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 Piston Kit 106-5554
S&S CYCLE
MSRP: $484.95Now: $446.15Was: $484.95If you're running an 883cc or 1200cc Big Twin and want measurable gains in displacement and power without a complete engine rebuild, the S&S CYCLE Piston Kit 106-5554 delivers a straightforward path...09101936- SKU:
- 09101936
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.25:1
- DISPLACEMENT:
- 89'
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.500'
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- TYPE:
- REPLACEMENT
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- FLAT TOP
MSRP: $484.95Now: $446.15Was: $484.95 -
On Sale
S&S CYCLE Piston Kit 106-5555
S&S CYCLE
MSRP: $484.95Now: $446.15Was: $484.95If you're serious about extracting more power from your Big Twin, displacement is king—and this S&S piston kit delivers exactly that. By bumping your 883cc or 1200cc engine to a full 1250cc, you'll...09101937- SKU:
- 09101937
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.25:1
- DISPLACEMENT:
- 89'
- BORE - OVERSIZE:
- +0,010'
- PISTON MATERIAL:
- FORGED
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON HEAD SHAPE:
- FLAT TOP
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
MSRP: $484.95Now: $446.15Was: $484.95 -
On Sale
S&S CYCLE Piston Kit 106-5556
S&S CYCLE
MSRP: $484.95Now: $446.15Was: $484.95If you're running a 883cc or 1200cc Big Twin and want genuine displacement gains without a complete engine overhaul, this S&S piston kit delivers 1250cc of additional cubic inches at a proven 10.3:1...09101938- SKU:
- 09101938
- Availability:
- Ships Same Business Day
- Weight:
- 2.37 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.25:1
- DISPLACEMENT:
- 89'
- TYPE:
- REPLACEMENT
- BORE - OVERSIZE:
- +0,020'
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON HEAD SHAPE:
- FLAT TOP
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON MATERIAL:
- FORGED
MSRP: $484.95Now: $446.15Was: $484.95 -
On Sale
S&S CYCLE Piston Kit 106-5793
S&S CYCLE
MSRP: $484.95Now: $446.15Was: $484.95If you're running an 883cc or 1200cc Big Twin and want genuine displacement gains without complete engine teardown, the S&S CYCLE 1250cc Piston Kit delivers 67 additional cubic centimeters of swept...09101939- SKU:
- 09101939
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.25:1
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,030'
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON HEAD SHAPE:
- FLAT TOP
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- DISPLACEMENT:
- 89'
- TYPE:
- REPLACEMENT
MSRP: $484.95Now: $446.15Was: $484.95Qty in Cart: 0Quantity:Price:MSRP: $484.95Now: $446.15Was: $484.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-4414
S&S CYCLE
MSRP: $514.95Now: $473.75Was: $514.95If you're running an 883cc or 1200cc Big Twin and want measurable power gains without a complete engine rebuild, this S&S piston kit delivers a straightforward path to 1250cc displacement and a...09102141- SKU:
- 09102141
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE SIZE IMPERIAL:
- 3.927'
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- DISPLACEMENT:
- 97'
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- FLAT TOP
- TYPE:
- REPLACEMENT
- BORE - OVERSIZE:
- +0,010'
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- STROKE LENGTH IMPERIAL:
- 4'
MSRP: $514.95Now: $473.75Was: $514.95 -
On Sale
S&S CYCLE Piston Kit 106-4416
S&S CYCLE
MSRP: $514.95Now: $473.75Was: $514.95If you're running a Big Twin and want real displacement gains without a full engine rebuild, the S&S Cycle 1250cc Piston Kit delivers measurable power increases through proven engineering. These cast...09102142- SKU:
- 09102142
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE SIZE IMPERIAL:
- 3.927'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- PISTON HEAD SHAPE:
- FLAT TOP
- TYPE:
- REPLACEMENT
- BORE - OVERSIZE:
- +0,010'
- DISPLACEMENT:
- 106'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
MSRP: $514.95Now: $473.75Was: $514.95Qty in Cart: 0Quantity:Price:MSRP: $514.95Now: $473.75Was: $514.95Subtotal: -
On Sale
S&S CYCLE Piston Kit - Shovelhead 106-5535
S&S CYCLE
MSRP: $410.95Now: $378.07Was: $410.95If you're rebuilding a Shovelhead engine or upgrading from worn OEM pistons, the S&S Cycle Piston Kit delivers the strength and longevity your engine demands. These forged pistons handle the thermal...09101992- SKU:
- 09101992
- Availability:
- Ships Same Business Day
- Weight:
- 2.82 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
MSRP: $410.95Now: $378.07Was: $410.95 -
On Sale
S&S CYCLE Piston Kit - Shovelhead 106-5536
S&S CYCLE
MSRP: $410.95Now: $378.07Was: $410.95When you're rebuilding a Shovelhead, piston quality directly determines engine reliability and performance longevity. S&S Cycle's forged piston kit delivers the strength and precision needed to...09101993- SKU:
- 09101993
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE SIZE IMPERIAL:
- 3.635'
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,010'
MSRP: $410.95Now: $378.07Was: $410.95 -
On Sale
S&S CYCLE Piston Kit - Shovelhead 106-5537
S&S CYCLE
MSRP: $410.95Now: $378.07Was: $410.95If you're rebuilding or upgrading your Shovelhead, piston quality directly impacts reliability, longevity, and how your engine performs under load. S&S Cycle's forged piston kit engineered with...09101994- SKU:
- 09101994
- Availability:
- Ships Same Business Day
- Weight:
- 2.87 LBS
- BORE - OVERSIZE:
- +0,020'
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- BORE SIZE IMPERIAL:
- 3.645'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
MSRP: $410.95Now: $378.07Was: $410.95 -
On Sale
S&S CYCLE Piston Kit - Shovelhead 106-5538
S&S CYCLE
MSRP: $410.95Now: $378.07Was: $410.95If you're building or rebuilding a Shovelhead, piston quality directly impacts engine reliability, noise levels, and longevity. S&S Cycle's forged piston kit delivers the strength and precision...09101995- SKU:
- 09101995
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE - OVERSIZE:
- +0,030'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.655'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.030'
MSRP: $410.95Now: $378.07Was: $410.95 -
On Sale
S&S CYCLE Cylinder Kit - 883-1200 910-0688
S&S CYCLE
MSRP: $1,128.95Now: $1,038.63Was: $1,128.95Upgrading your 883cc Harley to 1200cc displacement is one of the most straightforward ways to unlock meaningful power gains without extensive engine work. The S&S Cycle Cylinder Kit eliminates...09030944- SKU:
- 09030944
- Availability:
- Ships Same Business Day
- Weight:
- 23.36 LBS
- DISPLACEMENT:
- 1200 CC
- MATERIAL:
- CAST
- PRODUCT NAME:
- CONVERSION KIT
- COLOR/FINISH:
- SILVER
- COMPRESSION RATIO IMPERIAL:
- 9.4:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.500'
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MATERIAL:
- IRON
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
MSRP: $1,128.95Now: $1,038.63Was: $1,128.95 -
On Sale
S&S CYCLE Cylinder Kit - 883-1200 910-0687
S&S CYCLE
MSRP: $1,128.95Now: $1,038.63Was: $1,128.95Step up from your 883cc without the headaches of a full engine rebuild. This S&S Cycle kit delivers genuine displacement gains—1200cc of additional breathing room—while eliminating the machine work,...09030945- SKU:
- 09030945
- Availability:
- Ships Same Business Day
- Weight:
- 23.25 LBS
- DISPLACEMENT:
- 1200 CC
- MATERIAL:
- ALUMINUM
- BORE SIZE IMPERIAL:
- 3.500'
- COLOR/FINISH:
- WRINKLE BLACK
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- UNITS:
- KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- IRON
- COMPRESSION RATIO IMPERIAL:
- 9.4:1
- MATERIAL:
- CAST
- PRODUCT NAME:
- CONVERSION KIT
MSRP: $1,128.95Now: $1,038.63Was: $1,128.95 -
On Sale
S&S CYCLE Cam with Plate - 585 Series - Twin Cam 330-0553
S&S CYCLE
MSRP: $1,924.95Now: $1,770.95Was: $1,924.95The S&S 585 Series cam with plate delivers measurable gains in lift and optimized timing, translating directly to improved horsepower and throttle response across your power band. This bolt-in...09251111- SKU:
- 09251111
- Availability:
- Ships Same Business Day
- Weight:
- 11.35 LBS
- GRIND:
- 585 SERIES
- INTAKE CLOSE IMPERIAL:
- 45°
- INTAKE LIFT IMPERIAL:
- 0.585'
- MODEL:
- STANDARD
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 260°
- TYPE:
- CHAIN
- INTAKE OPEN IMPERIAL:
- 20°
- APPLICATION:
- EXHAUST
- EXHAUST CLOSE IMPERIAL:
- 20°
- EXHAUST LIFT IMPERIAL:
- 0.585'
- EXHAUST OPEN IMPERIAL:
- 60°
- INTAKE DURATION IMPERIAL:
- 245°
MSRP: $1,924.95Now: $1,770.95Was: $1,924.95 -
On Sale
S&S CYCLE Cam Support Plate - Twin Cam 310-0625
S&S CYCLE
