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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EASTERN MOTORCYCLE PARTS Crankpin Nut/Lock Kit A-23966-78
EASTERN MOTORCYCLE PARTS
$49.95A secure crankpin assembly is non-negotiable for engine reliability, and this fastener kit delivers the precision fit and locking integrity your engine needs to withstand sustained high RPM operation. Whether you're rebuilding a race engine or servicing...DS194010- SKU:
- DS194010
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- LOCK KIT
- RIDING STYLE:
- STREET
- TYPE:
- CRANKPIN
- UNITS:
- KIT
$49.95 -
EASTERN MOTORCYCLE PARTS Tappet Rollers A-18534-29B
EASTERN MOTORCYCLE PARTS
$117.95Tappet roller wear directly impacts valve train efficiency and engine reliability—degraded rollers lead to increased friction, valve timing drift, and potential catastrophic engine damage. These OEM-spec replacements restore precise valve actuation and...DS194029- SKU:
- DS194029
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- ROLLER
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- TYPE:
- TAPPET
$117.95 -
EASTERN MOTORCYCLE PARTS Cam Shims - XL A-6770
EASTERN MOTORCYCLE PARTS
$6.70Proper cam timing is non-negotiable for peak engine performance, and cam shims are essential for dialing in exact valve timing specifications during setup or rebuild. The Eastern Motorcycle Parts A-6770 XL Cam Shims give you the precision adjustment...DS194070- SKU:
- DS194070
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- TYPE:
- 1ST GEAR
- TYPE:
- 4TH GEAR
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- SIZE IMPERIAL:
- 0.005'
- PRODUCT NAME:
- SHIM
- TYPE:
- 3RD GEAR
- TYPE:
- CAM
$6.70 -
EASTERN MOTORCYCLE PARTS Cam Shims - XL A-6769
EASTERN MOTORCYCLE PARTS
$6.70Proper cam shimming is non-negotiable when installing new camshafts—getting this wrong compromises valve timing, increases wear, and tanks performance. The Eastern Motorcycle Parts Cam Shims (XL A-6769) deliver precise thickness adjustments to dial in...DS194071- SKU:
- DS194071
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- SIZE IMPERIAL:
- 0.007'
- TYPE:
- 4TH GEAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SHIM
- TYPE:
- 3RD GEAR
- TYPE:
- CAM
- UNITS:
- 10 PACK
- TYPE:
- 1ST GEAR
$6.70 -
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-34180-33
EASTERN MOTORCYCLE PARTS
$13.50Transmission work demands precision at every fastener point, and worn or damaged lock tab washers can compromise bolt security and lead to costly reassembly failures. The Eastern Motorcycle Parts A-34180-33 lock tab washer is engineered to maintain...09500412- SKU:
- 09500412
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- WASHER
- TYPE:
- LOCK TAB
- UNITS:
- 10 PACK
- RIDING STYLE:
- OFF-ROAD
$13.50 -
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-35216-36
EASTERN MOTORCYCLE PARTS
$10.80Lock tab washers are critical fastening components that prevent bolts from loosening due to vibration during transmission operation. If you're rebuilding a Shovelhead transmission, worn or missing lock tab washers can result in loose fasteners, component...09500413- SKU:
- 09500413
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- WASHER
- UNITS:
- 10 PACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- LOCK TAB
$10.80 -
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-37533-52A
EASTERN MOTORCYCLE PARTS
$10.80Transmission work demands precision—and worn or damaged lock tab washers compromise the integrity of critical fasteners. This OEM Eastern Motorcycle Parts replacement washer ensures proper fastener retention and prevents unwanted loosening during...09500414- SKU:
- 09500414
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- LOCK TAB
- UNITS:
- 10 PACK
$10.80 -
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-33396-39
EASTERN MOTORCYCLE PARTS
$13.40Transmission rebuild work demands precision fastening components that won't slip or fail under operating stress. The Eastern Motorcycle Parts Lock Tab Washer A-33396-39 is a critical wear item that should be replaced during any transmission service to...09500415- SKU:
- 09500415
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- LOCK TAB
- UNITS:
- 10 PACK
$13.40 -
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-33082-16
EASTERN MOTORCYCLE PARTS
$14.80Transmission work demands precision down to the smallest component. Lock tab washers are critical fastening elements that prevent bolt loosening under the vibration and thermal cycling your transmission experiences during operation. Using...09500416- SKU:
- 09500416
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- LOCK TAB
- UNITS:
- 10 PACK
- PRODUCT NAME:
- WASHER
$14.80 -
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-35050-40
EASTERN MOTORCYCLE PARTS
$10.80Transmission work demands precision at every fastening point, and worn or damaged lock tab washers compromise the integrity of critical connections. The Eastern Motorcycle Parts A-35050-40 lock tab washer is engineered to maintain secure fastening under...09500417- SKU:
- 09500417
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- LOCK TAB
- PRODUCT NAME:
- WASHER
- UNITS:
- 10 PACK
- RIDING STYLE:
- OFF-ROAD
$10.80 -
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-35050-52
EASTERN MOTORCYCLE PARTS
$9.40Transmission work demands precision at every fastener, and worn or damaged lock tab washers compromise the integrity of critical connections. The EASTERN MOTORCYCLE PARTS Lock Tab Washer A-35050-52 ensures your fasteners remain secure under operating...09500418- SKU:
- 09500418
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- LOCK TAB
- UNITS:
- 10 PACK
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- OFF-ROAD
$9.40 -
EASTERN MOTORCYCLE PARTS Pinion Spacer A-24703-54
EASTERN MOTORCYCLE PARTS
$25.95Proper pinion spacing is critical for rear axle assembly alignment and differential longevity. This Eastern Motorcycle Parts spacer ensures precise positioning of your pinion gear, reducing backlash and preventing premature wear on your drivetrain. Trust...09500288- SKU:
- 09500288
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- PINION SHAFT GEAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPACER
- UNITS:
- EACH
$25.95 -
EASTERN MOTORCYCLE PARTS Crankcase Roller Bearings A-9262-12
EASTERN MOTORCYCLE PARTS
$14.95Crankcase roller bearings are critical to engine longevity—they support radial loads on your crankshaft while maintaining precise clearances under extreme RPM and pressure. Eastern Motorcycle Parts' A-9262-12 bearings deliver the precision fit and...09500532- SKU:
- 09500532
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ROLLER
- UNITS:
- 12 PACK
- RIDING STYLE:
- STREET
- SIZE:
- OVERSIZE (+0,0002')
- SIZE IMPERIAL:
- OVERSIZE (+0.0002')
- PRODUCT NAME:
- BEARING
$14.95 -
EASTERN MOTORCYCLE PARTS Oil Line O-6-082
EASTERN MOTORCYCLE PARTS
$35.95Reliable oil line routing is fundamental to engine longevity in high-performance applications. The EASTERN MOTORCYCLE PARTS Oil Line O-6-082 delivers dependable flow management with corrosion-resistant construction, ensuring consistent oil delivery under...09500537- SKU:
- 09500537
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- MATERIAL:
- STEEL
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- EACH
- PRODUCT NAME:
- LINE KIT
- STYLE:
- FEED LINE
$35.95 -
EASTERN MOTORCYCLE PARTS Relief Valve Spring - Big Twin A-26210-99
EASTERN MOTORCYCLE PARTS
$2.70The relief valve spring is a critical hydraulic component that maintains proper oil pressure throughout your Big Twin engine, preventing catastrophic pressure spikes that can compromise gaskets, seals, and internal components. A worn or weak spring...09500232- SKU:
- 09500232
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- TYPE:
- RELIEF VALVE
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SPRING
$2.70 -
EASTERN MOTORCYCLE PARTS Nut Rocker Shaft - Black/Chrome - 4 Pack V-13-245
EASTERN MOTORCYCLE PARTS
$18.95Rocker shaft integrity is critical to valve train reliability and engine performance—worn or damaged shafts compromise timing precision and increase wear on adjacent components. This 4-pack of Eastern Motorcycle Parts rocker shafts delivers OEM-quality...09500972- SKU:
- 09500972
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- RIDING STYLE:
- STREET
- TYPE:
- NUT ROCKER
- BASE COLOR:
- BLACK
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- NUT
- UNITS:
- 4 PACK
$18.95 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacer A-24008-99
EASTERN MOTORCYCLE PARTS
$63.95Proper sprocket shaft alignment is critical to drivetrain efficiency and longevity. This precision-engineered spacer ensures correct chain tension and sprocket geometry, preventing premature wear on your gears and transmission. Installing the right...09500228- SKU:
- 09500228
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SHAFT SPACER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- SPROCKET
$63.95 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacer - Softail A-24038-99
EASTERN MOTORCYCLE PARTS
$47.95Precise sprocket shaft alignment is critical for smooth power delivery and longevity in Softail drivetrains. This Eastern Motorcycle Parts spacer eliminates play between components, reducing vibration and wear on your primary chain and sprockets. A...09500230- SKU:
- 09500230
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- SHAFT SPACER
- TYPE:
- SPROCKET
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$47.95 -
EASTERN MOTORCYCLE PARTS Left Ball Bearing A-8989
EASTERN MOTORCYCLE PARTS
$37.95Worn or damaged wheel bearings compromise handling precision and create safety risks—especially critical in high-performance riding where steering response and stability are non-negotiable. The Eastern Motorcycle Parts Left Ball Bearing A-8989 delivers...09500325- SKU:
- 09500325
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- COUNTERBALANCE SHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- LEFT
- UNITS:
- EACH
$37.95 -
EASTERN MOTORCYCLE PARTS Right Ball Bearing A-8991
EASTERN MOTORCYCLE PARTS
$33.95Precision-engineered ball bearings are critical to maintaining smooth, reliable operation in high-performance motorcycle applications. The Eastern Motorcycle Parts A-8991 delivers the exact tolerances and durability you need to keep your drivetrain...09500326- SKU:
- 09500326
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- MOUNTING POSITION:
- RIGHT
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
- TYPE:
- COUNTERBALANCE SHAFT
- RIDING STYLE:
- STREET
$33.95
