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 Chrome Lifter Cover - Twin Cam 106-3883
S&S CYCLE
MSRP: $249.95Now: $224.96Was: $249.95Engine bay aesthetics matter, but more importantly, a quality lifter cover protects critical engine components from contamination and thermal stress. The S&S Cycle Chrome Lifter Cover combines polished chrome styling with engineered precision, ensuring...09400966- SKU:
- 09400966
- Availability:
- Ships Same Business Day
- Weight:
- 1.08 LBS
- MATERIAL:
- 6061 T-6 ALUMINUM
- UNITS:
- PAIR
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET
- TYPE:
- TAPPET
MSRP: $249.95Now: $224.96Was: $249.95Qty in Cart: 0Quantity:Price:MSRP: $249.95Now: $224.96Was: $249.95Subtotal: -
On Sale
S&S CYCLE Cam Cover 106-3499
S&S CYCLE
MSRP: $365.95Now: $329.36Was: $365.95A properly sealed cam cover protects your generator motor's internal valve train from debris, moisture, and contamination while maintaining reliable engine breathing. This S&S Cycle unit delivers OEM-style functionality with robust cast construction,...09401045- SKU:
- 09401045
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- FEATURES:
- INCLUDES GASKET
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- COVER
- TYPE:
- GENERATOR GEAR
MSRP: $365.95Now: $329.36Was: $365.95Qty in Cart: 0Quantity:Price:MSRP: $365.95Now: $329.36Was: $365.95Subtotal: -
On Sale
S&S CYCLE Chrome Billet Lifter Cover - Twin Cam 33-5601
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95A quality lifter cover protects one of your engine's most critical components from contamination and oil loss while maintaining a clean, finished appearance on your Twin Cam engine. S&S Cycle's billet aluminum design eliminates the voids and dimensional...09400295- SKU:
- 09400295
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- MATERIAL:
- 6061 T-6 ALUMINUM
- MATERIAL:
- BILLET
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- TYPE:
- TAPPET
MSRP: $299.95Now: $269.96Was: $299.95Qty in Cart: 0Quantity:Price:MSRP: $299.95Now: $269.96Was: $299.95Subtotal: -
On Sale
S&S CYCLE Cam Cover - Polished Billet - Big Twin 31-0335
S&S CYCLE
MSRP: $595.95Now: $536.36Was: $595.95A polished billet cam cover transforms your Big Twin's engine bay from stock to show-quality while delivering the precision engineering S&S Cycle is known for. Machined from solid 6061 aluminum, this cover resists corrosion and maintains its finish...09400300- SKU:
- 09400300
- Availability:
- Ships Same Business Day
- Weight:
- 4.37 LBS
- COLOR/FINISH:
- POLISHED
- RIDING STYLE:
- STREET
- TYPE:
- CAM
- PRODUCT NAME:
- COVER KIT
- MATERIAL:
- BILLET ALUMINUM
- UNITS:
- KIT
MSRP: $595.95Now: $536.36Was: $595.95 -
On Sale
S&S CYCLE Left Main Seal - Sportster 91-13 31-4060
S&S CYCLE
MSRP: $39.95Now: $35.96Was: $39.95A worn or leaking main seal compromises engine reliability and can lead to costly oil loss and potential drivetrain damage. The S&S Cycle Left Main Seal is engineered to OEM specifications, ensuring a secure fit that prevents leakage and maintains proper...09350861- SKU:
- 09350861
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- INSIDE DIAMETER:
- 1,500'
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- APPLICATION:
- SPROCKET SHAFT
- OUTSIDE DIAMETER:
- 2,000'
- OUTSIDE DIAMETER IMPERIAL:
- 2.000'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,313'
- THICKNESS IMPERIAL:
- 0.313'
- TYPE:
- OIL
- APPLICATION:
- CRANKSHAFT
- INSIDE DIAMETER IMPERIAL:
- 1.500'
MSRP: $39.95Now: $35.96Was: $39.95 -
On Sale
S&S CYCLE Easy Start Cam Kit 106-5293
S&S CYCLE
MSRP: $540.95Now: $486.86Was: $540.95Cold starts on high-compression big-twin engines can drain your battery and burn out your starter—fast. The S&S Cycle Easy Start Cam Kit solves this by intelligently reducing crank compression during startup, then automatically returning to full power...09250521- SKU:
- 09250521
- Availability:
- Ships Same Business Day
- Weight:
- 3.82 LBS
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.170'
- FEATURES:
- INCLUDES INSTALLATION KIT
- GRIND:
- 551 SERIES
- INTAKE DURATION IMPERIAL:
- 215°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 91°
- MODEL:
- EASY START
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 102°
- INTAKE LIFT IMPERIAL:
- 0.550'
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- TYPE:
- CHAIN
- EXHAUST OPEN IMPERIAL:
- 41°
- APPLICATION:
- EXHAUST
- EXHAUST CLOSE IMPERIAL:
- 17°
- EXHAUST DURATION IMPERIAL:
- 237°
- EXHAUST LIFT IMPERIAL:
- 0.550'
- INTAKE CLOSE IMPERIAL:
- 19°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.178'