MSRP: $395.95Now: $364.27Was: $395.95The S&S Cycle Cam Support Plate is essential for Twin Cam engines requiring precise oil delivery and reliable bushing support under high-performance conditions. This component eliminates the need to...09250914- SKU:
- 09250914
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- BASE COLOR:
- BLUE
- STYLE:
- CHAIN DRIVE
- MATERIAL:
- ALUMINUM
- MODEL:
- TC3
- TYPE:
- CAM SUPPORT
- UNITS:
- EACH
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- PLATE
- RIDING STYLE:
- STREET
MSRP: $395.95Now: $364.27Was: $395.95 -
On Sale
S&S CYCLE Cam Support Plate - Big Twin 310-0623
S&S CYCLE
MSRP: $395.95Now: $364.27Was: $395.95A quality cam support plate is fundamental to reliable valve train geometry and oil delivery in your Big Twin engine. The S&S Cycle unit eliminates guesswork with field-adjustable oil pressure...09250915- SKU:
- 09250915
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- BASE COLOR:
- BLUE
- MATERIAL:
- ALUMINUM
- MODEL:
- TC3
- RIDING STYLE:
- STREET
- TYPE:
- CAM SUPPORT
- UNITS:
- EACH
- STYLE:
- GEAR DRIVE
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- PLATE
MSRP: $395.95Now: $364.27Was: $395.95 -
On Sale
S&S CYCLE HVHP Oil Pump Cover - Standard 31-6209
S&S CYCLE
MSRP: $530.95Now: $488.47Was: $530.95Stock oil pump systems struggle to manage the volume demands of high-output engines, leading to excessive crankcase pressure and oil blow-by that compromises sealing and performance. The S&S Cycle...316209- SKU:
- 316209
- Availability:
- Ships Same Business Day
- Weight:
- 2.94 LBS
- FEATURES:
- STANDARD FLYWHEELS OR PINION SHAFT
- UNITS:
- KIT
- COLOR/FINISH:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- '92 - '99 STYLE COVER
- TYPE:
- OIL
- BASE COLOR:
- SILVER
- FLOW RATE:
- HIGH VOLUME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PUMP
MSRP: $530.95Now: $488.47Was: $530.95 -
On Sale
S&S CYCLE Hydraulic Tensioner Cam Shoe 330-0521
S&S CYCLE
MSRP: $40.95Now: $37.67Was: $40.95Proper cam chain tension is critical to maintain valve timing accuracy and prevent catastrophic engine damage. The S&S Cycle Hydraulic Tensioner Cam Shoe extends service intervals with its thicker...09251076- SKU:
- 09251076
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MOUNTING POSITION:
- -
- COLOR/FINISH:
- WHITE
- RIDING STYLE:
- STREET
- TYPE:
- CAM
- UNITS:
- EACH
- MATERIAL:
- 6061 ALUMINUM
- PRODUCT NAME:
- TENSIONER SHOE
MSRP: $40.95Now: $37.67Was: $40.95 -
On Sale
S&S CYCLE Cam Kit - 635C - Twin Cam 330-0328
S&S CYCLE
MSRP: $418.95Now: $385.43Was: $418.95The S&S Cycle 635C cam kit is engineered for builders pushing modified twin cam engines into the high-performance envelope. If you're running increased compression, upgraded valvetrain components,...09250836- SKU:
- 09250836
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- APPLICATION:
- INTAKE
- EXHAUST LIFT IMPERIAL:
- 0.635'
- INTAKE CLOSE IMPERIAL:
- 43.5°
- EXHAUST DURATION IMPERIAL:
- 276°
- FEATURES:
- CAM KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- INTAKE DURATION IMPERIAL:
- 243°
- TYPE:
- CHAIN
- EXHAUST CLOSE IMPERIAL:
- 37.5°
- EXHAUST OPEN IMPERIAL:
- 58.5°
- GRIND:
- 635 SERIES
- INTAKE LIFT IMPERIAL:
- 0.635'
- INTAKE OPEN IMPERIAL:
- 19.5°
- PRODUCT NAME:
- CAM KIT
MSRP: $418.95Now: $385.43Was: $418.95 -
On Sale
S&S CYCLE Cams - 475 Series - Gear Drive - Twin Cam 106-4033
S&S CYCLE
MSRP: $948.95Now: $873.03Was: $948.95If you're running a Twin Cam 106 engine and want to extract every bit of performance from your build, eliminating timing chain lash is non-negotiable. S&S Cycle's 475 Series gear drive cams replace...09251015- SKU:
- 09251015
- Availability:
- Ships Same Business Day
- Weight:
- 6.20 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- CAMCHEST KIT
- APPLICATION:
- EXHAUST
- COLOR/FINISH:
- CHROME
- GRIND:
- 475G
- RIDING STYLE:
- STREET
- TYPE:
- GEAR
- APPLICATION:
- INTAKE
MSRP: $948.95Now: $873.03Was: $948.95 -
On Sale
S&S CYCLE Outer Cam Gears - Twin Cam 33-4276
S&S CYCLE
MSRP: $346.95Now: $319.19Was: $346.95If you're building a high-performance Twin Cam engine, gear-driven cams deliver the reliability and precision you need for consistent valve timing under extreme conditions. S&S Cycle's Outer Cam...09251016- SKU:
- 09251016
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- TYPE:
- CAM
- UNITS:
- KIT
- PRODUCT NAME:
- GEAR KIT
- RIDING STYLE:
- STREET
- SIZE:
- -
MSRP: $346.95Now: $319.19Was: $346.95
