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 T124HC Long-Block Engine 310-0882A
S&S CYCLE
MSRP: $8,595.95Now: $7,908.27Was: $8,595.95If you're building serious performance into a 2006-17 Dyna platform, a factory long-block simply won't cut it. The S&S T124HC delivers the displacement, airflow, and reliability you need to make real...09010240- SKU:
- 09010240
- Availability:
- Ships Same Business Day
- Weight:
- 155.00 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- WRINKLE BLACK
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- MODEL:
- T-SERIES
- STROKE LENGTH IMPERIAL:
- 4.625'
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- PISTON HEAD SHAPE:
- FLAT TOP
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- ENGINE
- RIDING STYLE:
- STREET
- STYLE:
- HIGH COMPRESSION
- TYPE:
- LONG BLOCK
MSRP: $8,595.95Now: $7,908.27Was: $8,595.95Qty in Cart: 0Quantity:Price:MSRP: $8,595.95Now: $7,908.27Was: $8,595.95Subtotal: -
On Sale
S&S CYCLE Replacement Rings 94-1214X
S&S CYCLE
MSRP: $65.95Now: $60.67Was: $65.95If you're running S&S pistons in your engine, keeping factory replacement rings on hand ensures you maintain peak compression and oil control when it's time for a refresh. These OEM-spec rings are...09120099- SKU:
- 09120099
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- PRODUCT NAME:
- PISTON RING
- PISTON SIZE IMPERIAL:
- +0.040'
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
- UNITS:
- SET
MSRP: $65.95Now: $60.67Was: $65.95Qty in Cart: 0Quantity:Price:MSRP: $65.95Now: $60.67Was: $65.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5498
S&S CYCLE
MSRP: $479.95Now: $441.55Was: $479.95When you're building or rebuilding a high-performance engine, your pistons are the foundation of reliability and power output. The S&S Cycle 106-5498 delivers forged strength with modern alloy...09101921- SKU:
- 09101921
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- DISPLACEMENT:
- 74'
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.4675'
- TYPE:
- LOW COMPRESSION
- BORE - OVERSIZE:
- +0,030'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
MSRP: $479.95Now: $441.55Was: $479.95Qty in Cart: 0Quantity:Price:MSRP: $479.95Now: $441.55Was: $479.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5506
S&S CYCLE
MSRP: $469.95Now: $432.35Was: $469.95A quality piston kit is the foundation of engine reliability and performance longevity. The S&S Cycle 106-5506 delivers forged construction that withstands extreme combustion pressures while modern...09101930- SKU:
- 09101930
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- BORE - OVERSIZE:
- +0,030'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.4675'
- DISPLACEMENT:
- 74'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- TYPE:
- HIGH COMPRESSION
MSRP: $469.95Now: $432.35Was: $469.95Qty in Cart: 0Quantity:Price:MSRP: $469.95Now: $432.35Was: $469.95Subtotal: -
On Sale
S&S CYCLE HVHP Oil Pump Cover Kit - Standard 31-6298
S&S CYCLE
MSRP: $715.95Now: $658.67Was: $715.95Stock oil pump systems often struggle to manage high-output engine demands, leaving excess oil sloshing in your crankcase and compromising breather efficiency. The S&S Cycle HVHP Oil Pump Cover Kit...316298- SKU:
- 316298
- Availability:
- Ships Same Business Day
- Weight:
- 3.62 LBS
- STYLE:
- '92 - '99 STYLE COVER
- BASE COLOR:
- SILVER
- FLOW RATE:
- HIGH VOLUME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PUMP
- UNITS:
- KIT
- COLOR/FINISH:
- ALUMINUM
- FEATURES:
- S&S FLYWHEELS OR PINION SHAFT
- RIDING STYLE:
- STREET
- TYPE:
- OIL
MSRP: $715.95Now: $658.67Was: $715.95Qty in Cart: 0Quantity:Price:MSRP: $715.95Now: $658.67Was: $715.95Subtotal: -
On Sale
S&S CYCLE Cam - 450 Series - Big Twin 33-5062
S&S CYCLE
MSRP: $255.95Now: $235.47Was: $255.95If you're building a Big Twin with modest compression and want reliable torque where it matters—off-idle through midrange—the S&S 450 Series cam delivers proven performance without surprises. This...09250416- SKU:
- 09250416
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- APPLICATION:
- EXHAUST
- INTAKE LIFT IMPERIAL:
- 0.475'
- PRODUCT NAME:
- CAM
- EXHAUST LIFT IMPERIAL:
- 0.475'
- GRIND:
- 450 SERIES
- INTAKE LIFT AT TDC IMPERIAL:
- 0.158'
- APPLICATION:
- INTAKE
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.152'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $255.95Now: $235.47Was: $255.95 -
On Sale
S&S CYCLE Pinion Gear 33-4123
S&S CYCLE
MSRP: $142.95Now: $131.51Was: $142.95The S&S Cycle Pinion Gear 33-4123 is engineered for Shovelhead engines that demand reliable power transmission and smooth gear engagement. Whether you're rebuilding a classic cruiser or maintaining a...DS194472- SKU:
- DS194472
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- COLOR/FINISH:
- RED
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GEAR
- SIZE IMPERIAL:
- 1.4475' - 1.4480'
- TYPE:
- PINION
- BASE COLOR:
- RED
- UNITS:
- EACH
MSRP: $142.95Now: $131.51Was: $142.95Qty in Cart: 0Quantity:Price:MSRP: $142.95Now: $131.51Was: $142.95Subtotal: -
On Sale
S&S CYCLE Pinion Gear 33-4126
S&S CYCLE
MSRP: $142.95Now: $131.51Was: $142.95The S&S Cycle Pinion Gear 33-4126 is essential for maintaining precise power delivery in your Shovelhead motor. A worn or damaged pinion gear compromises your entire drivetrain's efficiency and can...DS194477- SKU:
- DS194477
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- GEAR
- TYPE:
- PINION
- BASE COLOR:
- WHITE
- SIZE IMPERIAL:
- 1.4460' - 1.4465'
MSRP: $142.95Now: $131.51Was: $142.95 -
On Sale
Wiseco Piston Kit 121" 4.135" Bore 2017-2021 Harley-Davidson FLHR K2806
WISECO
MSRP: $576.95Now: $446.00Was: $576.95If you're serious about extracting maximum power from your M8 engine, a quality piston kit is non-negotiable. The Wiseco K2806 delivers the compression ratio and durability your 121" big-bore...09031680- SKU:
- 09031680
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- DISPLACEMENT:
- 121'
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- UNITS:
- KIT
- PISTON MATERIAL:
- ARMORX™
- BORE SIZE IMPERIAL:
- 4.135'
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
MSRP: $576.95Now: $446.00Was: $576.95 -
On Sale
Wiseco Piston Kit 107ci 11:1 Compression for Harley-Davidson 2017-2021 K2784
WISECO
MSRP: $524.95Now: $446.00Was: $524.95If you're looking to unlock more power from your M8 without sacrificing reliability, this Wiseco piston kit delivers the compression and durability you need. The 11:1 compression ratio produces...09031551- SKU:
- 09031551
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- DISPLACEMENT:
- 1746 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON HEAD SHAPE:
- DOMED
- PISTON MATERIAL:
- ARMORX™
MSRP: $524.95Now: $446.00Was: $524.95Qty in Cart: 0Quantity:Price:MSRP: $524.95Now: $446.00Was: $524.95Subtotal: -
On Sale
Wiseco 3.218in. Piston Ring Set for 1972-1985 Harley-Davidson XLH1000 3218X
WISECO
MSRP: $49.95Now: $42.00Was: $49.95Keep your XLH1000 running at peak efficiency with a precision piston ring set engineered for superior compression and minimal blow-by. Whether you're rebuilding after a top-end refresh or replacing a...3218X- SKU:
- 3218X
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- BORE - OVERSIZE:
- +0,030'
- RIDING STYLE:
- STREET
- RING MATERIAL:
- STEEL
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- MODEL:
- X-RING
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 3.218'
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco Piston Kit Standard 1972-1985 XLH1000 K1600
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Whether you're executing a top-end rebuild or pushing your XLH1000 into overbore territory, a quality piston kit is non-negotiable for reliability and performance. The Wiseco K1600 delivers the...K1600- SKU:
- K1600
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE IMPERIAL:
- 3.188'
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- EACH
- DISPLACEMENT:
- 1000 CC
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
MSRP: $344.95Now: $293.00Was: $344.95Qty in Cart: 0Quantity:Price:MSRP: $344.95Now: $293.00Was: $344.95Subtotal: -
On Sale
Wiseco Piston Kit 1972-1985 XLH1000 K1601
WISECO
MSRP: $344.95Now: $293.00Was: $344.95A top-end rebuild demands precision components that can handle sustained power delivery without compromise. The Wiseco Piston Kit delivers exactly that—a complete, engineered solution for 1972-1985...K1601- SKU:
- K1601
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- BORE - OVERSIZE:
- +0,010'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 1003 CC
- PISTON MATERIAL:
- FORGED
- BORE SIZE IMPERIAL:
- 3.198'
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM ALLOY
MSRP: $344.95Now: $293.00Was: $344.95Qty in Cart: 0Quantity:Price:MSRP: $344.95Now: $293.00Was: $344.95Subtotal: -
On Sale
Wiseco Piston Kit 1972-1985 XLH1000 10:1 Compression K1603
WISECO
MSRP: $344.95Now: $293.00Was: $344.95A top-end rebuild demands precision components that can handle sustained RPMs and cylinder pressures without compromise. The Wiseco Piston Kit K1603 delivers the complete solution for your 1972-1985...K1603- SKU:
- K1603
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- BORE - OVERSIZE:
- +0,030'
- BORE SIZE IMPERIAL:
- 3.218'
- DISPLACEMENT:
- 1016 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- FORGED
MSRP: $344.95Now: $293.00Was: $344.95Qty in Cart: 0Quantity:Price:MSRP: $344.95Now: $293.00Was: $344.95Subtotal: -
PERFORMANCE MACHINE (PM) Scallop Rocker Box Cover - Chrome - M8 0177-2070-CH
PERFORMANCE MACHINE (PM)
$1,026.95A worn or damaged rocker box cover compromises both aesthetics and engine protection on your M8. The PM Scallop Rocker Box Cover delivers a factory-correct replacement with aggressive scallop...09401927- SKU:
- 09401927
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- STYLE:
- SCALLOPED
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$1,026.95Qty in Cart: 0Quantity:Price:$1,026.95Subtotal: -
PERFORMANCE MACHINE (PM) Cam Cover - Vision - M8 - Contrast Cut 0177-2082M-BM
PERFORMANCE MACHINE (PM)
$519.95A cam cover isn't just cosmetics—it's a direct statement about your build quality. The PM Vision Cam Cover replaces your stock cover with a precision-machined alternative that showcases your...09401977- SKU:
- 09401977
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- TYPE:
- CAM
- UNITS:
- EACH
- COLOR/FINISH:
- CONTRAST CUT™
- MODEL:
- VISION
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
$519.95Qty in Cart: 0Quantity:Price:$519.95Subtotal: -
DRAG SPECIALTIES Rocker Arm Shaft 231986
DRAG SPECIALTIES
$19.03The rocker arm shaft is a critical component in your Harley Davidson's valvetrain, directly affecting valve timing, lift, and overall engine responsiveness. A worn or damaged shaft compromises...09270023- SKU:
- 09270023
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- APPLICATION:
- EXHAUST
- TYPE:
- ROCKER ARM
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SHAFT
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- FRONT
$19.03Qty in Cart: 0Quantity:Price:$19.03Subtotal: -
DRAG SPECIALTIES Points Cover - Chrome/Black 30-0152DA
DRAG SPECIALTIES
$33.87A points cover serves as both a functional engine component and a visible style statement on your motorcycle. This chrome and black cover protects your ignition points while adding classic custom...09400843- SKU:
- 09400843
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- STYLE:
- LIVE TO RIDE
- TYPE:
- POINT
$33.87Qty in Cart: 0Quantity:Price:$33.87Subtotal: -
DRAG SPECIALTIES Points Cover - Black 30-0170ASB
DRAG SPECIALTIES
$28.57A points cover isn't just protective hardware—it's a visible component that defines your engine's aesthetic while safeguarding critical ignition components from dirt, moisture, and debris. This Drag...09401242- SKU:
- 09401242
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- COLOR/FINISH:
- FLAT
- RIDING STYLE:
- STREET
- TYPE:
- POINTS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- STYLE:
- RADIUS
$28.57 -
DRAG SPECIALTIES Points Cover - Chrome/Black I30-0223CA
DRAG SPECIALTIES
$35.99A points cover does more than protect your ignition system from debris and moisture—it's the finishing touch that ties together your engine's aesthetic with functional precision. Whether you're...09401645- SKU:
- 09401645
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- STYLE:
- LIVE TO RIDE
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- COVER
- TYPE:
- ENGINE
$35.99
