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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JIMS Crank Pin for Harley-Davidson Big Twin 1941-1981 23961-413
JIMS
$141.80A worn or damaged crank pin compromises your Big Twin's reliability and performance—this JIMS replacement ensures your engine maintains precise pin specifications for consistent power delivery and longevity. Built to OEM or better standards and...DS194004- SKU:
- DS194004
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CRANKPIN
- BASE COLOR:
- SILVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- 3 HOLE
$141.80Qty in Cart: 0Quantity:Price:$141.80Subtotal: -
Jims Crank Pin for 1995-1998 Harley-Davidson Dyna Super Glide FXD 23961-80A3
JIMS
$145.50The crank pin is a critical rotating component that directly transfers combustion forces through your engine—any wear or damage compromises reliability and performance. This JIMS replacement meets or exceeds OEM specifications, ensuring your Big Twin...DS194005- SKU:
- DS194005
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CRANKPIN
- TYPE:
- 3 HOLE
- BASE COLOR:
- SILVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$145.50 -
JIMS Manual Compression Release Valves for Harley-Davidson FLHR Road King 1999-2016 727K
JIMS
$137.90High-compression big-inch motors demand reliable starting performance, and inadequate compression relief puts unnecessary strain on your starter system. JIMS Manual Compression Release Valves solve this problem by venting excess cylinder pressure during...DS196400- SKU:
- DS196400
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- PRIMARY STARTER
- STYLE:
- MANUAL
- TYPE:
- COMPRESSION RELEASE
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- VALVE
- UNITS:
- PAIR
$137.90Qty in Cart: 0Quantity:Price:$137.90Subtotal: -
Jims Tappet Roller 1965-1984 Harley-Davidson FLH Electra Glide 18534-29A
JIMS
$42.55Tappet roller wear is one of the most common causes of Big Twin valve train noise and performance loss. JIMS' 52100 bearing steel roller with 4340 chromoly axle delivers the wear resistance and strength needed to keep your valve train operating smoothly...DS197020- SKU:
- DS197020
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- 52100 STEEL
- PRODUCT NAME:
- ROLLER KIT
- MATERIAL:
- CHROMOLY STEEL
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- TAPPET
$42.55 -
Jims Sprocket Shaft Oil Seal Spacer for Harley-Davidson Softail 1986-1999 24002-70
JIMS
$43.65A leaking sprocket shaft seal creates a cascading problem: oil loss reduces bearing lubrication, accelerates seal degradation, and compromises the entire drivetrain's reliability. The JIMS Sprocket Shaft Oil Seal Spacer 24002-70 eliminates this risk by...DS197034- SKU:
- DS197034
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- EACH
- TYPE:
- SPROCKET SHAFT
- PRODUCT NAME:
- SPACER
- RIDING STYLE:
- STREET
$43.65 -
Jims Sprocket Shaft Spacers for Harley-Davidson FL 1955-1964 24029-KIT
JIMS
$124.15If your classic Harley-Davidson FL is weeping oil around the sprocket shaft, the problem isn't always the seal itself—it's often inadequate sealing surface contact. These JIMS Sprocket Shaft Spacers restore proper geometry to your seal interface,...DS197035- SKU:
- DS197035
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- PRODUCT NAME:
- SPACER KIT
- RIDING STYLE:
- STREET
- UNITS:
- 8 PACK
- THICKNESS IMPERIAL:
- 0.366' - 0.666'
- TYPE:
- SPROCKET SHAFT
$124.15 -
Jims Oil Pump Return Drive Gear for 1992 Harley-Davidson Dyna Glide 26315-68A
JIMS
$58.50A worn or inadequate oil pump drive gear compromises lubrication efficiency across your Big Twin engine, leading to accelerated component wear and reduced reliability. The JIMS 26315-68A restores optimal oil circulation, protecting critical engine...DS197039- SKU:
- DS197039
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- DRIVE
- TYPE:
- OIL PUMP
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$58.50 -
Jims Feed Idler Oil Pump Gear for 1984-1998 Harley-Davidson Big Twin 26326-62A
JIMS
$58.95Your Big Twin's oil system is only as reliable as its weakest component—and a worn or undersized feed idler gear will starve your engine of critical lubrication under load. The JIMS Feed Idler Oil Pump Gear restores proper oil delivery and pressure...DS197050- SKU:
- DS197050
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- IDLER
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
$58.95Qty in Cart: 0Quantity:Price:$58.95Subtotal: -
Jims Feed Drive Oil Pump Gear for Harley-Davidson Big Twin 1968-1984 26328-74
JIMS
$58.95The oil pump gear is the heart of your Big Twin's lubrication system—a worn or degraded gear starves your engine of vital oil flow, leading to increased friction, heat buildup, and catastrophic engine damage. The JIMS Feed Drive Oil Pump Gear restores...DS197051- SKU:
- DS197051
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- DRIVE
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
$58.95Qty in Cart: 0Quantity:Price:$58.95Subtotal: -
Jims Wrist Pin Bushing for Harley-Davidson Big Twin 1936-1999 24334-36
JIMS
$51.45Wrist pin bushings are critical to your Big Twin's longevity—they absorb the lateral forces your connecting rod generates thousands of times per minute. A worn bushing accelerates piston wear, increases blowby, and can lead to catastrophic engine failure...DS197065- SKU:
- DS197065
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- BUSHING
- SIZE IMPERIAL:
- STANDARD
- MATERIAL:
- BRONZE
- RIDING STYLE:
- STREET
- TYPE:
- WRIST PIN
- UNITS:
- PAIR
$51.45 -
JIMS Wrist Pin Bushing for Harley-Davidson Big Twin 1936-1999 24335-36
JIMS
$51.45The wrist pin bushing is a critical wear component that directly impacts your Big Twin's reliability and longevity. Over time, stock bushings develop excessive clearance, leading to piston slap, increased friction, and accelerated engine wear. This JIMS...DS197066- SKU:
- DS197066
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- BUSHING
- SIZE IMPERIAL:
- OVERSIZE (+0.005')
- UNITS:
- PAIR
- MATERIAL:
- BRONZE
- RIDING STYLE:
- STREET
- TYPE:
- WRIST PIN
$51.45 -
JIMS Wrist Pin Bushing for 2004-2006 Harley-Davidson XL 883R 24331-36
JIMS
$51.45The wrist pin bushing is a critical wear component in your engine's connecting rod assembly—when tolerances drift, you lose power transfer efficiency and risk catastrophic rod failure. This JIMS bushing maintains concentricity within .0002", ensuring...DS198825- SKU:
- DS198825
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- WRIST PIN
- MATERIAL:
- BRONZE
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- PAIR
$51.45 -
Jims Pinion Shaft Nut 1981-1989 Harley-Davidson FXSTC 24016-80
JIMS
$35.70A loose or worn pinion shaft nut compromises your drivetrain's integrity and can lead to catastrophic bearing failure and transmission damage. The JIMS Pinion Shaft Nut delivers the precision fit and holding power your flywheel-side pinion shaft demands,...DS198835- SKU:
- DS198835
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- NUT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- DIAMETER - THREAD SIZE IMPERIAL:
- 3/4-20
- TYPE:
- PINION SHAFT
$35.70 -
Jims Sprocket Shaft Nut for 1980-1985 Harley-Davidson Softail Standard FXST 24017-80
JIMS
$39.55The stock sprocket shaft nut on your 1980-1985 Softail Standard can loosen under sustained high-torque conditions, leading to chain slippage and potential drivetrain damage. JIMS' precision-engineered replacement ensures your sprocket stays locked in...DS198836- SKU:
- DS198836
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- NUT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- SPROCKET SHAFT
- DIAMETER - THREAD SIZE IMPERIAL:
- 1-1/8-16
$39.55 -
EASTERN MOTORCYCLE PARTS Plate Separator A-25279-36
EASTERN MOTORCYCLE PARTS
$14.80A plate separator maintains precise clutch stack geometry and prevents premature wear on your friction surfaces. This OEM-replica component ensures consistent engagement and reliable power transfer across heat cycles, whether you're street riding or...09500343- SKU:
- 09500343
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- TYPE:
- BREATHER SEPARATOR
- UNITS:
- 5 PACK
- PRODUCT NAME:
- PLATE
- RIDING STYLE:
- STREET
$14.80 -
EASTERN MOTORCYCLE PARTS Screen Separator Plate A-25275-36
EASTERN MOTORCYCLE PARTS
$17.50The screen separator plate is a critical component in your motorcycle's cooling and lubrication system, directing oil flow with precision to maintain engine efficiency and protect vital components. A worn or damaged separator plate compromises cooling...09500352- SKU:
- 09500352
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SCREEN
- TYPE:
- BREATHER SEPARATOR
$17.50 -
EASTERN MOTORCYCLE PARTS Rocker Arm Shaft M-4-4534
EASTERN MOTORCYCLE PARTS
$51.95A precision rocker arm shaft is fundamental to maintaining proper valve actuation and engine reliability. Eastern Motorcycle Parts' M-4-4534 delivers OEM-quality performance with domestic manufacturing standards, ensuring tight tolerances and consistent...09500355- SKU:
- 09500355
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER ARM
- UNITS:
- EACH
- PRODUCT NAME:
- SHAFT
$51.95 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacer A-24008-03
EASTERN MOTORCYCLE PARTS
$31.95A precision sprocket shaft spacer is essential for maintaining proper chain alignment and reducing wear on your drivetrain components. The Eastern Motorcycle Parts A-24008-03 ensures exact spacing tolerances that keep your sprocket positioned correctly...09500357- SKU:
- 09500357
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- SPROCKET
- PRODUCT NAME:
- SHAFT SPACER
$31.95 -
EASTERN MOTORCYCLE PARTS Cam Bearing 40-0300
EASTERN MOTORCYCLE PARTS
$14.95A worn or damaged cam bearing compromises valve timing precision and can lead to accelerated wear on your camshaft and cylinder head—ultimately costing you far more in repairs. The EASTERN MOTORCYCLE PARTS Cam Bearing 40-0300 is an OEM-quality...09240262- SKU:
- 09240262
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CAM
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- TYPE:
- NEEDLE
- RIDING STYLE:
- STREET
$14.95 -
EASTERN MOTORCYCLE PARTS Pinion Bearing A-23928-87
EASTERN MOTORCYCLE PARTS
$31.95A worn or failing pinion bearing compromises your motorcycle's drivetrain efficiency and can lead to catastrophic gear damage if left unaddressed. This OEM-equivalent replacement restores proper bearing preload and radial clearance, eliminating play in...09240264- SKU:
- 09240264
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- PINION SHAFT
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
$31.95
