- DIAMETER - THREAD SIZE IMPERIAL:
- STANDARD
- PRODUCT NAME:
- BREATHER VALVE
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- EACH
- BASE COLOR:
- SILVER
MSRP: $165.95Now: $149.36Was: $165.95 -
On Sale
S&S CYCLE REED VALVE, 84-99 +.030 31-2100
S&S CYCLE
MSRP: $171.95Now: $154.76Was: $171.95If you're running a high-rpm engine with marginal piston ring seal, oil carryover into your cam chest is costing you performance and creating maintenance headaches. The S&S Cycle reed valve solves this problem by automatically compensating for air mass...09200009- SKU:
- 09200009
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- BREATHER VALVE
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- EACH
- DIAMETER - THREAD SIZE IMPERIAL:
- +0.030'
- BASE COLOR:
- SILVER
MSRP: $171.95Now: $154.76Was: $171.95 -
On Sale
S&S CYCLE Standard Pistons 92-1210
S&S CYCLE
MSRP: $546.95Now: $492.26Was: $546.95If you're building a 106" stroker engine for your Harley-Davidson Big Twin, these S&S forged pistons are non-negotiable. Engineered specifically for the S&S 106" stroker kit with 4-1/2" stroke flywheels, they deliver the bore-to-stroke ratio your build...09200001- SKU:
- 09200001
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 3.875'
- DISPLACEMENT:
- 106'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- PISTON MATERIAL:
- FORGED ALUMINUM
- PRODUCT NAME:
- PISTON KIT
MSRP: $546.95Now: $492.26Was: $546.95Qty in Cart: 0Quantity:Price:MSRP: $546.95Now: $492.26Was: $546.95Subtotal:
