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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FEULING OIL PUMP CORP. Gear Drive Cams - 525 Series 1004
FEULING OIL PUMP CORP.
$399.95If you're running a stock or mildly modified big-twin engine, you're leaving power on the table without optimized cam timing. The Feuling Oil Pump Corp. 525 Series Gear Drive Cam transforms your engine's low and mid-range performance, delivering the...09250425- SKU:
- 09250425
- Availability:
- Ships Same Business Day
- Weight:
- 2.86 LBS
- APPLICATION:
- EXHAUST
- EXHAUST LIFT IMPERIAL:
- 0.535'
- GRIND:
- 525 SERIES
- APPLICATION:
- INTAKE
- EXHAUST CLOSE IMPERIAL:
- 5°
- EXHAUST OPEN IMPERIAL:
- 51°
- INTAKE DURATION IMPERIAL:
- 226°
- TYPE:
- GEAR
- INTAKE CLOSE IMPERIAL:
- 42°
- MODEL:
- REAPER
- EXHAUST DURATION IMPERIAL:
- 236°
- INTAKE LIFT IMPERIAL:
- 0.525'
- INTAKE OPEN IMPERIAL:
- 4°
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$399.95 -
FEULING OIL PUMP CORP. Chain Drive Cams - 525 Series 1001
FEULING OIL PUMP CORP.
$399.95If you're running a stock or mildly modified big-twin and want noticeable gains in low-end torque and throttle response without a complete valve train overhaul, the Feuling 525 Series delivers exactly that. This bolt-in camshaft expands your usable power...09250513- SKU:
- 09250513
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- APPLICATION:
- EXHAUST
- EXHAUST LIFT IMPERIAL:
- 0.535'
- GRIND:
- 525 SERIES
- INTAKE DURATION IMPERIAL:
- 226°
- INTAKE CLOSE IMPERIAL:
- 42°
- INTAKE LIFT IMPERIAL:
- 0.525'
- MODEL:
- REAPER
- APPLICATION:
- INTAKE
- EXHAUST CLOSE IMPERIAL:
- 5°
- EXHAUST OPEN IMPERIAL:
- 51°
- TYPE:
- CHAIN
- EXHAUST DURATION IMPERIAL:
- 236°
- INTAKE OPEN IMPERIAL:
- 4°
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$399.95 -
EASTERN MOTORCYCLE PARTS Pushrod - Right End A-37089-84
EASTERN MOTORCYCLE PARTS
$24.95A properly functioning pushrod is critical to maintaining valve train precision and engine reliability. The EASTERN MOTORCYCLE PARTS Pushrod (Right End A-37089-84) ensures consistent valve actuation and eliminates the performance loss that comes with...DS192522- SKU:
- DS192522
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DIAMETER IMPERIAL:
- 2.625'
- PRODUCT NAME:
- PUSHROD END
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- RIGHT
- TYPE:
- CLUTCH
$24.95 -
EASTERN MOTORCYCLE PARTS Pushrod End - Left A-37090-79
EASTERN MOTORCYCLE PARTS
$14.95A worn or damaged pushrod end compromises valve train precision and can lead to catastrophic engine failure if left unaddressed. This Eastern Motorcycle Parts pushrod end restores OEM tolerances and reliable valve actuation, ensuring consistent...DS192523- SKU:
- DS192523
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
- PRODUCT NAME:
- PUSHROD END
- UNITS:
- EACH
- DIAMETER IMPERIAL:
- 1.5625'
- MOUNTING POSITION:
- LEFT
$14.95Qty in Cart: 0Quantity:Price:$14.95Subtotal: -
EASTERN MOTORCYCLE PARTS Cam Bushing Kit - XL 15-0145
EASTERN MOTORCYCLE PARTS
$225.95Cam bushing wear is one of the most overlooked sources of power loss and mechanical noise in high-performance engines. This complete kit eliminates guesswork by providing all necessary bushings, bearings, lock pins, and shims in one package—ensuring...DS194196- SKU:
- DS194196
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CAM
- UNITS:
- KIT
- PRODUCT NAME:
- BUSHING KIT
$225.95Qty in Cart: 0Quantity:Price:$225.95Subtotal: -
EASTERN MOTORCYCLE PARTS Cam Bushing Kit - XL 15-0149
EASTERN MOTORCYCLE PARTS
$182.95A worn or damaged cam bushing kit compromises valve timing accuracy and increases parasitic drag on your engine's top end. This complete EASTERN MOTORCYCLE PARTS kit eliminates guesswork by supplying all necessary cam and gear shaft bushings, bearings,...DS194197- SKU:
- DS194197
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BUSHING KIT
- TYPE:
- CAM
- UNITS:
- KIT
$182.95Qty in Cart: 0Quantity:Price:$182.95Subtotal: -
EASTERN MOTORCYCLE PARTS Cam Bushing A-25581-70
EASTERN MOTORCYCLE PARTS
$37.95A worn or damaged cam bushing compromises valve timing precision and can lead to excessive wear on your camshaft and cylinder head. This OEM-spec Eastern Motorcycle Parts bushing restores proper fit and clearance, ensuring reliable valve actuation and...DS194198- SKU:
- DS194198
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- BUSHING
- TYPE:
- SUPPORT PLATE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$37.95 -
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