- INTAKE OPEN IMPERIAL:
- 17°
MSRP: $540.95Now: $486.86Was: $540.95 -
On Sale
S&S CYCLE Pushrods with Tubes - Twin Cam 93-5095
S&S CYCLE
MSRP: $249.95Now: $224.96Was: $249.95Pushrods are critical to your Twin Cam's valve train geometry and reliability. S&S Cycle's chromoly construction ensures superior strength under high RPM conditions, while the adjustable design accommodates various build specifications without guesswork...09280017- SKU:
- 09280017
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
- STYLE:
- ADJUSTABLE
- MATERIAL:
- CHROMOLY STEEL
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PUSHROD KIT
- UNITS:
- KIT
MSRP: $249.95Now: $224.96Was: $249.95 -
On Sale
S&S CYCLE Base Gaskets - 4" 930-0094
S&S CYCLE
MSRP: $15.95Now: $14.36Was: $15.95Proper base gasket selection is critical to preventing coolant and oil leaks that compromise engine integrity and performance. S&S Cycle's Pro-Formance micropore compound is engineered to withstand extreme combustion pressures and temperature cycling...09345022- SKU:
- 09345022
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,46 MM (0,018')
- THICKNESS IMPERIAL:
- 0,018'
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 4.000'
- FEATURES:
- STOCK BOLT PATTERN
- THICKNESS METRIC:
- 0.46 MM
MSRP: $15.95Now: $14.36Was: $15.95 -
On Sale
S&S CYCLE Cam with Plate - 551 Series - Easy Start 330-0544
S&S CYCLE
MSRP: $2,025.95Now: $1,823.36Was: $2,025.95Stock cam systems on high-mileage engines are vulnerable to chain stretch, tensioner wear, and timing degradation—issues that compromise valve lift, timing precision, and overall reliability. The S&S 551 Series Easy Start cam upgrade replaces the entire...09251109- SKU:
- 09251109
- Availability:
- Ships Same Business Day
- Weight:
- 11.15 LBS
- APPLICATION:
- EXHAUST
- EXHAUST CLOSE IMPERIAL:
- 17°
- EXHAUST LIFT IMPERIAL:
- 0.550'
- INTAKE CLOSE IMPERIAL:
- 19°
- INTAKE OPEN IMPERIAL:
- 17°
- TYPE:
- CHAIN
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 237°
- MODEL:
- EASY START
- RIDING STYLE:
- STREET
- EXHAUST OPEN IMPERIAL:
- 41°
- GRIND:
- 551 SERIES
- INTAKE DURATION IMPERIAL:
- 215°
- INTAKE LIFT IMPERIAL:
- 0.550'
- PRODUCT NAME:
- CAMSHAFT
- UNITS:
- KIT
MSRP: $2,025.95Now: $1,823.36Was: $2,025.95 -
On Sale
S&S CYCLE Inner Cam Bearing - Twin Cam 31-4080
S&S CYCLE
MSRP: $16.95Now: $15.26Was: $16.95The Twin Cam engine demands precision at every bearing surface, and inferior replacements invite catastrophic failure at high RPM. S&S Cycle's inner cam bearings restore OEM tolerances and durability, ensuring reliable valve actuation and extended engine...09240387- SKU:
- 09240387
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CAM
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- TYPE:
- NEEDLE
- RIDING STYLE:
- STREET
MSRP: $16.95Now: $15.26Was: $16.95 -
On Sale
S&S CYCLE Springs - .585" - Twin Cam 900-0593
S&S CYCLE
MSRP: $163.95Now: $147.56Was: $163.95If you're running a high-lift cam on your Twin Cam 900, valve float will kill both your performance and reliability. S&S Cycle's dual-spring kit is engineered to maintain valve control at aggressive lift profiles, ensuring consistent sealing and...09262722- SKU:
- 09262722
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
- SPRING OPEN PRESSURE:
- 325 LB
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- SPRING LIFT:
- 0,585'
- TYPE:
- VALVE
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.585'
- UNITS:
- KIT
MSRP: $163.95Now: $147.56Was: $163.95 -
On Sale
S&S CYCLE Chain Drive Cam - 510C - Twin Cam 33-5182A
S&S CYCLE
MSRP: $399.95Now: $359.96Was: $399.95Stock timing chains stretch and wear over time, introducing lash that degrades valve timing accuracy and limits peak performance. The S&S Cycle Chain Drive Cam eliminates this problem by replacing your stock chain drive with precision-machined gears,...09250532- SKU:
- 09250532
- Availability:
- Ships Same Business Day
- Weight:
- 4.12 LBS
- GRIND:
- 510 SERIES
- PRODUCT NAME:
- CAM KIT
- TYPE:
- CHAIN
- APPLICATION:
- EXHAUST
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.187'
- INTAKE LIFT IMPERIAL:
- 0.510'
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- EXHAUST LIFT IMPERIAL:
- 0.510'
- INTAKE LIFT AT TDC IMPERIAL:
- 0.187'
MSRP: $399.95Now: $359.96Was: $399.95 -
On Sale
S&S CYCLE CAM KIT 475C M8 17- 330-0641
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95The S&S Cycle 475C cam kit is engineered to unlock measurable horsepower gains from your M8 platform without requiring internal machine work or valve train modifications. Whether you're building a track-focused machine or maximizing street performance,...09251171- SKU:
- 09251171
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- EXHAUST CLOSE IMPERIAL:
- 28.5° FRONT, 20.2° REAR
- EXHAUST OPEN IMPERIAL:
- 55.5° FRONT, 52.2° REAR
- INTAKE DURATION IMPERIAL:
- 213.5°
- INTAKE OPEN IMPERIAL:
- 6.2° FRONT, 2.2° REAR
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- EXHAUST LIFT IMPERIAL:
- 0.475'
- GRIND:
- 475C
- INTAKE LIFT IMPERIAL:
- 0.475'
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 263.9° FRONT, 252.5° REAR
- INTAKE CLOSE IMPERIAL:
- 27.2° FRONT, 31.2° REAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CAM
- TYPE:
- CHAIN
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
S&S CYCLE Cylinder Heads 106-4277
S&S CYCLE
MSRP: $2,149.95Now: $1,934.96Was: $2,149.95S&S Cycle cylinder heads deliver measurable flow improvements that enhance performance immediately while laying the foundation for future engine modifications. Whether you're running a stock 88" big twin or pushing displacement north of 103", these fully...09300062- SKU:
- 09300062
- Availability:
- Ships Same Business Day
- Weight:
- 28.65 LBS
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SILVER
- UNITS:
- PAIR
- DISPLACEMENT:
- 79 CC
MSRP: $2,149.95Now: $1,934.96Was: $2,149.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 106-3227
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95S&S Cycle cylinder heads deliver measurable high-port flow gains that unlock performance now while preserving headroom for future upgrades. Whether you're running a stock 88-cubic-inch or pushing a built 110-inch motor, these fully assembled heads match...09300063- SKU:
- 09300063
- Availability:
- Ships Same Business Day
- Weight:
- 28.50 LBS
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 79 CC
- COLOR/FINISH:
- SILVER
- UNITS:
- PAIR
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 106-3233
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95If you're building a Twin Cam engine that demands reliable airflow and the flexibility to upgrade later, S&S Cycle cylinder heads deliver the port flow you need without forcing a complete rebuild down the road. These fully assembled heads accept OEM...09300064- SKU:
- 09300064
- Availability:
- Ships Same Business Day
- Weight:
- 28.65 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 79 CC
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 106-3240
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95If you're building a Twin Cam engine that demands serious port flow without sacrificing reliability, S&S Cycle cylinder heads deliver the airflow foundation every upgrade depends on. These fully assembled heads are precision-engineered to handle...09300066- SKU:
- 09300066
- Availability:
- Ships Same Business Day
- Weight:
- 28.50 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 89 CC
- UNITS:
- PAIR
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Headbolt Kit 93-3070
S&S CYCLE
MSRP: $149.95Now: $134.96Was: $149.95Proper head bolt specifications are critical for cylinder head clamping force, sealing integrity, and long-term reliability on high-performance engines. The S&S CYCLE 93-3070 kit delivers the precision fitment and quality materials needed for S&S Twin...09300023- SKU:
- 09300023
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
MSRP: $149.95Now: $134.96Was: $149.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 90-1293
S&S CYCLE
MSRP: $1,815.95Now: $1,634.36Was: $1,815.95The S&S CYCLE Cylinder Heads (90-1293) deliver measurable port flow improvements that unlock performance gains now while preserving headroom for future upgrades—whether you're running stock displacement or pushing into big-inch territory. These fully...09300058- SKU:
- 09300058
- Availability:
- Ships Same Business Day
- Weight:
- 28.71 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 79 CC
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
MSRP: $1,815.95Now: $1,634.36Was: $1,815.95 -
On Sale
S&S CYCLE Tappet Roller Kit 330-0377
S&S CYCLE
MSRP: $163.95Now: $147.56Was: $163.95Tappet roller wear is one of the most common failure points in high-performance engine builds, directly impacting valve train reliability and longevity. The S&S CYCLE Tappet Roller Kit 330-0377 replaces worn rollers with precision-engineered components...09290049- SKU:
- 09290049
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- PRODUCT NAME:
- ROLLER KIT
- TYPE:
- TAPPET
- MATERIAL:
- 52100 STEEL
- MATERIAL:
- CHROMOLY STEEL
MSRP: $163.95Now: $147.56Was: $163.95
